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stereo to mono??

hello everyone,
I hava a t-mobile MDA compact iv (htc touch diamond) and listen to music through my earbuds often. Now i developed a deafness in one ear due to a benign tumor near my hearing nerve. Therefore when i listen to stereo music i can only use one earbud and thus miss out on one channel.
I cannot use a simple adapter jack-plug because my phone doesn't have a normal jack.
So here's my question. Is it possible to write a simple app that will combine both channels to a mono signal, so i can hear both in one ear?
I think more people would like it because they often only use one earbud to keep one ear free. I used to do that at work before i turned deaf on my right side.

http://www.google.com/search?source...o+cable&btnG=Google-søgning&meta=lr=&aq=f&oq=
these are the droids you are looking for

Thanks Rudegar,
Maybe i wasn't quit clear on this, my phone (like htc touch diamond) does not have a 3.5mm jack. It only has a mini-usb and needs the original headphones with a mini-usb connector. So thanks for the effort but these cables or adapters just won't help.
What i could do is use one adapter to go from mini-usb to 3.5mm jack, and then use another adapter (like the ones you just showed) to convert it to mono. But then i would either extend my phone by at least 2 inches or my cable would become a lot longer. That is a solution of course but not very practical. I have looked into these options and in my opinion an app like i asked about would be the most practical solution. So, if anyone can help. please...

it don't have a pure miniUSB converter it have extUSB
which is usb pins plus normal audio pins all extUsb -> 3.5mm converters work
http://www.google.com/search?source...inijack&btnG=Google-søgning&meta=lr=&aq=f&oq=

Thanks again Rudegar, but i'd rather have a small app to do the trick. I think it must be possible, just don't know how. So if anybody can help.

tpereboom said:
Thanks again Rudegar, but i'd rather have a small app to do the trick. I think it must be possible, just don't know how. So if anybody can help.
Click to expand...
Click to collapse
Not sure of any specific PPC application to do what you want but instead of say having an adapter you could just batch recode your music to mono before transfer to phone many freeware apps on the market to do this.

Coreplayer allows you to play your music in mono. Go to Tools\Settings\Audio and set 'Stereo mode' to 'Mono Join'

thanx, i'll try that.

Need help getting a perfect audio recording on my SGS4G

Im asking all you guys to help me find best methods, settings, and tweaks to get the best possible audio recordings on my SGS4G. Im asking this not only from the devs here but from all the audiophiles as well.
The reason im starting this thread is that my partners iphone 4 just with the built in mic and camera has produced video and audio recordings 10x better then what this phone has. With great dynamic quality and no distortion or anything. I need broadcast quality recordings for this project to succeed. If i am not able to do so im either going to have to try to clone the SIM card and get a used iphone 3GS just for field work, or give up this phone and switch to an iphone 4. Either of which i really dont want to do. If part of the solution is to dump GB and go back to Froyo, then so be it.
Heres what i got:
1. Highly modded SGS4G with Valhalla 1.3.2, Launcher Pro Plus
2. 32GB class 4 Sandisk card
3. UV using the settings in the ICBINB therad (i tried some lower ones dsexton posted, but they made the phone very unstable)
4. Voodoo Plus sound app
5. i-Microphone (sound was horrible, more on this later) http://www.amazon.com/o/ASIN/B004XC6KHS/ref=nosim/betteraddons-20
6. Sennheiser E835 with XLR to 3.5 mono minijack adapter
7. Rec Forge and Hi-Q MP3 recorder (trying both, if you know of any with more features please share)
First off, im concerned that the custom ROM, kernal, and UV settings may be affecting quality. Any input on this would be appreciated. Ive tried OC, but 1.2ghz was never stable and 1.3ghz drained the battery too much.
I first off was looking for a good solution for face to face interviews, i found the i-mic (link above) to have good reviews, but when i bought it and tried it out, the recordings were horrible! Like someone was rubbing their fingers over the mic when talking. I tried gain adjustments in Voodoo and the recording apps im trying out, but nothing helped.
I plugged in my new Sennheiser using a XLR to RCA cable, with a RCA to mini jack adapter. The sound is A LOT better, but still there is a humming over the recordings, and they just do not have the dynamic quality that im hearing with the iphone recordings.
Are there any equalizer and sound processing apps for commercial or professional audio work out there?
Im at a wall here, any help to these issues would be greatly appreciated. Thanks in advance.

It's hard to tell exactly without seeing your set-up but it sounds like you have the following issue.
The XLR is a balanced connector. When you go to an RCA you are dropping down to an unbalanced connector and losing your ground. That is where the hum would stem from.
To eliminate the hum you would need a cable that converts directly from your balanced XLR to a balanced T/R/S (Tip, Ring Sleeve) mini jack. This mini jack has 3 separate contact points, separated by two plastic bands on the plug instead of one.
Ideally for broadcast quality you would need to run your Sennheiser E835 into some sort of mixer with a mic preamp. Then run the line level out from the mixer to the SGS4G. Your recordings would be crystal clear at this point.
I don't believe your issue is with the SGS4G hardware. I use the camcorder with the built in mic all the time and the audio quality is fine.
Hope this helps.

you don't need a balanced connection unless you are talking about long mic cables like over 5 feet long and equipment that is plugged into AC current. Balanced connections are for getting rid of the 60 cycle AC hum, basically.
If I was trying to record using a 4g I would think about using the usb input and some kind of analog to digital converter box. Here is a cheap one -- $25 behringer UCA 202 providing 2 RCA inputs-- it's about the size of a phone. and supposed to work on linux without drivers so maybe it will work on android. I have three of them and use them for laptops. They're pretty good at eliminating noise. I just don't know if the phone has enough power to operate the unit. You need a female to female standard usb adapter to connect the data cable to the converter and something to adapt a (short) mic cable to an RCA port. if it works you can use a dynamic mic like a AKG or Shure or some smaller dynamic mic and will get better recordings than anything built into any phone. It will be a little bit bulky but you'll still be able to fit the whole thing in your pocket. I should try it with my phone and see if it works but I need to get the female to female adapter. if the phone recognizes the UCA202 it should work just fine with a Sennheiser E835. My girlfriend uses a Sennheiser MD-431 for recording songs with her laptop and one of those units.
They also have usb mic adapters at places like guitar center. If you have the female to female USB connector you can take your 4g to guitar center or wherever and try their mics out before you buy anything.

@Nazcalito....great advice, I guess spending all my time on a control room board I hear the word 'hum' and immediately think 'where's the dirty gear, who's missing a direct box.' Haven't used a cable under 10ft in as many years. I'd be very interested to know if someone could get the USB audio/phone rig cooking on or s4g, that would be sweet.
Sent from my SGH-T959V

Thanks for all the responses, ive been playing around with this and i do think the hardware is the biggest issue. I noticed the issue im having is that the built in mic is not turning off when using an external one. When using the external mic, i can tap over the back mic and get the feedback from it as well as the audio from the external mic.
Now the built in 3.5mm jack is a four contact TRRS plug, the RCA to minijack adapter is only two contacts. This would explain why the little plug in mic was getting all the feedback. Though even that mini i-mic was a TRRS plug like the headset thats included with the SGS4G. Why is the built in mic not turning off?
Nazcalito, your suggestion of the USB audio interface may work, i did consider a microphone with a USB connection, though i could not find any accounts of this working by simply plugging the mic in to the phone with a USB to microUSB adapter, and didnt want to take the chance. Though i like the converter box you showed a pic of, i could just velcro it to the back of the phone to make a mobile unit. I'll probably buy one if youre able to confirm it works. Again would i have the same issue with the internal mic not turning off when using this?
One thing i ordered was something called the headset buddy, its a TRRS male plug that splits into two separate minijacks for headphone and microphone. Im hoping this will solve the problem.
http://www.amazon.com/o/ASIN/B002SK66OY/ref=nosim/betteraddons-20
Another concern is the pinout of the SGS4G. Ive found diagrams for the i9000 that shows the mic and ground contacts swapped, and others with the regular mic as the last pin that claim they are for the Galaxy S2 and SGS4G. Anyone can confirm? This might explain the internal mic staying on.
http://pinoutsguide.com/CellularPhones-P-W/samsung_galaxy_headset_pinout.shtml
http://pinoutsguide.com/HeadsetsHeadphones/samsung_i9100_headset_pinout.shtml
As well should i have all the options in Voodoo turned on for this?

Ya know, i wish i didnt order the headset buddy already, i would have tried this:
http://www.kvconnection.com/product-p/km-droid-x43.htm

Caligula36 said:
Ya know, i wish i didnt order the headset buddy already, i would have tried this:
http://www.kvconnection.com/product-p/km-droid-x43.htm
Click to expand...
Click to collapse
That looks like a very handy piece of gear.

Bump
Sent from my SGH-T959V using XDA App

The adapter did not help, the internal mic is still staying on.

That's not good. I have a similar problem occasionally with headphones not muting the speaker when used...I have to wiggle the plug a little until it mutes. The contacts are definitely a little touchy.
Sent from my SGH-T959V

Can anyone with a stock froyo SGS4G try plugging in an external mic and see if that solves it?

Finally fixed bluetooth in the car while using the AUX IN jack

Tonight I made my first accessory purchase at the local Verizon store... as their prices have always been pretty bad, but I have a military discount of 15%, so I bit the bullet and purchased an iBolt cradle system. If you haven't seen it, there is a review in the accessory section, it's pretty spot on, but this important update is for those of us who don't have A2DP streaming in the car, and are forced to use the AUX IN jack.
Long story short, when using this dock, you have the option of sending the sound thru your micro USB port or out the phones speaker in back. This dock comes with a nine foot long cable that has micro USB at one end, and regular USB and a 3.5mm audio jack at the other. This beautiful setup allows you to not touch the evil headphone jack (trump card) on the phone, but rather it lets you the phone play music out the USB connection while retaining Bluetooth phone connectivity thru your cars Bluetooth connection! (while charging)
Silly that I had to buy a $32 device to get functionality that the AT&T version of our phone has natively... but at least it's fixed!

Not trying to be a jerk or anything, but what is the advantage of playing music through the USB instead of bluetooth? I actually like the BT option - plays music but pauses when a call come in and lowers the volume for GPS directions. Works great all at the same time...
Sent from my SCH-I535 using xda app-developers app

OnceAMatrixMan said:
Not trying to be a jerk or anything, but what is the advantage of playing music through the USB instead of bluetooth? I actually like the BT option - plays music but pauses when a call come in and lowers the volume for GPS directions. Works great all at the same time...
Sent from my SCH-I535 using xda app-developers app
Click to expand...
Click to collapse
There's a large portion of G3 owners who do not have bluetooth streaming (A2DP). Just because you have bluetooth phone connectivity does not mean you have bluetooth streaming. We are forced to use the aux in jack in the car to listen to music. I think a large portion of S3 owners simply tried to use the headphones jack on the phone... But if you do that, you cannot use bluetooth. Every sound is routed thru the headphones jack. You cannot toggle this.
So, using the iBolt cradle, witch ports the sound out via usb instead of the headphones jack, I am able to retain my cars bluetooth functionality.
Side note, not sure if you know this, but the sound quality of bluetooth streamed music is pretty bad compared to a cabled connection.
Sent from my big red Samsung Galaxy S3 using XDA Premium.

mdt73 said:
There's a large portion of G3 owners who do not have bluetooth streaming (A2DP). Just because you have bluetooth phone connectivity does not mean you have bluetooth streaming. We are forced to use the aux in jack in the car to listen to music. I think a large portion of S3 owners simply tried to use the headphones jack on the phone... But if you do that, you cannot use bluetooth. Every sound is routed thru the headphones jack. You cannot toggle this.
So, using the iBolt cradle, witch ports the sound out via usb instead of the headphones jack, I am able to retain my cars bluetooth functionality.
Side note, not sure if you know this, but the sound quality of bluetooth streamed music is pretty bad compared to a cabled connection.
Sent from my big red Samsung Galaxy S3 using XDA Premium.
Click to expand...
Click to collapse
I'd recommend this if you don't have BT streaming: http://www.monoprice.com/products/p...=10827&cs_id=1082704&p_id=9472&seq=1&format=2
That combined with a USB car charger to keep it charged at all times would maybe be a nice way to solve your issue for ~$30
Note: I don't own the product, but the reviews are good and it seems it would just be nice to have.

con247 said:
I'd recommend this if you don't have BT streaming: http://www.monoprice.com/products/p...=10827&cs_id=1082704&p_id=9472&seq=1&format=2
That combined with a USB car charger to keep it charged at all times would maybe be a nice way to solve your issue for ~$30
Note: I don't own the product, but the reviews are good and it seems it would just be nice to have.
Click to expand...
Click to collapse
A day after I purchased the iBolt I received this little gadget in the mail from ebay.
USB Bluetooth Adapter
For under $10 it gives you the same A2DP bluetooth audio streaming. But, the difference is it doesn't sound nearly as good for the lower end of the spectrum. But, in a pinch it's awesome, and for the price, you can't beat it. I have it as a backup for now.
I took about 30 min and hid the iBolt cabling today. I like the fact that I moved the cradle to the top left of the windshield, away from the center console. Will post some pics later today of the install.

I am surprised at how easy the phone is to use with my left hand, from the steering wheel. Retaining the bluetooth functionality, specificallly my integrated microphone, really makes this work around worth every penny. Hope it helps someone else!

Oh well now I understand. Thanks for clarifying. Of course I didn't mean any offense.
Sent from my SCH-I535 using xda app-developers app

OnceAMatrixMan said:
Oh well now I understand. Thanks for clarifying. Of course I didn't mean any offense.
Sent from my SCH-I535 using xda app-developers app
Click to expand...
Click to collapse
No worries, none taken. I am just ecstatic to be playing music via S3 thru my car stereo and still be able to use the cars bluetooth for phone calls! Now if we could come up with a fix for this damn NO SIM error, I would be in heaven. LOL!

Can you post the dock and where you got it?

tu3218 said:
Can you post the dock and where you got it?
Click to expand...
Click to collapse
The OP mentioned they bought it from the Verizon store and that it was discussed in the Accessories thread:
http://forum.xda-developers.com/showthread.php?t=1806888&highlight=ibolt
- ooofest

Sweet, I was contemplating a bluetooth to 3.5mm for my car because of this issue, but this might be a better solution. Looks like we might have the same exact setup soon including the mini cooper :good:

I-bolt rocks. Bought one the other day. Search for best price. Down in the low to mid $30 range now depending on shipping and coupons.

Could anybody solve my problem? My car doesn't have a usb port so I cant use the iBolt to play music through it. I use the cassette player to audio jack and use bluetooth talk through my car speakers. Is there a solution to use bluetooth while using the audio jack?

rlatjs17 said:
Could anybody solve my problem? My car doesn't have a usb port so I cant use the iBolt to play music through it. I use the cassette player to audio jack and use bluetooth talk through my car speakers. Is there a solution to use bluetooth while using the audio jack?
Click to expand...
Click to collapse
Yes. I don't know why I didn't think of this sooner, but on anther board, someone brought this up and it works, albeit ghetto'ish.
Mount the phone somewhere in the car where you can speak towards the mic. Plug the cassette tape adapter into the headphones jack. When a call comes in, just answer the phone keeping the headphone jack in use, and the sound will come thru your stereo, but the mic you will be using is the one on the phone. Talked to multiple people who all heard me just fine. (even with the mic pointed downwards!)

tb311 said:
Sweet, I was contemplating a bluetooth to 3.5mm for my car because of this issue, but this might be a better solution. Looks like we might have the same exact setup soon including the mini cooper :good:
Click to expand...
Click to collapse
The cable is exactly the right length to mount the ibolt anywhere in the car, hell I think we could mount it on the rear window, lol! There is space behind the base of the center console where you can tuck away any extra cable you have before you route the cable to the jacks. I decided to use an add on 2.1a USB car charger (cig lighter adapter) vs the cars internal USB as I don't think the MINI USB pumps out anything more than 450 mA (1\4 what the adapter puts out I bought seperately)
PowerGen Dual USB Port 2A 10w (fast) Heavy Duty Ouput Car Charger - White

Guys great news rls8 hybrid fixed this issue. Instead of buying a $ 40 accessory , donate a 20 to the dev

jmichaels1982 said:
Guys great news rls8 hybrid fixed this issue. Instead of buying a $ 40 accessory , donate a 20 to the dev
Click to expand...
Click to collapse
Does that require a custom Recovery and/or ROM, perhaps? I'd like to keep things relatively stock for now, though am OK with tweaks. Plus, the iBolt looks convenient to use in my car.
- ooofest

mdt73 said:
There's a large portion of G3 owners who do not have bluetooth streaming (A2DP). Just because you have bluetooth phone connectivity does not mean you have bluetooth streaming. We are forced to use the aux in jack in the car to listen to music. I think a large portion of S3 owners simply tried to use the headphones jack on the phone... But if you do that, you cannot use bluetooth. Every sound is routed thru the headphones jack. You cannot toggle this.
So, using the iBolt cradle, witch ports the sound out via usb instead of the headphones jack, I am able to retain my cars bluetooth functionality.
Side note, not sure if you know this, but the sound quality of bluetooth streamed music is pretty bad compared to a cabled connection.
Sent from my big red Samsung Galaxy S3 using XDA Premium.
Click to expand...
Click to collapse
So how do you know if you have bluetooth streaming? aren't all the G3's the same in that respect? Or is it up to what your car can do?

Yes and unlcked bootloader

mdt73 said:
Yes. I don't know why I didn't think of this sooner, but on anther board, someone brought this up and it works, albeit ghetto'ish.
Mount the phone somewhere in the car where you can speak towards the mic. Plug the cassette tape adapter into the headphones jack. When a call comes in, just answer the phone keeping the headphone jack in use, and the sound will come thru your stereo, but the mic you will be using is the one on the phone. Talked to multiple people who all heard me just fine. (even with the mic pointed downwards!)
Click to expand...
Click to collapse
I know I can do that but I want to use the bluetooth in my car to make calls(my car doesn't have bluetooth audio only calls). When I use the headphone jack to make calls people say their voice echoes back but if I use the cars bluetooth its fine.

[Q] Stream cam to droid?

OK so I picked up a cheap backup cam that I want to put on the back of my truck. I would like to make it stream to my phone. My thought is to get a bluetooth transmitter to attachto the cam and have it stream to my phone via BT. Is this possible? If so does anyone know of a BT transmitter that operates on 12v and that I could hook the cam to? I think the cam has an RCA output and I know you can get an RCA to 3.5mm jack adaptor to plug into a BT transmitter. What are your guys' thoughts?

Good luck with that one.
LCD screens can be found for pretty cheap if you can't find a BT solution. Personally, I think a dedicated LCD screen would be more convenient then making sure you have your phone out where you can see it and opened up to the proper app.

Actually I have a car docking station that I usually always have my phone in when I'm in the truck so the phone is usually where I can see it. I had hoped I could set up an app in such a way that it would automatically launch when it gets the bluetooth signal. Yeah probably dreaming but thought this would be a good place to ask. Figured if anybody know how to do this someone on here would.

Bluetooth calling options for car?

I've read a lot about options for getting bluetooth audio in the car, and even started a thread on it. But after thinking about it more, I realized that if I was going to have bluetooth audio in the car, I might as well be able to take calls in the car, as well. I tried the Belkin adapter, and it's great for receiving music and calls, but the sound from my end on calls is disappointing. I've called people from it and also have left myself voicemails and listened to them, and it just doesn't sound very good.
Any advice on bluetooth for the car that has good call audio? Been considering maybe this GoGroove one. Also, this Kinivo doesn't look too bad.

It's a bit more expensive than those options and doesn't work with every vehicle but I just put a grom audio adapter in my honda pilot. It pretends to be a cd changer, I got the box with aux in, usb and bluetooth capability then added on the Bluetooth module and auxillary in+charging cable and it ended up being like 200 shipped. At the cheapest end you could get the box that just does bluetooth and aux for 74.99 then add on the bluetooth for 49.99 (the box comes with bluetooth capability but the actual bluetooth module is an addon). You mount the microphone where you cant it and plug the box into the back of the radio. It works well for me and everyone can hear me just fine... well everyone except my dad but he's been going deaf for years now.

flu13 said:
I've read a lot about options for getting bluetooth audio in the car, and even started a thread on it. But after thinking about it more, I realized that if I was going to have bluetooth audio in the car, I might as well be able to take calls in the car, as well. I tried the Belkin adapter, and it's great for receiving music and calls, but the sound from my end on calls is disappointing. I've called people from it and also have left myself voicemails and listened to them, and it just doesn't sound very good.
Any advice on bluetooth for the car that has good call audio? Been considering maybe this GoGroove one. Also, this Kinivo doesn't look too bad.
Click to expand...
Click to collapse
Gogroove is good

diljosh said:
Gogroove is good
Click to expand...
Click to collapse
Yeah? How is call quality? Do you have to turn on or pair or connect it every time you get in the car?

BOOM:
http://www.amazon.com/Kinivo-BTC450...Input/dp/B009NLTW60/ref=pd_rhf_dp_s_cp_1_2JMS

wavrunrx said:
BOOM:
http://www.amazon.com/Kinivo-BTC450...Input/dp/B009NLTW60/ref=pd_rhf_dp_s_cp_1_2JMS
Click to expand...
Click to collapse
Can you elaborate? You have this one? It is one of the two I was considering. How is call quality?

i dont own it yet but am probabally going to order it on monday.
my car already has bluetooth built in, but i like the fact this adapter supports aptX, and has a built in USB port.
so anyway, i cant elaborate :/
**edit
what is the other one you were considering ?
can you share with us ?

wavrunrx said:
i dont own it yet but am probabally going to order it on monday.
my car already has bluetooth built in, but i like the fact this adapter supports aptX, and has a built in USB port.
so anyway, i cant elaborate :/
**edit
what is the other one you were considering ?
can you share with us ?
Click to expand...
Click to collapse
I can speak for it, I own it (bought it last week)
Syncs up quick, Unlike the similar Belkin (looks better, has issues) the buttons are useful, the big center area is a giant play/pause button, it also has a foward\back button on one side. Call quality is great, have had no complaints when using it, streams music well. Very simple setup.
The only thing I don't like is the cable is permanently attached and very thin/fragile. This isn't an issue if you properly mount/set it up (IE hide it behind plastic panels)
The charger doesn't put out much, I believe around 700mA, and it does take up my one and only 12v jack meaning I can't easily use a better phone charger without hardwiring something.

wavrunrx said:
**edit
what is the other one you were considering ?
can you share with us ?
Click to expand...
Click to collapse
Links are in the OP.

Cast|el said:
The charger doesn't put out much, I believe around 700mA, and it does take up my one and only 12v jack meaning I can't easily use a better phone charger without hardwiring something.
Click to expand...
Click to collapse
There's always this.

Just bought a new car 2 months ago. It has no bluetooth and I was tired of my fm adapter so I was looking for a new solution. Considered everything from 600$ full CD player replacements that had bluetooth enabled to some of the more internal installation ones around 150. Ended up going with the Kinvio off Amazon just to try it and see how well it works.
Here is what makes it 10x better then the Belkin: Autoconnect. When you turn your car on it turns on and your phone automatically connects. With the Belkin apparently you have to hit the button every time you want to connect.
I've been told the audio quality is good and while people know im on speakerphone they can hear me clearly. The audio quality for me is great, I'm not an audiophile but it certainly seems clear to me. Would definitely recommend it for the price.

I put a bluefusion unit in my truck and loved it. It plugged in behind the radio, install took about thirty minutes. It still allowed use of my steering wheel controls. It tricked the radio into thinking the Bluetooth was xm..... retails for over $200 but are for sale all over the net for $40-60.
Sent from my SCH-I545 using xda app-developers app

dzags said:
Just bought a new car 2 months ago. It has no bluetooth and I was tired of my fm adapter so I was looking for a new solution. Considered everything from 600$ full CD player replacements that had bluetooth enabled to some of the more internal installation ones around 150. Ended up going with the Kinvio off Amazon just to try it and see how well it works.
Here is what makes it 10x better then the Belkin: Autoconnect. When you turn your car on it turns on and your phone automatically connects. With the Belkin apparently you have to hit the button every time you want to connect.
I've been told the audio quality is good and while people know im on speakerphone they can hear me clearly. The audio quality for me is great, I'm not an audiophile but it certainly seems clear to me. Would definitely recommend it for the price.
Click to expand...
Click to collapse
so am i correct in my thinking:
1) pair my phone with the Kinovo
2) Music (from google music) will go out TO my microsoft SYNC system VIA Line OUT FROM the Kinovo
3) Phone calls, incoming/outgoing, will go TO my microsoft SYNC system VIA bluetooth FROM the Kinovo ((instead of LINE out! so i can still take advantage of answering calls from my steering wheel and seeing names on the cars LCD etc ...)

Alright, I'm giving the Kinivo a try.