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[Tell Google to] Enable USB audio on any Android 4.0 smartphone/tablet
DanBa
post Feb 12 2012, 11:45
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If you want the USB audio enabled on any Android 4.0 device via official firmware/kernel, please vote (aka star) here:
http://code.google.com/p/android/issues/detail?id=24614

Star: Vote by clicking on the star



According to Android 3.1 specifications, Android 4.0 devices could support the USB audio feature, i.e. Android 4.0 devices and USB_CLASS_AUDIO compliant devices like standard USB DAC could interoperate:
http://developer.android.com/guide/topics/usb/index.html
http://developer.android.com/reference/and...bConstants.html

USB_CLASS_AUDIO compliant devices like standard USB DAC don’t need a special USB device driver. Instead, they use an operating system standard driver.
The Android standard USB audio driver is the generic USB Audio Driver for ALSA (Advanced Linux Sound Architecture).
And the latest Android 4.0 includes “card.c“, the USB Audio Driver for ALSA which should be compliant with USB audio class 2 devices allowing for 24 bits / 192 kHz.
https://bitbucket.org/paulobrien/android_ke...ound/usb/card.c



Android relies on Linux version 2.6 for core system services such as security, memory management, process management, network stack, and driver model. The Linux kernel also acts as an abstraction layer between the hardware and the rest of the software stack.
Thus Android handles all the things that Linux is really good at such as a vast array of device drivers, which take the pain out of interfacing to peripheral hardware.


The official Android with USB audio enabled should be used by most people, who don’t want to mod their device.

Android kernel modders have already enabled the USB audio feature on Nook Color tablets which are powered by Android 2.3 Gingerbread.

This post has been edited by Canar: Feb 13 2012, 18:58
Reason for edit: Edited out ToS-infringing content at author's request.


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Android & standard USB audio: Itís up to us!
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[JAZ]
post Dec 8 2012, 19:15
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Analog USB audio??? What does that mean?
[Edit: Ok, i found this link that somehow talks about using the USB cable as an analog output... Never heard of this before, so i cannot even talk about how it is supposed to be implemented)

So.. I have to assume, somehow, that the analog circuitry of the SGS3 (used for headphones) has operational noises, similar to those that happens on computers when moving the mouse or reading the hard drive?

At last, it is not possible to get CD quality background silence, because he's using the (analog) line in of the radio.

This post has been edited by [JAZ]: Dec 8 2012, 19:20
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Posts in this topic
- DanBa   [Tell Google to] Enable USB audio on any Android 4.0 smartphone/tablet   Feb 12 2012, 11:45
- - Canar   All it takes is a custom kernel to enable USB audi...   Feb 12 2012, 19:40
|- - DanBa   QUOTE (Canar @ Feb 12 2012, 19:40) You ar...   Feb 13 2012, 12:22
|- - saratoga   QUOTE (DanBa @ Feb 13 2012, 06:22) QUOTE ...   Feb 13 2012, 17:48
|- - Canar   QUOTE (DanBa @ Feb 13 2012, 03:22) Anyway...   Feb 13 2012, 18:59
|- - DanBa   Thank you!   Feb 13 2012, 21:20
- - saratoga   I think we should just ignore the second half of t...   Feb 12 2012, 21:30
|- - DanBa   QUOTE (saratoga @ Feb 12 2012, 21:30) I t...   Feb 13 2012, 12:39
- - hlloyge   What is the point of that? I don't get it, wha...   Feb 12 2012, 21:44
- - saratoga   It would let you plug any Android phone into the U...   Feb 12 2012, 21:51
|- - andy o   First post is kind of spammy (googled for specific...   Feb 13 2012, 02:28
|- - saratoga   QUOTE (andy o @ Feb 12 2012, 20:28) Does ...   Feb 13 2012, 02:41
- - hlloyge   Oh, I thought it already can do that. My mistake.   Feb 12 2012, 23:04
|- - saratoga   QUOTE (hlloyge @ Feb 12 2012, 17:04) Oh, ...   Feb 13 2012, 01:38
- - saratoga   Actually, google turns up some people using USB ...   Feb 13 2012, 02:43
- - andy o   I think iPads can power USB speakers and headphone...   Feb 13 2012, 03:15
|- - saratoga   QUOTE (andy o @ Feb 12 2012, 21:15) I thi...   Feb 13 2012, 03:25
- - soulsearchingsun   What I'd like to know: Is it necessary for th...   Feb 13 2012, 08:20
|- - DanBa   QUOTE (soulsearchingsun @ Feb 13 2012, 08...   Feb 13 2012, 14:40
- - DanBa   Instructions for enabling USB audio on Ainol Novo ...   Feb 26 2012, 09:45
- - DanBa   "[64GB + 64GB] #GalaxySIII includes an USB dr...   May 4 2012, 10:44
|- - DanBa   QUOTE "[64GB + 64GB] #GalaxySIII includes an ...   May 19 2012, 23:16
- - DanBa   USB audio is enabled on Texas Instruments Blaze ta...   May 18 2012, 00:55
- - DanBa   Like the overwhelming majority of factory or stock...   May 26 2012, 17:43
- - SoNic67   What, the Archos G9 has the USB audio enabled? Wow...   May 27 2012, 03:17
- - DanBa   Apparently, the USB audio feature is enabled on fa...   Jun 2 2012, 09:43
- - DanBa   Samsung Galaxy S III interworks with USB DAC/amp F...   Jun 10 2012, 00:23
|- - DanBa   The Samsung Galaxy S III interworks with the ODAC:...   Jun 22 2012, 21:28
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- - DanBa   The USB DAC recommended by Google is a new type of...   Jun 29 2012, 01:52
- - superconsumer   USB-Audio support for which ADCs with Line-In or S...   Jul 2 2012, 12:56
- - andy o   It seems Android lacks low latency audio, that...   Jul 2 2012, 16:22
- - DanBa   An Android 4.1 Jelly Bean-powered device can have ...   Jul 3 2012, 18:31
- - DanBa   The Samsung Galaxy S III interworks with the iBass...   Jul 8 2012, 18:24
- - DanBa   A list of standard USB DAC reportedly interworking...   Jul 15 2012, 10:39
- - DanBa   The Samsung Galaxy S III interworks with the async...   Jul 16 2012, 00:41
- - DanBa   The Samsung Galaxy S III interworks with the async...   Jul 16 2012, 00:44
- - dumdidum   DanBa, gearporn on HA, O RLY? edit: but thanks f...   Jul 16 2012, 09:22
- - DanBa   Sorry for the double post! I have asked a mode...   Jul 17 2012, 17:04
- - andy o   any testing on the Nexus 7? (BTW, I appreciate all...   Jul 23 2012, 10:43
- - DanBa   As expected, for the time being the Nexus 7 doesn...   Jul 23 2012, 21:33
- - DanBa   A stock Jelly Bean powered Nexus 7 should be able ...   Jul 24 2012, 08:48
- - probedb   The annoying thing with Google is they don't a...   Jul 24 2012, 13:35
- - DanBa   A custom Nexus 7 interworks with a standard USB DA...   Jul 27 2012, 15:01
- - DanBa   A custom Nexus 7 interworks with a standard USB DA...   Aug 9 2012, 16:33
- - andy o   Well, astoundingly, the Nexus 7 doesn't suppor...   Aug 12 2012, 20:20
- - DanBa   The Samsung Galaxy S III with Snapdragon SoC inter...   Aug 23 2012, 11:00
|- - DanBa   Samsung Galaxy S III with Snapdragon SoC & USB...   Aug 26 2012, 15:16
- - DanBa   A Samsung Galaxy S III interworks with a USB DAC/...   Aug 28 2012, 13:59
- - DanBa   A list of standard USB DAC reportedly interworking...   Aug 28 2012, 14:01
- - DanBa   A list of standard USB DAC reportedly interworking...   Aug 28 2012, 14:05
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- - skamp   Why are you so obsessed with using USB DACs with s...   Sep 15 2012, 22:53
|- - DanBa   Lots of spontaneous smiles! "Spent my h...   Sep 18 2012, 09:30
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- - probedb   I'm not sure what this thread is about any mor...   Oct 21 2012, 10:36
- - skamp   http://goo.gl/S2d3O   Oct 21 2012, 11:34
|- - Elbart   QUOTE (skamp @ Oct 21 2012, 12:34) http:/...   Oct 22 2012, 08:24
||- - DanBa   QUOTE (Elbart @ Oct 22 2012, 08:24) QUOTE...   Oct 27 2012, 00:54
||- - skamp   QUOTE (DanBa @ Oct 27 2012, 01:54) There ...   Oct 27 2012, 12:53
|- - probedb   QUOTE (skamp @ Oct 21 2012, 11:34) http:/...   Oct 22 2012, 10:29
- - DanBa   The Samsung Galaxy Note II can work with the FiiO ...   Oct 27 2012, 00:58
- - andy o   Not sure what the advantage is. At first I was int...   Oct 27 2012, 06:35
|- - DanBa   QUOTE (andy o @ Oct 27 2012, 06:35) The a...   Oct 27 2012, 12:14
- - DanBa   A list of standard USB DAC reportedly interworking...   Oct 27 2012, 12:18
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|- - [JAZ]   QUOTE (DanBa @ Dec 8 2012, 14:35) HOLY MO...   Dec 8 2012, 15:48
||- - DanBa   QUOTE ([JAZ] @ Dec 8 2012, 15:48)...   Dec 8 2012, 18:59
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|- - ChronoSphere   QUOTE (kwanbis @ Jan 26 2013, 22:15) Peop...   Jul 7 2014, 14:43
|- - skamp   QUOTE (ChronoSphere @ Jul 7 2014, 15:43) ...   Jul 7 2014, 16:59
|- - kornchild2002   QUOTE (skamp @ Jul 7 2014, 08:59) Or, you...   Jul 7 2014, 17:26
|- - skamp   QUOTE (kornchild2002 @ Jul 7 2014, 18:26)...   Jul 7 2014, 17:44
|- - kornchild2002   QUOTE (skamp @ Jul 7 2014, 09:44) One tab...   Jul 7 2014, 18:59
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|- - skamp   QUOTE (OzarkVe @ Dec 8 2012, 17:23) I don...   Dec 8 2012, 18:25
|- - OzarkVe   QUOTE (skamp @ Dec 8 2012, 12:25) QUOTE (...   Dec 8 2012, 22:00
- - [JAZ]   Analog USB audio??? What does that mean? [Edit: Ok...   Dec 8 2012, 19:15
- - andy o   Wow, that looks messy. Especially for the car, I...   Dec 12 2012, 18:12
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