FM Modulation as an app? - General Questions and Answers

I'm not a programmer, and don't even begin to know if this is possible so I thought I'd raise the discussion with those of you that do.
If the Bluetooth radio can be used as an FM receiver could it not be also used as a FM transmitter? If this is possible, I would think that a FM Modulator app could be a lucrative endeavor for one of you who are capable of creating such a thing.
Let me know your thoughts. I'm interested in hearing the possibilities.

this would be cool for the users that dont have upto date car stereo or home stereos. and no aux leads

Related

Why FM Radio can not route sound to BT A2DP?

I know that 98MHz FM Radio needs a somewhat long antenna but I can not see why that antenna should hang from my ears and tangle around my neck!
It makes me mad I can not route FM radio output sound to my bluetooth A2DP headset as I can do with audio players.
If HTC is so dumb someone should find a solution!
oruam57 said:
I know that 98MHz FM Radio needs a somewhat long antenna but I can not see why that antenna should hang from my ears and tangle around my neck!
It makes me mad I can not route FM radio output sound to my bluetooth A2DP headset as I can do with audio players.
If HTC is so dumb someone should find a solution!
Click to expand...
Click to collapse
Sony Ericsson's radio requires wired headset as antenna too. I gueess this is the norm, but, agree with you that it should be improved.
I agree. There should be a way to connect a pure antenna to the phone and route the sound to the phones speaker or to wireless speakers.
That pure antenna could be a simple fairly long piece of wire or it might be a solid short but high performing radio-antenna.
It really doesn't matter... if the radio waves of the antenna won't kill you, then the Bluetooth will do the job... either way you're f*cked whith cancer...
Also using the headset as an antenna is common practice (Nokia, Motorola, SE, Siemens,...)... you're not gonna see anything new until the backgound technology of commercial Radios will change...
gnick666 said:
Also using the headset as an antenna is common practice (Nokia, Motorola, SE, Siemens,...)...
Click to expand...
Click to collapse
Ok, dumbness is a common practice. So what?
gnick666 said:
you're not gonna see anything new until the backgound technology of commercial Radios will change...
Click to expand...
Click to collapse
No new technology is required.
No (sensible) people expect a micro antenna for 98 MHz, a 50 cm piece of wire is completely acceptable.
What is required a little less dumbly written piece of software that can route the audio output (obtained using the 50 cm piece of wire pending from, let's say, my back) to the A2DP headset.

What's the best way to get my phone audio into my car?

I'd like to experiment with streaming audio from my G1 (dream) into my car somehow.
I have a radio/tape/cd deck.
I was looking at these bluetooth FM transmitting items on eBay but I get bad vibes from them generally:
http://cgi.ebay.com/NEW-CAR-MP3-FM-...ries?hash=item3a531634af&_trksid=p3286.c0.m14
http://cgi.ebay.com/3in1-Car-MP3-FM...ries?hash=item563244e32c&_trksid=p3286.c0.m14
http://cgi.ebay.com/2-4G-BLUETOOTH-...ries?hash=item4a9b12b3fb&_trksid=p3286.c0.m14
I don't want to make calls or anything, I just wanna listen to music without installing a new deck or anything.
Any advice or thoughts would be appreciated.
I got both a
FM transmitting from belkin
and a
normal 3.5mm to tapedeck adaptor
both does the job just fine
I have already mentioned this device in other posts asking similar questions and don't want to appear to be promoting or advertizing for one product; however, I truly love this device for streaming audio to my car stereo. The Motorola BT 505 is a wonderful device that works flawlessly for me. Audio is streamed via bluetooth from my PPC to the Motorola device and sent using a powerful -* And I mean Powerful * fm transmitter to my car stereo. I have had for almost 2 years now and have yet to have any problems or complaints. The rechargeable battery lasts for weeks between charges - even longer depending on how much you use it - I use every day- and still battery life is excellent. The FM Transmitter is powerful enough to overpower even my local radio stations so I get no static at all when using. Only thing that can interupt it is some satelite radio fm transmitters from other people's cars which some are more powerful. Very rare though to experience static. - It can also be used while it is charging I discovered unlike some bluetooth devices.
The tapedeck converter is working fine, it's ugly and a bunch of cords, but it sounds great.
Moto T505 ROKR

[TODO] Enable FM Transmitter

The combined WLAN / Bluetooth / FM chip in the Defy ( WL1271 ) is able
to not only receive FM Radio, it can also transmit Audio !
Both solutions support Bluetooth specification v2.1 + EDR, and provide FM transmit and receive functions to turn the handset into a personal area broadcast device.
Click to expand...
Click to collapse
http://focus.ti.com/general/docs/wt...993&DCMP=WTBU&HQS=ProductBulletin+OT+wilink_6
So another locked feature that would make the Defy even better.
This thread is to collect informations that could help to enable it.
I always wondered why nokia is the only company (I know of anyway) that puts FM transmitters in their phones.
It is such a good way to listen to your music in unfamiliar places like friends house, rental cars, work cars.
This would be awesome to see working!!
-={antibyte}=- said:
The combined WLAN / Bluetooth / FM chip in the Defy ( WL1271 ) is able
to not only receive FM Radio, it can also transmit Audio !
http://focus.ti.com/general/docs/wt...993&DCMP=WTBU&HQS=ProductBulletin+OT+wilink_6
So another locked feature that would make the Defy even better.
This thread is to collect informations that could help to enable it.
Click to expand...
Click to collapse
I know this will be the dumbest question to ask, but can we also use it with mic and speaker for it to make it work like a two way communication device. Eg; police radios
In my opinion:
everybody must wait for the motorola that they would open the bootloader for the developers who will write the necessery drivers... like the 720p record and touch to focus
AtomCity said:
In my opinion:
everybody must wait for the motorola that they would open the bootloader for the developers who will write the necessery drivers... like the 720p record and touch to focus
Click to expand...
Click to collapse
And continous-autofocus video recording? xD
Nokia N86 have special internal antenna for FM Transmitter.
Wow, this would be awesome if you got it to work. The one thing is miss from my old SE w980
Sent from my Defy
Interesting...
Aerial
1806 said:
Nokia N86 have special internal antenna for FM Transmitter.
Click to expand...
Click to collapse
I think you have hit the nail on the head there. unless the defy has suitable aerial which i doubt because you have to use headphone cable for the aerial.Might be wrong thought. hope i am because this was a great feature of nokia's
its posible FM transsmisor on Defy ???
insestito said:
its posible FM transsmisor on Defy ???
Click to expand...
Click to collapse
It's hard to tell.
There is no datasheet and the drivers are closed source.
If the chip does not require additional circuitry for the transmitter,
then there is a chance to get it working.
As antenna you could just cut the cable from an old headset and plug it in
while transmitting, if the same antenna is used for receiver and transmitter.
chaihg said:
I know this will be the dumbest question to ask, but can we also use it with mic and speaker for it to make it work like a two way communication device. Eg; police radios
Click to expand...
Click to collapse
I think in theory this could be possible.
But as the range of the transmitter is max 10-20 meter, this would be
very limited
Maybe from one room to the other.
-={antibyte}=- said:
I think in theory this could be possible.
But as the range of the transmitter is max 10-20 meter, this would be
very limited
Maybe from one room to the other.
Click to expand...
Click to collapse
Yayy, feels good to know i can think electronics thanks.
so.... if defy have an internal antena, i can listen the radio via bluetooth?
It could be a very nice car kit for the people they don't have bluetooth inside.
n7650_fun said:
It could be a very nice car kit for the people they don't have bluetooth inside.
Click to expand...
Click to collapse
If you don't care about others listening to your conversation while you are in a traffic jam . It's OK for music but i would never use it for conversations.
The defy would be one hell of a phone if you could get it to work, and the one/ones behind it one hell of a developer. At least to me. Can't understand how you guys discover everything and a few days later you show up with new stuff to play around with.
Is there anything you cant do with the Defy?
Crazy phone, freeking unbelivable talented developers!
Sent from my Defy
-={antibyte}=- said:
It's hard to tell.
There is no datasheet and the drivers are closed source.
If the chip does not require additional circuitry for the transmitter,
then there is a chance to get it working.
As antenna you could just cut the cable from an old headset and plug it in
while transmitting, if the same antenna is used for receiver and transmitter.
Click to expand...
Click to collapse
The transmitting antenna has to be a tunned length known as the SWR (standing wave ratio).The length of the antenna is extremely critical.
If a driver enabled the transmitter , but the was no antenna present irreversible damage could be coursed to the hardware.
The antenna will be internal.if the is one.
7iain7 said:
The transmitting antenna has to be a tunned length known as the SWR (standing wave ratio).The length of the antenna is extremely critical.
If a driver enabled the transmitter , but the was no antenna present irreversible damage could be coursed to the hardware.
The antenna will be internal.if the is one.
Click to expand...
Click to collapse
That is basicaly true, but those transmitters are only allowed to have some nanowatt (in most countries) . I think its rather unlikely an untuned antenna would break the output stage at this energy level. But i am not shure
But anyway, after reading some infos about the chip it looks like it has a seperate Antenna output for the transmitter that needs to be connected.
It seems unlike the Bluetooth part, audio cannot be send to the transmitter over any data path. It has to be connected to dedicated analog or digital (I2S) audio inputs. So the only way this could work at all is that Motorola connected all needed lines and just did not add software support.
I dont know how likely this scenario is ...
The transmitter is normaly controlled over the Blutooth interface via HCI.
Commands can be found here:
http://wiki.lsr.com/GetFile.aspx?File=/SWRU193G - Bluetooth Vendor Specific HCI Commands.pdf
This would be the first.app I pay for.
Sent from my SGH-T959 using XDA App

Transmitter of any kind (bluetooth or FM)

I know the phone has a fm tuner in it. is there any way to transmit from the phone to say the radio in my car without having to use an adapter. I was asked at work today by a coworker if there is anyway to stream. I use tune in radio or pandora to listen to most of the music i like but i have not ever thought about trying to get the phone to output it to my car. This would be really cool if possible. Does anyone know if there is a way either harware or software to make it work?
Thanks,
Joe
asadjewonxmas said:
I know the phone has a fm tuner in it. is there any way to transmit from the phone to say the radio in my car without having to use an adapter. I was asked at work today by a coworker if there is anyway to stream. I use tune in radio or pandora to listen to most of the music i like but i have not ever thought about trying to get the phone to output it to my car. This would be really cool if possible. Does anyone know if there is a way either harware or software to make it work?
Thanks,
Joe
Click to expand...
Click to collapse
As you note, it's an FM tuner, not a transmitter. I use the Bluetooth ADP profile to output audio to my car. If you don't have bluetooth builtin to your car stereo, but do have a line-in jack, you can use something like this to pick up the audio signal from your phone and transmit it to your car. I have one, and it sounds great!
thats what i thought but it never hurts to ask.
Thanks,
why not just use an AUX cable? seems to be the same concept and with out less static... those transmitters transfer alot of static too.
Im sure if your car has bluetooth A2DP streaming is available. i have it, but i just use the AUX less batter drain
Optimus-Prime said:
why not just use an AUX cable? seems to be the same concept and with out less static... those transmitters transfer alot of static too.
Im sure if your car has bluetooth A2DP streaming is available. i have it, but i just use the AUX less batter drain
Click to expand...
Click to collapse
The Bluetooth receiver I previously posted has always been static free.
but with an aux cable you get less battery drain and you use the hifi wolfson headphone amp/ultra low power audio codec (assuming you use the headphone jack and not the car dock which uses usb audio converted by a probably lesser codec/amp than the one the phone is equipped with)
also since when do we have an fm tuner? i dont see an fm radio app?
Dani897 said:
but with an aux cable you get less battery drain and you use the hifi wolfson headphone amp/ultra low power audio codec (assuming you use the headphone jack and not the car dock which uses usb audio converted by a probably lesser codec/amp than the one the phone is equipped with)
also since when do we have an fm tuner? i dont see an fm radio app?
Click to expand...
Click to collapse
fm tuner is in the chipset
http://www.broadcom.com/products/Wireless-LAN/802.11-Wireless-LAN-Solutions/BCM4330
drowningchild said:
fm tuner is in the chipset
http://www.broadcom.com/products/Wireless-LAN/802.11-Wireless-LAN-Solutions/BCM4330
Click to expand...
Click to collapse
hmmm, that is the wifi chip. ok there might be potential as the chip works as a transmitter for wifi frequencies. but it may only work as a reciever on fm frequencies. it may be more plauible to use this as fm radio than the phones that have fm support in the gps chip though.
edit:
looked at the link and it describes is as a transciever, this might be posible, not sure if it is plausible. id imagine it would need a great kernel dev. without full documentation it is hard to tell if there needs to be supporting hardware like an external signal amplifier, i also doubt we have an fm antenna but it might not be too hard to add. but it does seem that we have atleast part of the equation here and the concept of an integrated fm transmitter for your car radio would be really cool.
Dani897 said:
hmmm, that is the wifi chip. ok there might be potential as the chip works as a transmitter for wifi frequencies. but it may only work as a reciever on fm frequencies. it may be more plauible to use this as fm radio than the phones that have fm support in the gps chip though.
looked at the link and it describes is as a transciever, this might be posible, not sure if it is plausible. id imagine it would need a great kernel dev.
Click to expand...
Click to collapse
its a multi chip wifi/BT/fm
the galaxy s2 has the same chip

FM Transmitter / Charger

So my car doesn't have an AUX input, Bluetooth or cassette, so I am looking for a good FM Transmitter / charger for the One X. Does anybody have any suggestions or anything they have used?
I have a new potato, Google that. I can't speak for the fm function because I use the aux from it but it does have an fm function. Only thing is that it is $100
The bummer about FM Transmitters is a few years back the FCC decided that FM transmitters were too strong. Ever since they have had to turn down the broadcasting power I haven't seen a very strong / reliable transmitter.

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