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[Q] Digital audio output ?

Hi,
i would like to build a simple and hi-quality hi-fi, using my TF101 as digital source to feed a DAC with .flac lossless music. I wonder how to connect my tablet to the DAC :
1°) My favorite solution would be to send data to the DAC using wireless from my TF, but i seriously doubt anything like this is possible ?
2°) Then I would like to use USB audio output as many hifi DAC devices already use those connectors. Here again, not sure at all if TF101/honeycomb manages USB audio out ?
3°) Finally i could use the HDMI output but few DAC use that connector. I saw on ebay one that take "HDMI I2S" input, will our TF be able to send that kind of signal ?
Any help is welcome !

1. Honey Player. You need Airport Express as receiver. It has optical out.
2. Probably not.
3. Should work.

[Q] USB Speakers - Is it Possible

Hi guys I was wondering if it was possible to get the transformer to output music through the USB ports. I have a set of portable Creative speakers which have great sound and would love to use them with the transformer. They are powered and receive audio from USB

It is very possible, but you'd ave to add the device modules (drivers for the device) to the kernel yourself because it isn't native. I've been trying to get USB headphones working for a while.. :/

Thing O Doom said:
It is very possible, but you'd ave to add the device modules (drivers for the device) to the kernel yourself because it isn't native. I've been trying to get USB headphones working for a while.. :/
Click to expand...
Click to collapse
Got work usb audio on tf101 with CM10. Just kernel modules for usb audio are not enough to get sound from apps to be routed through the DAC. It's also needed to patch vertana audio driver.

I know it's been a long time but I just got around to rooting my TF101 and actually enjoying it. Has anyone done anything similar with speakers or headphones
Sent from my Transformer TF101 using xda app-developers app

Lollipop - Any Improvements?
Has anyone been able to get USB Audio working in a Lollipop ROM given the improvements to USB host?
So far, no luck for me:
KatKiss Lollipop 5.1 #21 ROM
JBL Pebbles USB Speakers connected to the dock
My tablet recognizes there is a USB audio device as the audio stops after connecting.
Also, disabling auto routing of audio to USB audio devices does what it supposed to do - so detection works.
Connecting the headphones out to the aux in of the USB speaker didn't work. Tablet speakers shut off but no sound in the USB speakers.
I could get it to work is powering the speakers from an AC charger and using the tablet headphone out to it.
Also, USB Audio Tester app works in that it can detect the USB device and it was able to play audio out of it (tested via connecting int mic to ext speaker mode and raising the volume bars).
To my understanding from the developer's description, that app uses non-standard interface to output USB audio.
The speakers work fine on Windows and Chrome OS without drivers so I was hoping it was plug and play.
Update:
I did note that I had to raise the in-app playback control volume bars first though to work in USB Audio Tester app.
Also, when connected to a computer and using the Aux In of the speakers, my phones and tablet can play audio.
Based on power draw of a USB charger I connected, the speakers use 0.6W idle and about 1W max.
Therefore, I'm thinking maybe it fails the USB enumeration in Android and the default 100mA is not enough.
Anyone know how to check the USB host enumeration settings?

phioschaos said:
Has anyone been able to get USB Audio working in a Lollipop ROM given the improvements to USB host?
So far, no luck for me:
KatKiss Lollipop 5.1 #21 ROM
JBL Pebbles USB Speakers...
...Also, USB Audio Tester app works in that it can detect the USB device and it was able to play audio out of it (tested via connecting int mic to ext speaker mode and raising the volume bars).
To my understanding from the developer's description, that app uses non-standard interface to output USB audio...
Click to expand...
Click to collapse
Since we are talking about USB HOST, maybe it's important to use USB OTG cable, I reckon, as not all USB cables are equal. This has just recently struck me, because I used USB cable that came with my soundcard the other day. Its of great quality, sure, but I'm almost positive it's not OTG. My audiocard is externally powered, so on the other hand it might be just unimportant in my case...
USB Speakers of all sorts have generic DACs in them that require no special drivers and have to work out of the box on any system as long as USB connection and standard USB functionality are intact. Success stories of USB Audio working under Lollipop are rather abundant.
If USB Audio Tester works for you then USB Audio Player PRO should too, those are made by the same guys AFAICT. UAPP is no free app though, costs a sum, and sadly its proprietary driver(yeah, those devs apps use "non-standard interface") only works inside the program, one cannot watch Youtube or MX Player by using that... Compatibility list is on the devs site. My card, E-MU 0404 USB is listed as compatible for only RECORDING, not playback. Heck, I'm absolutely certain, I saw someone on some forum claiming they got same card totally working under UAPP and that wasn't even on Lollipop! Anyway, my trial and error continues...

I don't have a USB OTG cable for the TF101.
Instead, I'm using the keyboard dock that provides two USB ports.
It should be the same thing.
It is very good to hear that USB audio is working for a lot of people on Lollipop.
I've tried testing my speakers on more Android devices - my Nexus 5 and Samsung Galaxy Tab S.
Like the TF101, the speakers are detected as the OS switches over (no more audio out of built in speakers) but no sound out of the speakers themselves.
I'm leaning towards these speakers are not compatible with Android yet.
Sigh - non-standard standards.

What is a 'WWW' MCU? Anyone using USB Audio?

Hi,
I run a car audio firm, we have a PX5-based unit a client ordered.. The MCU version is "MTCD_WWW_V2.54b_2" .. Our goal is USB audio working proper, among a few other things (better interface if possible, better apps, better SQ stuff)
I haven't seen a "www" mcu anywhere? It's sold as an EONON GA7150A..
Anyone know anything about this MCU? If it's compatible with any others or anything like that? I definitely would like to root it, update the ROM to something better, get rid of the "Windows Mobile" part of it which was, IIRC, advertised as the ability to 'boot' between Android and Windows but is actually just a different interface theme from the home screen.. Also want to do whatever we can for sound quality and smooth experience.
I should note that, as a car audio company (in Canada), we are seriously considering producing our own Android units.. likely 'producing' would consist of getting units like a px5, branding them and primarily, having a SOLID software system built for automotive use. I think a lot of these units are a great start and are ALMOST there for a lot of things but..some of the interface stuff is rushed, not translated great, etc.
What I'd like to see is an Android unit, priced like these ones usually are, but with *really* good class A interfaces. The kind of experience you'd expect on a Samsung phone or a Pioneer headunit. I personally have been using my Samsung Tab S 8.4" in my car as my 'head unit' (paired with a Pioneer single din for a hardware volume knob and some easy control) for along time and I would not want to ever go back.
Here's a short video of the interface and version info..
My eventual goal is getting USB audio working decently. It does work for most Android apps but the volume control only controls the internal audio chip, and the radio app routes through the internal audio chip as well.. I assume perhaps other sources like DVD and line-in would as well, I haven't verified but I will pretty quick here. I plan on making another video showing what works/what doesn't/how it works.
I'm hoping for a software only solution but am happy to hack the hardware if needed. I'm using a Behringer UCA-222 as a "DAC" (same as 202 but red in color) but won't actually be using the DAC in it but only it's optical output into an Audison Bit 8.9 DSP/Amplifier.
There's the possibility of routing the px5's audio output RCA's to the Behringer's Input and 'monitoring' that input to the optical output via software but that doesn't solve the fact the volume control does nothing for apps when using the USB.. Eg, youtube plays through USB/optical fine but volume control doesn't change the volume..Radio plays through the px5's audio chip and volume control controls that, and shows on screen.. I could force everything to play thru the px5 audio chip and then monitor it to optical but that defeats the purpose of what I'm trying to do completely (full digital audio to the amplifier).
I'm willing to sacrifice some sources re-routed like that though, eg, the radio would be fine as it already sounds ****. Aux in also doesn't sound great usually and won't be used in this car anyway. DVD would be nice to have optical out as well but
I'm currently still searching for a schematic/block diagram for these devices, this would probably answer a lot of my questions like.. I'm curious whether audio from any of the other onboard devices (radio, dvd, aux in) go through Android at all or whether they're directly sourced to the output chip.
If it's the latter - that sucks - but I wouldn't be surprised. I have read the thread about the hardware hack to allow android control of the audio chip but I don't see this giving me the functionality I need. If it is wired like this, and I can get the other components (eg. radio chip) to output their audio to Android, digitally somehow and have Android push it to the USB audio device that'd be cool.
Is no one else using a USB dac on any of these units? I have many years experience coding, hacking, electronic engineering, tinkering, etc. including Android but I haven't done many of these Android Head Units.. A lot of times we use tablets instead! But this client wanted OEM look..so we thought we'd give it a shot.
The difference between the audio quality from the internal DAC and the USB audio device's optical routed directly to the DSP (digital to the power amp) is definitely noticeable, even with there being very little noise picked up in our interconnects.

Hi,
I can help you only with WWW MCU,
forbiddenera said:
Hi,
I run a car audio firm, we have a PX5-based unit a client ordered.. The MCU version is "MTCD_WWW_V2.54b_2" .. Our goal is USB audio working proper, among a few other things (better interface if possible, better apps, better SQ stuff)
I haven't seen a "www" mcu anywhere? It's sold as an EONON GA7150A..
Anyone know anything about this MCU? If it's compatible with any others or anything like that? I definitely would like to root it, update the ROM to something better, get rid of the "Windows Mobile" part of it which was, IIRC, advertised as the ability to 'boot' between Android and Windows but is actually just a different interface theme from the home screen.. Also want to do whatever we can for sound quality and smooth experience.
Click to expand...
Click to collapse
tha same question (#1956) i read in this thread https://forum.xda-developers.com/an...-head-unit-discussion-thread-t3573881/page196
it should be KLD (klyde), you can read the answer in post #1959

Thanks for the pointer.

Hi,
I uses the newsmy carpad since 2 yrs with android box with wince interface and same issue of radio, bt and dvd being analog while the android side of things is 100% digital output via the included hdmi.
I put aside my alpine pxa-h900 and installed the helix dsp pro with auto switching of input with priority on digital input and use internet radio apps, android bt apps and plugged in an usb portable drive for dvd/cd.
Cheers.
Richard
Singapore

Finding the Right Music Player for the Essential Phone's USB-C headphone adapter

One of the disappointing trends for me with new phones is the lack of a 3.5mm headphone jacks. However, given the popularity of wireless headphones and the large market share of Apple devices I expect the trend to continue and headphone jacks to be found on fewer and fewer phones in the future.
I imagine that I'm in the minority of users who use neither streaming services or Bluetooth headphones. My music is usually high bit rate FLAC, ACC or MP3 depending on when I ripped it. My initial listening on the included 3.5mm DAC was not promising. A lack of dynamic range and low volume even on efficient in ear monitors (IEMs) made me think about finding a replacement.
The problem is there aren't at lot of options for small passive DACs. And my bet is that most of the current phones with no 3.5mm jack use the same chipset that Essential uses - the Conexant CX20985 for their headphone adapters. (For more info - see the AnandTech article - Conexant Introduces USB-C Digital Audio Compliant Chips.)
So that lead me to see if perhaps there was something that could be done in software. Based on my limited research it would appear that Android above version 5.0 has a built in USB to DAC driver. It also appears that this is what Essential uses to access the USB adapter. However, this driver is quite limited. Consistent with what I heard, the driver resamples everything to 16-bit 48kHz and limits the dynamic range. (For more info see extreamsd.com and their USB audio driver page.)
Good news! There are several music player applications on GooglePlay that are capable of natively recognizing the Essential DAC over USB. The difference in sound quality, volume and dynamic range is like night and day. The most polished one I've used is the paid application Onkyo HF Player. However, the free application HibyMusic also works, but has few rough edges. The Onkyo application sounds good enough for me to make finding a better DAC no longer necessary.
One WARNING on both programs and the Essential DAC - when the DAC is recognized by the programs they frequently turn the initial volume level to 100%. If you do this while you've started music playing and have the headphones on you will be in for a very rude surprise. Trust me I learned this the hard way - plug everything in with no music playing and be sure to lower the volume first.
Update from comments - Apps that support the Essential DAC directly:
1. Onkyo HF Player
2. HibyMusic
3. USB Audio Player Pro
4. Neutron Music Player

USB Audio Player Pro has a custom driver that supports bit-perfect on android. I use it with external DACs such as the Meridian Explorer 2 (MQA works perfectly) and the AudioQuest Dragonfly Red - hardware volume control works.

TimboC2000 said:
One of the disappointing trends for me with new phones is the lack of a 3.5mm headphone jacks. However, given the popularity of wireless headphones and the large market share of Apple devices I expect the trend to continue and headphone jacks to be found on fewer and fewer phones in the future.
I imagine that I'm in the minority of users who use neither streaming services or Bluetooth headphones. My music is usually high bit rate FLAC, ACC or MP3 depending on when I ripped it. My initial listening on the included 3.5mm DAC was not promising. A lack of dynamic range and low volume even on efficient in ear monitors (IEMs) made me think about finding a replacement.
The problem is there aren't at lot of options for small passive DACs. And my bet is that most of the current phones with no 3.5mm jack use the same chipset that Essential uses - the Conexant CX20985 for their headphone adapters. (For more info - see the AnandTech article - Conexant Introduces USB-C Digital Audio Compliant Chips.)
So that lead me to see if perhaps there was something that could be done in software. Based on my limited research it would appear that Android above version 5.0 has a built in USB to DAC driver. It also appears that this is what Essential uses to access the USB adapter. However, this driver is quite limited. Consistent with what I heard, the driver resamples everything to 16-bit 48kHz and limits the dynamic range. (For more info see extreamsd.com and their USB audio driver page.)
Good news! There are several music player applications on GooglePlay that are capable of natively recognizing the Essential DAC over USB. The difference in sound quality, volume and dynamic range is like night and day. The most polished one I've used is the paid application Onkyo HF Player. However, the free application HibyMusic also works, but has few rough edges. The Onkyo application sounds good enough for me to make finding a better DAC no longer necessary.
One WARNING on both programs and the Essential DAC - when the DAC is recognized by the programs they frequently turn the initial volume level to 100%. If you do this while you've started music playing and have the headphones on you will be in for a very rude surprise. Trust me I learned this the hard way - plug everything in with no music playing and be sure to lower the volume first.
Click to expand...
Click to collapse
Thanks for this, I was searching just today for something that would be compatible with the USB-C output and I didn't want to waste money on anything that won't work on the Essential. And I have an Onkyo receiver for my living room to boot. I wonder how the Iron Maiden flavored version of the app works? I am a Maiden fan as well. Maybe I'll try that version and report back on this thread.

A quick update. For $9.00 I figured I’d give the Google Pixel DAC a try. It only samples at 48kHz. It also provides no identifying information as to manufacturer. So it works, but the Essential DAC is superior.
For a small compact passive DAC the new Razer Phone DAC at $20 would be the one to try. It is 24bit and THX certified, but as yet untested on the Essential Phone. So it may only work on the Razer.

How do you know if the app has native support?
Sent from my PH-1 using XDA Labs

avd said:
How do you know if the app has native support?
Sent from my PH-1 using XDA Labs
Click to expand...
Click to collapse
The Onkyo program will identify the DAC and tell you the sampling modes. Both programs bring up a dialog box noting a USB device when it is plugged in.
But you have to rely on the program author and description to see if they support DACs natively.

Personally I have been using Neutron Music Player on the Play Store, and it has been working great.
I picked it up years ago on sale and downloaded it on my PH-1 to see if it added a setting to support USB DACs, and it turns out it did
However, it did not use the external DAC by default, you have to enable it in the settings. The setting was specifically under Audio Hardware, as 'Direct USB Driver' to allow direct access to the USB device. I am on Nougat and after closing and reopening the app, the background hiss/static I could hear while using the default output is now gone and my Essential USB-C DAC has been working great.

oken735 said:
Personally I have been using Neutron Music Player on the Play Store, and it has been working great.
I picked it up years ago on sale and downloaded it on my PH-1 to see if it added a setting to support USB DACs, and it turns out it did
However, it did not use the external DAC by default, you have to enable it in the settings. The setting was specifically under Audio Hardware, as 'Direct USB Driver' to allow direct access to the USB device. I am on Nougat and after closing and reopening the app, the background hiss/static I could hear while using the default output is now gone and my Essential USB-C DAC has been working great.
Click to expand...
Click to collapse
And this has a trial version, perfect. I will give it a try. After I get some files on my PH-1. Had to order a cable to connect to my PC since Essential doesn't include one! I am guessing that none of these apps work with Tidal,Spotify,Pandora etc?

chiadrum said:
And this has a trial version, perfect. I will give it a try. After I get some files on my PH-1. Had to order a cable to connect to my PC since Essential doesn't include one! I am guessing that none of these apps work with Tidal,Spotify,Pandora etc?
Click to expand...
Click to collapse
Yes a "regular" USB to USB C. Monotone had it on sale this week.
Out you can use software like synching.
Sent from my PH-1 using XDA Labs

chiadrum said:
And this has a trial version, perfect. I will give it a try. After I get some files on my PH-1. Had to order a cable to connect to my PC since Essential doesn't include one! I am guessing that none of these apps work with Tidal,Spotify,Pandora etc?
Click to expand...
Click to collapse
You can use a UPnP source, or ftp/webdav, but yea, no option to use any of those natively, without downloading the songs to local storage as far as I know
Sent from my PH-1 using Tapatalk

Initially was very disappointed with the supplied dac. I can hear static n audio breaking up. Then i realised that the issue only appear when I'm on low volume with equalizer turned on. Bumping up the volume fixed the static n breaking up issue. So my current setup is supplied dac + portable amp. The amp is to control the volume as connecting directly to the dac is too loud for my preference. It is the best sounding setup i have thus far. Sounds better than pairing my old mp3 player with the same amp. I'm using poweramp to play my songs.

oken735 said:
Personally I have been using Neutron Music Player on the Play Store, and it has been working great.
I picked it up years ago on sale and downloaded it on my PH-1 to see if it added a setting to support USB DACs, and it turns out it did
However, it did not use the external DAC by default, you have to enable it in the settings. The setting was specifically under Audio Hardware, as 'Direct USB Driver' to allow direct access to the USB device. I am on Nougat and after closing and reopening the app, the background hiss/static I could hear while using the default output is now gone and my Essential USB-C DAC has been working great.
Click to expand...
Click to collapse
I am using Neutron Trial version (which is a full version limited to 5 days) and I don't see much of a difference between its direct USB driver vs generic driver. Could you please check in the settings Audio Hardware, what is the bitrate listed? For me when I enable "Direct USB Driver" its fixing the bitrate to 48kHz, is it the same for you as well?

Has anyone tried the Essential DAC with PowerAMP? I know it supports USB DACS pretty well.

mvadu said:
I am using Neutron Trial version (which is a full version limited to 5 days) and I don't see much of a difference between its direct USB driver vs generic driver. Could you please check in the settings Audio Hardware, what is the bitrate listed? For me when I enable "Direct USB Driver" its fixing the bitrate to 48kHz, is it the same for you as well?
Click to expand...
Click to collapse
The direct USB driver, to my knowledge, is the setting that enables direct DAC driver. The generic driver is a setting that says to use a less specific version of the direct DAC driver that should work with more USB DACs. Each of these settings have submenus that you can play with that should allow you to change the format, frequency, mode, and other settings you might want.
When I have both direct USB driver and generic driver selected, my driver shows up as conexant USB audio, and my bits show up as 32, and frequency 44100. I haven't tryied to tweak the bitrate/frequency as I am happy with the sound from the stock settings with some small EQing for my headphones.

cgprats said:
Has anyone tried the Essential DAC with PowerAMP? I know it supports USB DACS pretty well.
Click to expand...
Click to collapse
I used PowerAmp for a while sound was OK, but it did not appear to be loud enough some times. also tweaking the settings, EQ, etc. seem to make it worse for me.
I had paid for Power amp back with my nexus 4 and loved the app, but it just does not sound right for me know.
Also I'm definitely not an audiophile just want to hear my music.
I have been testing Vinyl Music Player and it seems to sound better to me. This is from the Fdroid repository.
Free, No adds and no extra permissions, but no extra settings also.

oken735 said:
The direct USB driver, to my knowledge, is the setting that enables direct DAC driver. The generic driver is a setting that says to use a less specific version of the direct DAC driver that should work with more USB DACs. Each of these settings have submenus that you can play with that should allow you to change the format, frequency, mode, and other settings you might want.
When I have both direct USB driver and generic driver selected, my driver shows up as conexant USB audio, and my bits show up as 32, and frequency 44100. I haven't tryied to tweak the bitrate/frequency as I am happy with the sound from the stock settings with some small EQing for my headphones.
Click to expand...
Click to collapse
Makes sense.. Have you been able to use the headset to receive to calls while you are listening to music? I can't hear the incoming calls, and if I make a call, it goes to device speaker. Both cases it stops the music though.

mvadu said:
Makes sense.. Have you been able to use the headset to receive to calls while you are listening to music? I can't hear the incoming calls, and if I make a call, it goes to device speaker. Both cases it stops the music though.
Click to expand...
Click to collapse
I think it depends on the Rom you are running. When I was on nougat, receiving phone calls while music was playing was a crapshoot.
On Lineage OS, the few times I have received or made a call with the headphones plugged in, it worked fine, I could hear them and it came through the headphones, and it even switched to earpiece when I unplugged the adapter. :good:
I'm not sure how it is on the current official Oreo 8.1 release as I haven't used it for enough time where I would have ran into a situation where I was making or taking a call with headphones in.

cgprats said:
Has anyone tried the Essential DAC with PowerAMP? I know it supports USB DACS pretty well.
Click to expand...
Click to collapse
When I wrote this originally I tried the paid version of PowerAMP and its beta version. Neither was able to natively recognize the Essential DAC. I'd used PowerAMP for years.
I haven't bothered to try it since I switched to Onkyo HF

Maybe you want to add BlackPlayer EX to the list. I proved with the Onkyo HF Player, HibyMusic and USB Audio Player Pro and I can hardly find any significant difference.
Also I tried with the LeEco LeMax 2 headphones (the only one with usb- c port I have) and the ubs-c to 3.5mm adapter. The LeEco headphone are way much better. Better bass, better clarity, greater sharpness. Even at louder music. So, if you want to recomend a cheap but great usb-c headphones, the LeEco option is wonderful.

So glad I found this thread. we just got two essentials in the house and I am interested in some of the add-ons but really just wanted the USB to mini adapter to work a bit better.
I'd forgotten about USB audio pro, which I bought some time back for a tablet and outboard DAC.
works great with the usb-c to mini, and it lets you browse Tidal and, iirc, upnp libraries.
For those interested, just now essential is offering 3 months of Tidal for free.

Apple USB-C to 3.5mm DAC dongle and Android - remove the power limit

So I finally got fed up enough to purchase a USB-C DAC dongle to overcome the unbearable hissing noise of the inbuilt 3.5mm audio jack. The first obvious choice would be a Pixel dongle, but for some reason Apple is selling a better performing dongle. Being cheaper and available in a mortar store, it was a no brainer purchase. I can definitely say that hissing is gone and sound is crystal clear. However for yet another reason, Apple dongle is by default quite limited in power, being usable mainly by sensitive IEMs. After several attempts of various methods, I found a reliable way of removing this limit.
Ingredients needed:
1. Apple DAC dongle
2. Tasker
3. Magisk
4. AlsaMixer app (https://apkpure.com/alsamixer-root/com.skvalex.alsamixer)
Recipe:
1. Extract AlsaMixer app and locate "assets\alsa\system" folder
2. Create a Magisk module from this folder with 755/755 rights
3. Install Magisk module
4. Create a Tasker event "headphones connected", task "shell script", run as root, command "alsa_amixer -c 1 sset Headphone 120"
5. Connect Apple dongle
Voila, you suddenly moved from -40dB limit to 0db for max volume. Limit is automatically reset on each DAC re-connection, so Tasker intent is mandatory.
Verification:
1. In terminal write as root "alsa_amixer -c 1" to see the current playback limit. It obviously works only with DAC connected.
Note: this method works only for USB-C DACs, not for analog audio jack of Mi A1 phone.
Default:
Code:
# [B]alsa_amixer -c 1[/B]
Simple mixer control 'Headphone',0
Capabilities: pvolume pswitch pswitch-joined penum
Playback channels: Front Left - Front Right
Limits: Playback 0 - 120
Mono:
Front Left:[B] Playback 80 [67%] [-40.00dB][/B] [on]
Front Right:[B] Playback 80 [67%] [-40.00dB][/B] [on]
Headphones with no mic:
Code:
# [B]alsa_amixer -c 1 sset Headphone 120[/B]
Simple mixer control 'Headphone',0
Capabilities: pvolume pswitch pswitch-joined penum
Playback channels: Front Left - Front Right
Limits: Playback 0 - 120
Mono:
Front Left: [B]Playback 120 [100%] [0.00dB][/B] [on]
Front Right: [B]Playback 120 [100%] [0.00dB][/B] [on]
Headset with a mic:
Code:
# [B]alsa_amixer -c 1 sset Headset,1 120[/B]
Simple mixer control 'Headset',1
Capabilities: pvolume pswitch pswitch-joined penum
Playback channels: Front Left - Front Right
Limits: Playback 0 - 120
Mono:
Front Left: [B]Playback 120 [100%] [0.00dB][/B] [on]
Front Right: [B]Playback 120 [100%] [0.00dB][/B] [on]

--first post updated--

Why don't you use tinymix, that is included on any Android release, instead of alsa_mixer so that you don't need to install other stuff?

drizzt said:
Why don't you use tinymix, that is included on any Android release, instead of alsa_mixer so that you don't need to install other stuff?
Click to expand...
Click to collapse
Wasn't aware of this fact, thanks. Will check tinymix, but alsa seems to be much easier to use for this purpose (at least for me ).
Edit:tinymix is just too complex to use and control commands probably aren't 100% universal with all DACs, so I'll stay with ALSA and Tasker. If I wanted to utilize tinymix, I'd just use this app (Apple dongle requires special version) https://forum.xda-developers.com/pixel-2-xl/themes/pixel-2-usb-audio-control-t3704024

Hissing sound? Bro have you checked the internals of your phone? I did and I had a snake inside, after getting him out everything was fine

Yes, I have a very inteligent snake in there, which hisses only when I connect headphones and only during music playback + about 3 seconds once it stops. Also the snake is able to distinguish between sensitive low impedance IEMs and less sensitive bigger headphones, so it adjusts volume of its hissing accordingly. What's even more interesting, he keeps quiet when I connect an external DAC. I want to keep the snake, so I won't remove it from the phone.
Well, it's that or there's ****ty audio output circuit in the phone.

Fixes the PH-1 !
I came across your thread while looking for a fix for the Apple dongle when used with the Essential PH-1. The problem is when using a TRS headset with this specific dongle+phone combo the left and right channels are at significantly different volumes. A TRRS headset does not exhibit this issue.
TRRS reports Headset,1
TRS reports PCM,0
I renamed xbin to bin. Not sure if that is the right solution, but the tools were not showing up before. A quick Tasker task and it's all set!
Thank you so much!!

numanair said:
I came across your thread while looking for a fix for the Apple dongle when used with the Essential PH-1. The problem is when using a TRS headset with this specific dongle+phone combo the left and right channels are at significantly different volumes. A TRRS headset does not exhibit this issue.
TRRS reports Headset,1
TRS reports PCM,0
I renamed xbin to bin. Not sure if that is the right solution, but the tools were not showing up before. A quick Tasker task and it's all set!
Thank you so much!!
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Thanks for letting us know and I'm glad this guide helped you. Different phones can have different bin folder and also parameters for alsa-mixer, so you did the right thing.

Works on Oneplus 7 pro (Android 10). Just had to change "Headphone" to "Headset" in the alsa_amixer command.

Been trying to get a magisk module made for this on my Razer Phone 2 and it took me quite a while since I kept getting errors. I got fed up and decided to try Samsung's dongle since that surely would've been optimized for Androids, but it seems that it also had the same exact issue (go figure, Samsung practically copied Apple 100%). The Samsung dongle is the same quality as Apple's dongle for sound quality (albeit a tiny bit worse, practically unnoticeable) and also, the same volume output from the same set of earbuds at max. So back to figuring out the whole magisk module thing.
Anyways I got the issue resolved. I remade the module I had on my pc rather than doing it on the phone itself and the error magically went away, and the whole thing is working wonderfully now. Even works for the Samsung USB-C 3.5mm dongle, with a different value. 108 for the Samsung dongle rather than Apple's 120.
Thank you for posting the guide, super helpful to fix this issue for the Apple and Samsung dongles on Android in general.

Thanks for this thread. Could I use this stuff to fix my AirPods Pro with my OnePlus 7 Pro? I have to set the volume to max to hear something in the bus ;-;

cedricberger27 said:
Thanks for this thread. Could I use this stuff to fix my AirPods Pro with my OnePlus 7 Pro? I have to set the volume to max to hear something in the bus ;-;
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I'm afraid that it's not possible to control external amplifier connected over bluetooth (or at least I don't know about any way how to do it). USB-C dongle can be configured because Android sees it connected "internally" as a sound card. AirPods and similar have DAC ("sound card") in the earphones and phone can use only standard Bluetooth commands to send music and perform basic control. AFAIK, changing the gain parameters isn't among them.

kenvenin said:
Works on Oneplus 7 pro (Android 10). Just had to change "Headphone" to "Headset" in the alsa_amixer command.
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brother, i tried to make the module for my OnePlus 6 but can't get it to work. it will be great help if you please share your magisk module. thanks in advanced

Can someone upload this module here? Or maybe give some tutorial how to make a magisk module? I was searching for this, but I didn't find it.

Adamz274 said:
Can someone upload this module here? Or maybe give some tutorial how to make a magisk module? I was searching for this, but I didn't find it.
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Not sure if it's still working (I created and installed this module while on Magisk v19 and modules format changed since then), you might need to update "META-INF\com\google\android\update-binary" script with the latest version from here https://topjohnwu.github.io/Magisk/guides.html (and maybe remove "install.sh")

EU/USA Model
_mysiak_ said:
Not sure if it's still working (I created and installed this module while on Magisk v19 and modules format changed since then), you might need to update "META-INF\com\google\android\update-binary" script with the latest version from here https://topjohnwu.github.io/Magisk/guides.html (and maybe remove "install.sh")
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Maybe I misunderstood but from everything I have read, the EU version of the Apple Adapter is worse, much quieter. I thought that was in the hardware, the US version is full power.
'There are 2 versions of it, US version A2049 which could output 1v, and EU version A2155 which limited to 0.5v' from another source
https://www.reddit.com/r/headphones/comments/ecf1ud/apple_usbc_to_35mm_adapter_impressions/
Is this 'fix' able to achieve the full 1v power output on the EU Model ?

poster74 said:
Maybe I misunderstood but from everything I have read, the EU version of the Apple Adapter is worse, much quieter. I thought that was in the hardware, the US version is full power.
'There are 2 versions of it, US version A2049 which could output 1v, and EU version A2155 which limited to 0.5v' from another source
https://www.reddit.com/r/headphones/comments/ecf1ud/apple_usbc_to_35mm_adapter_impressions/
Is this 'fix' able to achieve the full 1v power output on the EU Model ?
Click to expand...
Click to collapse
As far as I know it's SW limitation, affecting mostly Android phones (not sure about Apple devices, I don't own any). My phone and dongle come from the official EU distribution, so I assume that it's the EU version. The fix definitely removes the power limit. I do not have an US dongle (or measurement device), so can't compare them though. All I can say for sure it's that with sensitive IEMs the dongle is dead silent, there is no hissing noise. At the same time, and after removing the power limit, the dongle can drive AKG K240MK2 (55ohms) cans without problems. It struggles a bit with Beyerdynamic DT990pro (250ohm) - depending on the sound source, volume can (Google music) or won't be enough (most Youtube videos).

Hi,
I appreciate you dont have meter to measure output but are you saying that this fix seems to increase the volume limit significantly ? The US version is supposed 1v against EU 0.5V.
Does this fix, 'feel' that much louder ?
_mysiak_ said:
As far as I know it's SW limitation, affecting mostly Android phones (not sure about Apple devices, I don't own any). My phone and dongle come from the official EU distribution, so I assume that it's the EU version. The fix definitely removes the power limit. I do not have an US dongle (or measurement device), so can't compare them though. All I can say for sure it's that with sensitive IEMs the dongle is dead silent, there is no hissing noise. At the same time, and after removing the power limit, the dongle can drive AKG K240MK2 (55ohms) cans without problems. It struggles a bit with Beyerdynamic DT990pro (250ohm) - depending on the sound source, volume can (Google music) or won't be enough (most Youtube videos).
Click to expand...
Click to collapse

techcolab said:
Hi,
I appreciate you dont have meter to measure output but are you saying that this fix seems to increase the volume limit significantly ? The US version is supposed 1v against EU 0.5V.
Does this fix, 'feel' that much louder ?
Click to expand...
Click to collapse
Yes, it sounds significantly louder. Dongle is pretty cheap, they might even let you try it in the mortar store, so just get ready your phone and try it with your headphones. In the "worst" case you can use it with a PC (Windows 10), there it works at full power with no "hacking" needed.

I am a novice. But I need a module and good explanation on how to DIY. Can u help me PLEASE?
I am on android 10 samsung tab s7 plus rooted. Alsa installation showing error too. Will be very helpful if u make a video of it.