Database Users

[Q] Audio Through USB

I'm currently aching to be able to play my own music through my car speakers, weird place for this yes.. if it's the wrong section to post this please let me know.
But, I was wondering if it's at all possible to feed the phone's audio through the USB.
For example, I have a USB port on my stero in my car, and when I plug it in..i'm able to feed off my SD card to play the music thats on it. But.. I'd like to be able to play pandora as well..which I'm currently unable to do.
Was wondering if this is possible. If i've confused you feel free to ask more questions
XtaC318 said:
Since it isn't possible.. what about an app that allows me to control the music played? I can stream music from the sd, but its got to mount to read therefore I don't have access to the stock music app. Only way to control what's played is the buttons on the stero and its pain staking..
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Click to collapse

I don't believe this is possible. As far as I know, when you use the usb the deck itself is decoding the mp3's (or whatever music files you're using) directly. It doesn't support playing music through the usb, it just uses the usb to get the files. I hope that makes sense...

So is that why I ca never plat music on my xbox whenever I have a phone hookedup to charge? I thought my xbox just didn't play nice with phones
Sent from my SPH-D700 using XDA App

XtaC318 said:
I'm currently aching to be able to play my own music through my car speakers, weird place for this yes.. if it's the wrong section to post this please let me know.
But, I was wondering if it's at all possible to feed the phone's audio through the USB.
For example, I have a USB port on my stero in my car, and when I plug it in..i'm able to feed off my SD card to play the music thats on it. But.. I'd like to be able to play pandora as well..which I'm currently unable to do.
Was wondering if this is possible. If i've confused you feel free to ask more questions
Click to expand...
Click to collapse
So your car stereo has a USB input but no auxiliary? If so, your best bet would probably be to get an FM transmitter. Like the poster above said, your car's stereo is merely mounting your phone as a mass storage device and reading the mp3 files off the SD card and decoding and playing them locally.

It sees it as you do on the computer, just a drive. The only way to get what you want is to use a source from the phone that plays audio. Head phone jack or Blue Tooth. Your stereo... if it has USB should also have an AUX input or BT. Havn't come across to many that have USB and not an AUX or BT. Its nice though... having Pandora in the car.
If you tell me the Model of the Stereo I can help you out. I have seen a BT to FM Mod. Those are kinda cool. If your in a pinch with a stock stereo.
Sent from my SPH-D700 using Tapatalk

a454nova said:
It sees it as you do on the computer, just a drive. The only way to get what you want is to use a source from the phone that plays audio. Head phone jack or Blue Tooth. Your stereo... if it has USB should also have an AUX input or BT. Havn't come across to many that have USB and not an AUX or BT. Its nice though... having Pandora in the car.
If you tell me the Model of the Stereo I can help you out. I have seen a BT to FM Mod. Those are kinda cool. If your in a pinch with a stock stereo.
Sent from my SPH-D700 using Tapatalk
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Click to collapse
Makes sense. My stero does have an auxiliary port on it, but due to recent events I'm really short on cash lol, was wondering if there was a work around so I'm not limited to my sd for music.
Since it isn't possible.. what about an app that allows me to control the music played? I can stream music from the sd, but its got to mount to read therefore I don't have access to the stock music app. Only way to control what's played is the buttons on the stero and its pain staking..

XtaC318 said:
Makes sense. My stero does have an auxiliary port on it, but due to recent events I'm really short on cash lol, was wondering if there was a work around so I'm not limited to my sd for music.
Since it isn't possible.. what about an app that allows me to control the music played? I can stream music from the sd, but its got to mount to read therefore I don't have access to the stock music app. Only way to control what's played is the buttons on the stero and its pain staking..
Click to expand...
Click to collapse
Nope... The phone isn't even connecting to your stereo. When you put it into USB mode so it can read the SD, it unmounted from the phone. Its as if you pulled the SD out and slid it into a card reader. When you pull the plug... It will remount to the phone. You'll notice it scanning for media at the top.
Now when you go BT... You can control it via the stereo or phone, using the Aux you can control it by the phone. "They" could make the phone controllable via USB like an Iphone but they would have to built that into the stereo like they do the Iphones/Ipods. Not likely to happen unless the Galaxy S takes off like IPOD did.

In theory, a rooted Epic with proper kernel support and hacked cable (since they don't exist commercially) can repurpose the data pins on its USB port for left and right analog audio thanks to the Fairchild FSA9480 USB switching chip inside the phone (the same chip enables the USB pins to be repurposed as a serial port with nonstandard voltage levels, enables the normally-unused fifth pin to be used as mic input, enables it to be used with a special "JIG" interface for JTAG reflashing without having to hand-solder anything to the microscopic internal pads, and apparently can also work its magic in conjunction with a chip by Silicon Imaging to use 5 pins to output a signal that can be transformed by a companion chip (embedded in the cable's connector shell) into valid HDCP-compliant HDMI. I'm pretty sure the 9480 can also repurpose the two data pins for external I2C, but don't quote me on it.
Check out the I9000 boards... they're about 2 months ahead of us. If you google for FSA9480, you can find a brief (but revealing) dialogue between a Samsung engineer and the Kernel.org folks regarding a kernel addition to support the chip. He had a few issues, because on one hand he's apparently not allowed to say much about how the chip works or what it does, but the kernel folks managed to wring much of it out of him one juicy detail at a time. If you check Fairchild's site, they don't even acknowledge that the chip EXISTS, but it's been photographed inside all the Galaxy S phones in various teardowns.
In English -- yes, the hardware exists today to connect your phone to a stereo's analog inputs via a cable that repurposes the USB port... but the official software to make it work from Samsung and Sprint doesn't exist, and the information needed to make it work ourselves on a rooted Epic with AOSP isn't quite available yet.
I'm personally quite happy about the uart, because that means we DO have an easy, low-ceremony way to do i/o between something like a gamepad built into a hardcase a-la-iphone-GameBone that doesn't require Bluetooth (note that if something IS using the USB port for UART purposes, the USB port is still active, but the phone sees it as having nothing connected because the signals from the D+ and D- pins are physically re-routed by the 9480 to the CPU's UART pins. Think of the 9480 as being like an old-fashioned telephone panel with cables that can be moved around to connect the USB port's 5 physical pins to different pins inside the phone.
I'm now pretty sure that this is why there are exactly 7 contacts on the microUSB connector inside the phone -- 5 are used to get the pre-HDMI signals out of the phone, and the other 2 (3, if you count the ground/anchor tabs and assume they carry a signal as well in addition to mechanically anchoring it in place) are used to supply +5v and ground, and possibly one wire for half-duplex signaling purposes.

Wow that was a lot of info... lol. I didn't know that about the usb tho. That's good to know. I was thinking of taking it apart to see.
But... I think he's wanting a UI via the USB like the way some players will do for the IPODs, not analog. To go throught all that when the Head Phone jack will do the same... I could only see that if it was broken or if you really really want only one cord to the phone.
; )
Sent from my SPH-D700 using Tapatalk

I've got an Alpine unit, I hook my USB up - turn on the TUNER. Mount the Drive and once the phone is done - swap back over to USB and i can get all my MP3S. sadly I get all of my ringtones too - odd when the radio is full blast and a track changes - none the less works well for me. Try it.

I purchased this Kensington LiquidAUX Bluetooth Car Kit for my phone a few days ago. It works perfectly on my sister's iPod touch (no AVRCP [silly apple]) and an old WinMo 6.1 phone.
I just got my Epic in the mail today so I'll be testing it out soon.

WTF. AVRCP (bluetooth remote control) is really buggy with this phone. I used the LiquidAUX with an old Omnia for a week with no problems. The Epic connects and plays audio just fine. I can also pause and play music but the forward and back buttons don't work. When I first pair the phone with the device everything is fine, but after disconnecting and reconnecting the remote control stops working. I got it to work after un-paring and re-pairing but it only worked once.
The Moment I had before this had really choppy audio.
EDIT: I had the phone opened up in DDMS and the phone is receiving signals from the remote. But it only reacts to them when the media player is on the screen. Weird.

[Q] Nexus 7 - PC Speakers not working

I have an extra set of logitech computer speakers I want to connect to listen to music on my tablet, but I can't get them working.
They are pretty much new and they work on my TV, WDTV and computer just fine using the same earphone jack adapter, but I get no sound when I plug them into my tablet.
I can plug earphones into the tablet and they work fine.
Anyone know why the pc speakers are not working?

interesting man...never trid this,have n7 from few days,but when i initially red this 3ad i thinked "well,impossible,it's OP only problems.."but when i tried my pc speakers on it (curiosity after reading this)i see that they don't works..strange!hope anyone can enlighten us!also my sound av receiver don't output the sound when connected on n7.on gnex works without problems..
i tried in a game...not in the music player yet,but i think it's the same beahviour..

I would guess there is a mechanical incompatibility with the plug, i.e. it doesn't quite fit. Can you post pictures of the working and non-working plugs?

elmicha said:
I would guess there is a mechanical incompatibility with the plug, i.e. it doesn't quite fit. Can you post pictures of the working and non-working plugs?
Click to expand...
Click to collapse
Here's a picture of both plugs, they both seem to plug into the tablet the same amount and are identical as far as I can see other than being different colors.
Top one is the earphones

Not sure why, but when I did a factory reset on my tablet today the speakers work fine. Maybe it was an app or something interfering with it. Anyways, seems to be working now.

[Q] Use Nexus Q as an external amplifier?

My Nexus Q is slowly collecting dust on my entertainment center. It looks pretty, but being limited to Google Play or YouTube content only just bites. I've already got an iOS device and a receiver that supports Airplay (which quite frankly works much more reliably), so I don't have a reason to leave it plugged in beyond the novelty of it.
What I'd love to do, however, is use for the "audiophile quality" amp it supposedly has in another room with some vintage Bose 301 speakers I have and my desktop PC. Is there any way to get audio in on this thing? It's got optical audio out, would installing CM10 allow me to change that port to optical input instead? Or how about USB, would any hack or rom allow me to plug it into my PC and use it as a USB-Audio device?

splitpea said:
My Nexus Q is slowly collecting dust on my entertainment center. It looks pretty, but being limited to Google Play or YouTube content only just bites. I've already got an iOS device and a receiver that supports Airplay (which quite frankly works much more reliably), so I don't have a reason to leave it plugged in beyond the novelty of it.
What I'd love to do, however, is use for the "audiophile quality" amp it supposedly has in another room with some vintage Bose 301 speakers I have and my desktop PC. Is there any way to get audio in on this thing? It's got optical audio out, would installing CM10 allow me to change that port to optical input instead? Or how about USB, would any hack or rom allow me to plug it into my PC and use it as a USB-Audio device?
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Click to collapse
The only thing I could think of would be an app that makes it a Bluetooth audio reciever. But it doesn't appear to have one. Last I tried cm10.1 the amp didn't work. Just HDMI. You could sell it

FiiO E07K

Any one plugged an FiiO E07K into the USB port and can confirm the unit works with a 9505?
Would be interested in others thoughts/experiences..

have you asked the folks at head-fi.org?
I'd imagine you'd have a better chance there.

My Fiio E07k does't work (USB) with i9505.

I'm using the ATT i337 (nearly identical with the i9505) and it doesn't work with my Fiio E07k either.
My S3 works great with my E07K, so I'm a bit disappointed the S4 doesn't.
I've even tried a couple different roms without success.
If I connect my E07K to my S4 and try to play a music file, it fast forwards through the song/play timer in a couple seconds with no audio output.

Have you guys tried the USB Audio Recorder Pro app? Many DACs that don't work by default work via that app. Nowhere near as ideal as the native USB audio, since that app isn't designed to be a player, but if you got to have it that might be the only way.

NZtechfreak said:
Have you guys tried the USB Audio Recorder Pro app? Many DACs that don't work by default work via that app. Nowhere near as ideal as the native USB audio, since that app isn't designed to be a player, but if you got to have it that might be the only way.
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Click to collapse
Most of the posts I've read about USB Audio Recorder Pro mention that it only supports FLAC and possibly WAV files. I guess I could convert my ALAC files to FLAC though. Just hoping it's a kernel or driver issue that will eventually get sorted out.

Same issue with my Note II
acruxksa said:
I'm using the ATT i337 (nearly identical with the i9505) and it doesn't work with my Fiio E07k either.
My S3 works great with my E07K, so I'm a bit disappointed the S4 doesn't.
I've even tried a couple different roms without success.
If I connect my E07K to my S4 and try to play a music file, it fast forwards through the song/play timer in a couple seconds with no audio output.
Click to expand...
Click to collapse
Have you found an solution for this. I have experiencing the same issues with my Note II and E07K

paul1994 said:
Have you found an solution for this. I have experiencing the same issues with my Note II and E07K
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Click to collapse
No, I have not found a solution, but I'm hoping a custom kernel will eventually sort it out. It's obvious by the way songs FFWD when the E07K is plugged in that the phone "sees" the device, I would guess it just doesn't have the right kernel / usb drivers or configuration to use it properly.

I was also disappointed to find out my E07K doesn't work with the S4. Just got rid of my Note II as well. Any way we can move this forward? Using my headphones on the train just isn't the same!

USB Audio Issues

Tried the USB audio out to a couple of external DACs and both have pops and clicks. It appears like the Shield up samples everything to the max capability of the DAC up to 192k. This causes random unlocking of the signal to the DAC causing the pops and clicks. It also prevents the transmission of bit perfect audio to the DAC.
Does anybody know of a way to switch off up sampling in the Shield so that it plays the native sampling rate of the source? Is there some way of "conning" the Shield during the USB handshake?
Sent from my iPhone using Tapatalk

themystical said:
Tried the USB audio out to a couple of external DACs and both have pops and clicks. It appears like the Shield up samples everything to the max capability of the DAC up to 192k. This causes random unlocking of the signal to the DAC causing the pops and clicks. It also prevents the transmission of bit perfect audio to the DAC.
Does anybody know of a way to switch off up sampling in the Shield so that it plays the native sampling rate of the source? Is there some way of "conning" the Shield during the USB handshake?
Sent from my iPhone using Tapatalk
Click to expand...
Click to collapse
Response from Nvidia customer service:
We're sorry, unfortunately there is no option for Manual control upsampling or downsampling with External Digital to Analog Converter on Shield Android TV.
Any help appreciated!
Sent from my iPhone using Tapatalk

Thanks for posting this. I have similar issues using a NAD D3020 amp as my DAC. If there's constant audio it's fine, but whenever the SHIELD idles for a bit the next sound (e.g. scrolling through menus) is a loud crackle/pop.

This is sorted now with the 3.0 update. It is now possible to select 192k or 44.1k audio output through settings.
Sent from my iPad using Tapatalk

Hi all,
I just saw this thread about USB DAC. My problem is slightly different.
Indeed, FW 3.0 just improved USB DAC compatibility within Android. Still, a new problem arises within Kodi.
With 2.1 FW, I could use my Rega DAC (it is passthrough compatible). AC3 and DTS were sent to my AV receiver perfectly (passthrough working under Kodi).
With 3.0, I can no longer use my Rega DAC under Kodi. Passthrough is not functional within Kodi. I have ugly white/pink noise instead.
So now I'm left with no possibility to let my DAC passthrough the audio to my receiver. This is really boring since my receiver has no USB in, and requires my DAC to passthrough via optical cable.
Good news is improved compatibility under Android system : my other high-end DAC now works with 3.0 (impossible under 2.1) although it is not passthrough compatible.
So my question : what's wrong with the 3.0 update related to USB device or audio passthrough within Kodi ?
Anyone with a hint or solution ? Thanks by advance.

AngelHeart said:
Hi all,
I just saw this thread about USB DAC. My problem is slightly different.
Indeed, FW 3.0 just improved USB DAC compatibility within Android. Still, a new problem arises within Kodi.
With 2.1 FW, I could use my Rega DAC (it is passthrough compatible). AC3 and DTS were sent to my AV receiver perfectly (passthrough working under Kodi).
With 3.0, I can no longer use my Rega DAC under Kodi. Passthrough is not functional within Kodi. I have ugly white/pink noise instead.
So now I'm left with no possibility to let my DAC passthrough the audio to my receiver. This is really boring since my receiver has no USB in, and requires my DAC to passthrough via optical cable.
Good news is improved compatibility under Android system : my other high-end DAC now works with 3.0 (impossible under 2.1) although it is not passthrough compatible.
So my question : what's wrong with the 3.0 update related to USB device or audio passthrough within Kodi ?
Anyone with a hint or solution ? Thanks by advance.
Click to expand...
Click to collapse
First post here, I had a related issue where I had to modify audio_policy.conf in order to get DTS to passthrough to receiver via the TV's optical connection (Shield to TV to Receiver). That problem was related to the TV's EDID not reporting DTS capability, even though it technically works (probably omitted due to licensing fees). Anyway, in \system\etc\audio_policy.conf, there was also a setting for USB passthrough. You may be able to manually enter the formats to passthrough instead of relying on "dynamic", which relies on polling the device what it supports. (requires root access to edit this).

Thanks for advice.
I'll check this and come back after rooting my SATV

settings
Hi,
I've not been able to root my device, since root is difficult to perform with 500gb version added to 4K TV (TWRP not compatible).
Still, seems like USB passthrough is set to "2". Apparently "0" means disabled whereas "1" is activated (correct me if I'm wrong)
So, do I have no choice except from root ? If you have any clue about this, could you please keep me in the know ?
Thanks in advance,

Pops and clicks
I just put in a Turtle Beach Audio Advantage Micro II USB Analog & Digital Audio Adapter. Works just fine like people are saying but when no audio is going on the led on the Micro II goes off. Then when there is anything, even system sounds it kicks on the LED turns on and my speakers pop loud. Has anyone figured a fix or is this just USB audio. And is an HDMI audio puller a better solution for simple stereo 2.1 setup? Or does that pop too?

OK. Think i found a temp fix. When using USB DAC direct to an analog source it kept popping because it was sending live signal to hot amp every time USB DAC would come back from standby. SO how to keep DAC from sleeping when no sound was live, I installed VirtualHere USB Server From the TV Play store. Checked always as this was only USB device i had plugged in. Then went to setting and only checked Start On Boot. Since then after full restart DAC stays on, LED stays lit and sound is always on. No more pops.