If you want the USB audio enabled on any Android 4.X device via official firmware/kernel, please vote (aka star) here:
http://code.google.com/p/android/issues/de...Summary%20Stars

Star: Vote by clicking on the star



According to Android specifications, Android 4.X devices could support the USB audio feature, i.e. Android 4.X 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.X 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.


Most USB DAC work without special USB device driver on PC, Mac and hopefully Android 4.X devices with USB audio enabled.

Some USB DAC:

. Portable FiiO USB DAC/amp:
http://www.fiio.com.cn/product/

. Portable iBasso USB DAC/amp:
http://www.ibasso.com/en/products/

. Portable RSA USB DAC/amp:
http://www.raysamuelsaudio.com/products/predator

. Portable HeadAmp USB DAC/amp:
http://www.headamp.com/pico/pico_dac_amp/index.htm

. Portable GoVibe USB DAC/amp:
http://jaben.net/shopping2/Porta-Tube_Plus.html

. Desktop CEntrance USB DAC/amp:
http://centrance.com/products/

. Desktop USB DAC MSB DAC IV:
http://www.msbtech.com/products/platinumHome.php

....



About external USB DAC/Amp

A digital audio system is composed of:



. A storage module: Music is stored in file as a series of bits 0 & 1 with different encoding formats (MP3, WAV, FLAC…).
. A player: The player decodes the bits 0 & 1 to PCM digital audio signals.
. A DAC (Digital to Analog Converter): The DAC converts the PCM digital audio signals to the original analog audio signals.
. An amplifier: The amplifier amplifies the analog audio signals.
. A speaker: The speaker restitutes the music.


Like a PC or a Mac, an Android phone is a digital audio system.




Hopefully, the Android phone, running on a kernel with a USB audio driver, can output the PCM digital audio stream to an external standard USB DAC & amplifier & headphone, much more efficient than the internal DAC & amplifier & speakerphone.






A list of stock Android-powered devices reportedly interworking with standard USB DAC:

stock Android device > digital USB audio out >> standard USB DAC >> amp >> headphones

. Acer Iconia Tab A200 using USB Audio Recorder PRO (tablet):
http://www.engadget.com/2012/03/15/acer-ic...ab-a200-review/
http://www.extreamsd.com/USBAudioRecorderPRO/

. Acer Iconia Tab A500 using USB Audio Recorder PRO (tablet):
http://www.engadget.com/2011/04/26/acer-ic...ab-a500-review/
http://www.extreamsd.com/USBAudioRecorderPRO/

. Archos G9 (tablet):
http://www.anandtech.com/show/5802/the-arc...ews-fast-enough
http://forum.xda-developers.com/showthread.php?t=1539576

. Asus TF101 using USB Audio Recorder PRO (tablet):
http://www.engadget.com/2011/04/18/asus-ee...edition-review/
http://www.extreamsd.com/USBAudioRecorderPRO/

. Asus TF201 using USB Audio Recorder PRO (tablet):
http://www.tomshardware.com/reviews/transf...eview,3175.html
http://www.extreamsd.com/USBAudioRecorderPRO/

. Asus TF300 using USB Audio Recorder PRO (tablet):
http://www.engadget.com/2012/04/22/asus-tr...d-tf300-review/
http://www.extreamsd.com/USBAudioRecorderPRO/

. Asus TF700 using USB Audio Recorder PRO (tablet):
http://www.engadget.com/2012/06/25/asus-tr...y-tf700-review/
http://www.extreamsd.com/USBAudioRecorderPRO/

. Asus Transformer Prime using USB Audio Recorder PRO (tablet):
http://www.engadget.com/2011/12/01/asus-ee...r-prime-review/
http://www.extreamsd.com/USBAudioRecorderPRO/

. Google Galaxy Nexus using USB Audio Recorder PRO (smartphone):
http://www.theverge.com/products/galaxy-nexus-gsm/2946
http://forum.xda-developers.com/showpost.p...69&postcount=52

. Google Nexus 7 using USB Audio Recorder PRO (tablet):
http://www.engadget.com/2012/06/28/nexus-7-review/
http://www.extreamsd.com/USBAudioRecorderPRO/

. Google Nexus 10 using USB Audio Recorder PRO (tablet):
http://www.engadget.com/2012/11/02/nexus-10-review/
http://www.head-fi.org/t/595071/android-ph...10#post_8973836

. HTC Butterfly / HTC Droid DNA / HTC J Butterfly (smartphone):
http://www.htc.com/www/smartphones/htc-butterfly/
http://www.head-fi.org/t/595071/android-ph...25#post_9082851

. HTC One X (smartphone):
http://www.engadget.com/2012/04/02/htc-one-x-review/
http://forum.lowyat.net/index.php?showtopi...&#entry57944246

. Huawei Ascend D1 Quad XL using USB Audio Recorder PRO (smartphone):
http://www.engadget.com/2012/10/20/huawei-...quad-xl-review/
http://www.head-fi.org/t/628254/fiio-e18/15#post_8988466

. Huawei MediaPad using USB Audio Recorder PRO (tablet):
http://www.androidnz.net/2012/09/rapid-rev...adt-mobile.html
http://www.extreamsd.com/USBAudioRecorderPRO/

. iMito MX1 (mini PC):
http://www.squidoo.com/imito-mx1-android-mini-pc-bluetooth
http://www.armtvtech.com/armtvtechforum/vi...&t=669&start=10

. MK808 / MK808B (mini PC):
http://www.squidoo.com/mk808-dual-core-and...-mini-pc-review
http://tabletrepublic.com/forum/android-mi...ongle-3092.html

. Meizu MX Quad-Core using USB Audio Recorder PRO (smartphone):
http://www.xda-developers.com/android/meiz...ad-core-review/
http://www.extreamsd.com/USBAudioRecorderPRO/

. Minix Neo G4 (mini PC):
http://www.squidoo.com/minix-neo-g4-review
http://www.facebook.com/minixtech/posts/466648763397297

. Minix Neo X5 (mini PC):
http://tabletrepublic.com/forum/android-mi...eview-3241.html
http://forum.audiogon.com/cgi-bin/fr.pl?dd...20&openflup&5&4

. Motorola Razr Maxx HD using USB Audio Recorder PRO (smartphone):
http://www.engadget.com/2012/10/19/droid-r...maxx-hd-review/
http://www.extreamsd.com/USBAudioRecorderPRO/

. Motorola Xoom using USB Audio Recorder PRO (tablet):
http://www.engadget.com/2011/02/23/motorola-xoom-review/
http://www.extreamsd.com/USBAudioRecorderPRO/

. Samsung Galaxy Camera (camera):
http://www.digitaltrends.com/digital-camer...k-gc100-review/
http://www.sogi.com.tw/android/article_lis...opic_ID=6205384

. Samsung Galaxy Note II (smartphone):
http://www.engadget.com/2012/10/08/samsung...note-ii-review/
http://www.head-fi.org/t/595071/android-phones-and-usb-dacs

. Samsung Galaxy Note 10.1 (tablet):
http://phandroid.com/samsung-galaxy-note-10-1/
http://www.head-fi.org/t/595071/android-ph...45#post_8814831

. Samsung Galaxy R using USB Audio Recorder PRO (smartphone):
http://www.engadget.com/2011/08/10/samsung...and-asia-nobod/
http://www.extreamsd.com/USBAudioRecorderPRO/

. Samsung Galaxy S III (smartphone):
http://www.theverge.com/2012/5/25/3042640/...xy-s-iii-review
http://www.head-fi.org/t/595071/android-phones-and-usb-dacs

. Samsung Galaxy Tab 2 7.0 using USB Audio Recorder PRO (tablet):
http://www.engadget.com/2012/04/11/samsung...b-2-7-0-review/
http://www.extreamsd.com/USBAudioRecorderPRO/

. Samsung Galaxy Tab 7.7 using USB Audio Recorder PRO (tablet):
http://www.engadget.com/2012/02/07/samsung...tional-edition/
http://www.extreamsd.com/USBAudioRecorderPRO/

. Samsung Galaxy Tab 10.1 using USB Audio Recorder PRO (tablet):
http://www.engadget.com/2012/05/15/samsung...-2-10-1-review/
http://www.extreamsd.com/USBAudioRecorderPRO/

. Sony Tablet S / S1 using USB Audio Recorder PRO (tablet):
http://en.wikipedia.org/wiki/Sony_Tablet_S1
http://www.head-fi.org/t/595071/android-ph...25#post_9176002

. Sony Xperia P using USB Audio Recorder PRO (smartphone):
http://www.engadget.com/2012/06/03/sony-xperia-p-review/
http://www.head-fi.org/t/595071/android-ph...35#post_9131701

. Sony Xperia S using USB Audio Recorder PRO (smartphone):
http://www.engadget.com/2012/03/08/sony-xperia-s-review/
http://www.extreamsd.com/USBAudioRecorderPRO/

. Sony Xperia Sola using USB Audio Recorder PRO (smartphone):
http://www.androidcentral.com/device/sony-xperia-sola
http://www.extreamsd.com/USBAudioRecorderPRO/

. Sony Xperia Z (smartphone):
http://www.engadget.com/2013/02/20/sony-xperia-z-review/
http://www.youtube.com/watch?v=kgNkOs9o1dU

. Toshiba Thrive using USB Audio Recorder PRO (tablet):
http://www.engadget.com/2011/07/22/toshiba-thrive-review/
http://www.extreamsd.com/USBAudioRecorderPRO/

. Wiko Cink King using USB Audio Recorder PRO (smartphone):
http://www.wikomobile.com/telephone-portable-Cink-king.php
http://www.extreamsd.com/USBAudioRecorderPRO/






The compatibility list of Android devices / USB DAC is regularly updated at the following topic:
Android phones and USB DACs

We should put pressure on Google, and therefore on the Android device manufacturers.

USB audio is included in Android 3.1 or newer platforms.
http://developer.android.com/guide/topics/usb/index.html

It is up to Google for its reference Nexus and the other Android device manufacturers to support or enable the USB audio feature on their devices.

An example:
Interworking between Archos G9 tablet and USB DAC FiiO E17:
http://www.jbmm.fr/2012/01/utiliser-le-dac...vec-son-archos/





The Archos G9 tablet is powered by Android 3.2 Honeycomb.
http://www.archos.com/products/gen9/archos...ntry=us&lang=en
http://update.archos.com/9/gen9/changes_fi...ndroid_gen9.htm

Version 3.2.22 - September 2nd, 2011: USB audio not supported
Initial Honeycomb 3.2 firmware release

Version 3.2.77 - December 6th, 2011
Accessories: external USB audio cards (DAC) support has been added

Version 3.2.78 - December 19th, 2011
Audio accessory: fix USB DAC not supporting 44.1kHz

---

Added on February 11, 2012, 11:01 pmThe official Android with USB audio enabled should be used by most people, who don’t want to mod their devices.

A die-hard audiophile minority should likely use audio-optimized Android kernels modded by some kernel modders.

"An interesting example is the HRT music streamer II, it IS asynchronous USB, but it is still very sensitive to what happens in the computer. On the SAME COMPUTER I can make simple changes to OS scheduling parameters and get a huge difference in the sound. At one end of the scale it’s dull, lifeless, no depth at all, at the other end of the scale it is wonderfully alive, dynamic, huge depth etc. And all this by just changing a few numbers, NO change in hardware at all."
http://www.audioasylum.com/cgi/m.pl?forum=pcaudio&n=101397

For example, an underclocked kernel should be better than a normal kernel to provide a lesser jittered digital audio stream to a USB DAC, because the USB transmission clock is less polluted by electric and electromagnetic interferences generated by different processors.

Anyway, Android kernel modders have already enabled the USB audio feature on Nook Color tablets which are powered by Android 2.3 Gingerbread.
http://forum.xda-developers.com/showpost.p...3&postcount=587

---

Added on February 13, 2012, 11:25 pmThank you for your votes!

The USB audio request is currently ranked 50, and there are 17550 requests.
http://code.google.com/p/android/issues/de...Summary%20Stars

In fact, it is ranked in top 10 of less than one year old requests.

An Android kernel developer is trying to enable the USB audio feature (i.e. to allow interoperability between Samsung Galaxy S2 and USB DAC).
He is looking for testers.

"Anyone have a dmesg log when connecting a DAC device? I don't use one so I can't test and get logs. If you need DAC support you'll need to help out here. If not, I can simply remove support for it in 1.4 since it doesn't work right and I can't test it."
http://forum.xda-developers.com/showpost.p...postcount=10082

Red Pill Kernel
RedPill_Rev1.3
Experimental: USB Audio support for DAC devices
http://forum.xda-developers.com/showthread.php?t=1288850



The official USB audio request is currently ranked 33 of 17817.
http://code.google.com/p/android/issues/de...Summary%20Stars

In fact, it is ranked in top 4 of less than one year old requests.

Vote: Click on the star

Thank you for your votes!

Why not a battery-powered USB hub?

This post has been edited by DanBa: Mar 2 2013, 06:58 PM

very comprehensive and is a good idea, never knew had the capability in ICS, but the problem is there are a lot of port for other mobile using ICS port, like mine ICS on Desire, which i dont think drivers are portable to the phone, so basically it may work with devices that CAME with ICS and not the ported bunch

keep up the progress mate, looks promising for androphile (android + audiophile) like me

not working on hippo cricri+ with s3

this is very interesting...

Can use Android as media server dy...

But how come my Iconia do not support E10?

i give support on this, it takes long to ditch my fuze. less one thing occupying my pouch

Even IF they had sort out the necessary code to enable USB audio out on Android, the phones and tablets will not have enough power supply to drive the FiiO E10

If it is the FiiO E7 or E17, with their in-built batteries, no worries any more.

Instructions for enabling USB audio on Android 4.0 powered Ainol Novo 7 Advanced Allwinner tablet:
http://www.slatedroid.com/topic/29289-usb-...ivers-and-libs/


The official USB audio request is currently ranked 22 of 18,464.
http://code.google.com/p/android/issues/de...Summary%20Stars

It is ranked in top 3 of less than one-year-old requests.

Vote: Click on the star, which appears after signing in

Thank you for your votes!

Hopefully, we will have soon (USB) digital audio Android docks.

The 1st out-of-the-box (i.e. without modding) Android device able to output a USB digital audio stream is the Android 4.0 ICS powered Archos G9 tablet:
http://www.engadget.com/2012/03/15/archos-...t-now-shipping/
http://update.archos.com/9/gen9/changes_fi...oid_gen9it4.htm
http://forum.xda-developers.com/showthread.php?t=1539576

Archos G9 > USB digital audio > Logitech USB speaker




For the time being, the standard USB devices for USB host-capable Android devices are only USB hubs, USB mass storage devices and USB class for human interface devices (for example, mice and keyboards).

We have to lobby for imposing USB DAC as a standard Android USB device, like a standard USB device for every Mac or PC (i.e. we don’t have to request each individual PC manufacturer to add the USB audio capability).

Google should include USB host (and USB audio) on every new Google "Nexus" device, which is supposed to be a reference Android device for others.

The Google issue "Enable USB audio", requesting Google to standardize USB audio on Android smartphones/tablets, is currently ranked 19 of 19,006.
http://code.google.com/p/android/issues/de...Summary%20Stars

It is ranked in top 3 of less than one-year-old requests.

Vote: Click on the star (it appears after signing in)

---

Added on May 4, 2012, 5:40 pm"[64GB + 64GB] #GalaxySIII includes an USB driver named "snd-usb-audio" [ALSA USB audio driver]. Only testing will tell if it means USB DAC are supported out of the box." [Supercurio]
https://twitter.com/#!/supercurio/statu...218860128780289


The Google issue "Enable USB audio", requesting Google to standardize USB audio on Android smartphones/tablets, is currently ranked 12 of 21,436.
http://code.google.com/p/android/issues/de...Summary%20Stars

It is ranked in top 2 of less than one-year-old requests.

Vote: Click on the star (it appears after signing in)

---

Added on June 2, 2012, 5:35 pmApparently, the USB audio feature is enabled on factory Samsung Galaxy S III:
http://forum.xda-developers.com/showpost.p...6&postcount=133

"I got my sgs3 a few hours ago and just plugged it into my Topping tp30 USB DAC/amp and it's playing audio through it to my speakers!!!"


Affordable hi-fi rig:
http://news.cnet.com/8301-13645_3-20058833...l?tag=txt;title

music stored on SGS3 > SGS3 player > digital audio stream >> USB cable >> USB DAC/amp Topping TP30 >> speakers











Keep lobbying for the Android USB audio standardisation (i.e. USB DAC as a standard USB device, like a USB mass storage device, for Android smartphone/tablet).
http://code.google.com/p/android/issues/de...20Summary%20Sta rs

Vote: Click on the star (it appears after signing in)

Samsung Galaxy S III interworks with USB DAC/amp FiiO E7:
http://www.androidnz.net/2012/06/galaxy-s-...-it-really.html

music stored on SGS3 > SGS3 player > digital audio stream >> USB OTG cable >> USB DAC/amp FiiO E7 >> headphones


Samsung Galaxy S III triggers a new era of Hi-Fi for the masses with affordable rig:

. affordable (subsidized) smartphone

. affordable common USB DAC/amp compliant with PC or Mac, like FiiO E7 (us$80)
http://www.amazon.com/FiiO-Portable-Headph...39194973&sr=8-4
NwAvGuy geek’s verdict: "The biggest compliment I can pay the E7 is I can’t find much I would change for a portable product in this price category."
http://nwavguy.blogspot.fr/2011/05/fiio-e7-usb-dac-amp.html
"Clearly, the E7 is priced very competitively, and I consider it a good product — not some cheap Chinese stuff. Not only is the E7 packed with features, it also comes with a solid build quality, and a solid sound quality as well."
http://www.headfonia.com/fiio-e7-portable-dac/

. affordable headphones, like Digitech Pro Monitor Headphones (us$50), clone of Fischer Audio FA-003, Brainwavz HM5 or Lindy Premium Hi-Fi headphones
http://www.jaycar.us/productView.asp?ID=AA2065
"Now that I've had these for a good month I can honestly say they are my 'New' daily headphones!
I simple love the music that comes from these headphones.
They are beautifully balanced with sparkly highs that are not offensive to the ears, mid's that introduces a 'fun' factor to the music for all genres and lastly lows that are firm, bassy and goes amazingly deep with out distorting or overpowering the rest of the music.
The clarity is excellent with a very nice sound stage and for a 'closed' headphone they do sound quite open and spacious!
Isolation is fantastic especially listening to music or playing games at night.
Comfort is excellent and the 'killer' clamp grip slowly eases after regular use! I've listened to these all night and in to the early morning without wanting to take them off!"
http://www.head-fi.org/products/digitech-p...es/reviews/6900





Keep lobbying for the Android USB audio standardisation (i.e.USB DAC as a standard USB device, like a USB mass storage device, for Android smartphone/tablet).
http://code.google.com/p/android/issues/de...Summary%20Stars

Vote: Click on the star (it appears after signing in)

Samsung Galaxy S III interworks with Microsoft Digital Sound System 80:
http://forum.xda-developers.com/showthread.php?t=1703218

music stored on SGS3 > SGS3 player > digital audio stream >> USB OTG cable >> USB DAC/amp/speakers Digital Sound System 80




Samsung Galaxy S III interworks with Corsair HS1 Gaming headset:
http://forum.xda-developers.com/showthread...17#post27238117

music stored on SGS3 > SGS3 player > digital audio stream >> USB OTG cable >> USB DAC/amp/headphone Corsair HS1 Gaming headset



This post has been edited by DanBa: Mar 12 2012, 12:09 AM

cool will android have LOD dgital in-out and dock speaker?

any Galaxy Note 10.1 user use the USB OTG like this?

As I know the are two type DAC which with chip that work with PC USB
and Apple iDevice
So this Samsung it is use the PC USB type rite?

already voted long ago

keep my hope up for this to work

Just click on the star? YUP!

That's something pleasant to have, since smartphones don't usually come with a good DAC. KUDOS and let our wish come true!

yup, the only good one is sgs1 with voodoo mod, hopefully can move on from it if it is successful.

Y i only know this after i have sold my E7....OMG
anyway already did voted

Only SGS3, not for older galaxy models... :sad: saw the blog Galaxy Note is not supported.
Hoping Android 4.0 later version has it.

It's confirmed that next Android 4.1 Jelly Bean will support USB Audio output.
Google "Android Jelly Bean USB Audio" shows plenty results.

Pray Galaxy Note gets the update so I can really goes portable with my newly purchased DAC.

We have to push manufacturers to enable USB audio on Galaxy Note and on any other Android device.
And we have to attract modders/developers to provide audiophile Android kernels with true 44.1/96/192 kHz bit perfect audio, automatic sample rate switching, underclocking in order to get less EMI/RFI, high priority audio thread, optimized audio kernel parameter settings, asynchronous USB …

We can use the somewhat official "Google issue Enable USB audio" web page as a means of the promotion of Android USB audio.
http://code.google.com/p/android/issues/de...Summary%20Stars
Vote: Click on the star (it appears after signing in)

By the way, some modders are trying to enable USB audio on Galaxy Note:
http://forum.xda-developers.com/showthread.php?t=1700924


A digital audio rig:
http://www.androidnz.net/2012/06/samsung-g...ivity-demo.html

music stored on Samsung Galaxy S III > Samsung Galaxy S III player > digital audio stream >> USB OTG cable >> USB DAC/amp FiiO E7 >> Logitech speaker

---

Added on June 23, 2012, 4:06 amThe Samsung Galaxy S III interworks with the USB DAC "ODAC"
http://forum.lowyat.net/index.php?showtopi...post&p=52442942

---

Added on June 28, 2012, 5:29 pm"Android 4.1 for Developers
New Media Capabilities
USB Audio
USB audio output support allows hardware vendors to build hardware such as audio docks that interface with Android devices."
http://developer.android.com/about/version...bean.html#media

---

Added on June 29, 2012, 9:03 amThe USB DAC recommended by Google is a new type of device. It is not compatible with PC or Mac.
http://developer.android.com/tools/adk/aoa...l#audio-support
http://developer.android.com/tools/adk/adk2.html#play-audio



A legacy USB DAC compatible with PC / Mac acts as a USB device, and a PC / Mac acts as a USB host.
A USB DAC recommended by Google acts as a USB host, and a Android smartphone / tablet acts as a USB device.

Personally, I prefer the legacy USB audio feature implemented by Samsung on Galaxy S III, which can interwork with a legacy USB DAC like FiiO E7 or ODAC.

The legacy USB audio feature is still specified in the Android specs:
http://developer.android.com/guide/topics/.../usb/index.html
http://developer.android.com/guide/topics/...y/usb/host.html
http://developer.android.com/reference/and...bConstants.html
"USB_CLASS_AUDIO USB class for audio devices"

An Android 4.1 Jelly Bean-powered device can have both USB audio out modes: standard USB audio out and Android-specific USB audio out.
These features are at the Android kernel level.
http://developer.android.com/tools/adk/aoa...l#audio-support

"Android Open Accessory Protocol 2.0 includes optional support for audio output from an Android device to an accessory. This version of the protocol supports a standard USB audio class interface that is capable of 2 channel 16-bit PCM audio with a bit rate of 44100 Khz. AOA 2.0 is currently limited to this output mode, but additional audio modes may be added in the future.
To enable the audio support, the accessory must send a new USB control request: SET_AUDIO_MODE"







It should be easy to enable standard USB audio out and Android-specific USB audio out on an Android 4.1 Jelly Bean-powered device with USB host capability.

Let's keep up the pressure on Google and the Android device manufacturers for the standard USB audio out:
http://code.google.com/p/android/issues/de...Summary%20Stars

Snapdragon-powered Samsung Galaxy S III & HeadAmp Pico:
http://www.head-fi.org/t/552014/pictures-o...00#post_8636759

Galaxy S III > digital audio stream >> HeadAmp Pico >> Beyerdynamic T5p

---

Added on September 8, 2012, 7:20 pmSamsung Galaxy S III & asynchronous USB DAC HRT Streamer II:
http://www.head-fi.org/t/608535/wolfson-da...65#post_8534856

Galaxy S III > digital audio stream >> HRT Streamer II >> cMoyBB headphone amplifier

---

Added on September 9, 2012, 6:53 pmSamsung Galaxy S III & iBasso D2 Boa:
http://www.head-fi.org/t/552014/pictures-o...35#post_8509186

Samsung Galaxy S III > digital audio stream >> iBasso D2 Boa >> Sennheiser HD 518

---

Added on September 9, 2012, 7:03 pmSamsung Galaxy S III & RSA Predator:
http://www.head-fi.org/t/595071/android-ph...50#post_8538933

Samsung Galaxy S III >> USB OTG cable >> USB DAC/amp RSA Predator >> IEM

---

Added on September 9, 2012, 7:15 pmSamsung Galaxy S III with Snapdragon SoC & HeadAmp Pico & Thunderpants TP1:
http://www.head-fi.org/t/552014/pictures-o...30#post_8639661

Galaxy S III > digital audio stream >> USB OTG cable >> Pico >> Thunderpants TP1

---

Added on September 9, 2012, 7:17 pmSamsung Galaxy S III with Snapdragon SoC & HeadAmp Pico & Audez'e LCD-2:
http://www.head-fi.org/t/552014/pictures-o...30#post_8639661

Galaxy S III > digital audio stream >> USB OTG cable >> Pico >> Audez'e LCD-2

---

Added on September 9, 2012, 7:24 pmSamsung Galaxy S III & Epiphany Acoustics E-DAC (i.e. ODAC):
http://www.avsforum.com/t/1393599/enable-u...0#post_22349652

Galaxy S III >> 4-in-1 connection kit substituting a USB OTG cable >> ODAC >> Headstage Arrow G3 amp

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Added on September 9, 2012, 7:36 pmSamsung Galaxy S III & & Objective DAC:
http://www.head-fi.org/t/595071/android-ph...15#post_8707637

stock Galaxy S III > digital audio stream >> ODAC (i.e. Epiphany Acoustics E-DAC) >> Neco V3

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Added on September 9, 2012, 7:40 pmSamsung Galaxy S III & Epiphany Acoustics EHP-O2D:
http://www.totallydubbed.net/2012/09/17/un...2-interconnect/

Galaxy S III >> EHP-O2D (i.e. ODAC + O2 combo) >> Denon AH-D2000

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Added on September 23, 2012, 8:06 pmSamsung Galaxy S III & affordable tiny Stoner Acoustics UD100:
http://forums.hardwarezone.com.sg/70075257-post210.html

stock Galaxy S III > digital USB audio out >> UD100 >> Sennheiser IE80



This post has been edited by DanBa: Sep 23 2012, 07:59 PM

wohoo! if JB really gets USB support, i'll need to get extra batteries for my samsung phones!

anyway i tested out

S3 -> OTG -> Predator DAC/Amp -> customs and it works.

You mean this?

This is a Samsung-proprietary analog line out.

Samsung Galaxy S III line out bypassing the internal amp:
S III player > digital audio stream > S III internal DAC > analog audio stream > micro USB connector >> Samsung audio dock >> amp >> headphones

Samsung Galaxy S3 USB out bypassing the internal DAC:
Samsung Galaxy S III > digital audio stream > micro USB connector >> USB OTG cable >> standard USB DAC >> amp >> headphones

Samsung Galaxy S III headphone out:
S III player > digital audio stream > S III internal DAC > analog audio stream > S III internal amp > 3.5mm 4-pole connector >> headphones

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Added on October 7, 2012, 1:00 amA list of standard USB DAC reportedly interworking with an Android-powered tablet Samsung Galaxy Note 10.1:

stock Samsung Galaxy Note 10.1 > digital USB audio out >> USB OTG cable (micro-A plug inserted in the Note 10.1) >> standard USB DAC >> amp >> headphones


. HeadAmp Pico: (via a powered USB hub)
http://www.headamp.com/pico/pico_dac_amp/index.htm
http://www.head-fi.org/t/595071/android-ph...55#post_8658440

. HeadAmp Pico DAC: (via a powered USB hub)
http://www.headamp.com/pico/pico_usb_dac/index.htm
http://www.head-fi.org/t/595071/android-ph...55#post_8658440

. HifiMan HM-601:
http://hifiman.us/Products/?pid=98
http://www.head-fi.org/t/624284/using-the-...nes-and-tablets

. HifiMan HM-801:
http://www.soundandvisionmag.com/blog/2011...c-player-review
http://www.head-fi.org/t/624284/using-the-...nes-and-tablets

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Added on October 7, 2012, 1:03 amThe standard USB audio is also enabled on stock Samsung Galaxy Note II:
http://www.eprice.com.tw/mobile/talk/4523/4815783/1/1/

stock Galaxy Note II > digital USB audio out >> iBasso D12 Hj >> Westone UM3X






In fact, there are three types of USB audio.



An Android 4.1 Jelly Bean device can have:
. a standard USB audio capability (or USB audio host capability), or/and
. an Android-specific USB audio capability (or USB audio accessory capability).

An Android device that has the standard USB audio capability can interwork with standard/conventional USB DAC.
A standard/conventional USB DAC can be a self-powered device, or a bus-powered device.
Some bus-powered USB DAC like the Objective DAC (ODAC) can be powered by some Android smartphone like the Samsung Galaxy S III.
If a bus-powered USB DAC requires too much power, it should connect to an Android device via a self-powered USB hub.

An Android device that has the Android-specific USB audio capability should interwork with a USB DAC of a new type.
Such a USB DAC must theoretically provide power to an attached Android device.

A prototype of an Android-specific USB DAC / amp, FiiO E18, will be shown next week.



This post has been edited by DanBa: Oct 7 2012, 01:03 AM

Standard USB Audio, does this able to works with any external DAC?
It seems like S3 can't works with Hippo Cri Cri+ from its stock 4.0 ICS.
Does this also require hardware support?
Would like to see this support in some older dual-core siblings (Galaxy S2 and Galaxy Note v1), otherwise I might need to spend another for external DAC that can actually support it

Yes.







Android USB audio is young.

It seems Samsung USB driver is very intolerant with USB DAC which is not quite compliant with the USB spec.
http://www.head-fi.org/t/627459/use-a-stan...de#post_8707621

If a USB DAC can’t work with the S3, a dmesg log output should be published so that Samsung engineers could be aware of the issue and fix it.

It just requires a right USB cable, and Plug & Play.

A standard USB DAC operates only as a USB peripheral. It only interworks with a USB host.

The S3 is a USB On-The-Go device.
A USB OTG device can act as a USB host or as a USB peripheral.

Simply put, a USB OTG device, like the S3, acts as
. a USB peripheral when a Micro-B plug is inserted [regular cable]
. a USB host when a Micro-A plug is inserted ["OTG cable"]





S3 as USB peripheral:
. S3 – regular cable – PC / Mac as USB host
. S3 – regular cable – upcoming specific Android Jelly Bean-compliant USB DAC as USB host

S3 as USB host:
. S3 – "OTG cable" – USB mouse as USB peripheral
. S3 – "OTG cable" – standard USB DAC as USB peripheral

Hopefully, Google and Android device manufacturers will enable the standard USB audio on any Android device. It should be available to everyone, and not only for a few ones hacking their Android device.

One of the ways to let them know that is to vote for the Google issue "Enable (standard) USB audio":
http://code.google.com/p/android/issues/de...Summary%20Stars
Vote: Click on the star (it appears after signing in)

And please ask around.

Wow, cool, full explanation, THANKS! Will definitely vote for it.

This post has been edited by wildwestgoh: Oct 7 2012, 06:39 PM