USB DAC support on USB OTG enabled devices

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Re: USB DAC support on USB OTG enabled devices? {Please vote

Postby DanBa » Fri Dec 21, 2012 6:24 am

As far as I understand the USB Audio Recorder PRO application includes the USB audio module.
It interacts with the USB module of the Android Linux kernel via the standard interface "libusb".
http://libusb.sourceforge.net/doc/index.html

It doesn’t use the Android audio framework, and thus it can avoid the 16/44.1 audio mixing limitation.
It can support 16-bit or 24-bit streams up to 192kHz.

A USB audio source code:
http://www.alsa-project.org/main/index.php/Main_Page
https://github.com/sgs3/GT-I9300_Kernel ... /card.c#L2
https://github.com/sgs3/GT-I9300_Kernel ... /sound/usb
DanBa
 
Posts: 46
Joined: Thu May 10, 2012 9:16 pm

Re: USB DAC support on USB OTG enabled devices? {Please vote

Postby DanBa » Sat Dec 22, 2012 11:48 pm

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

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

. Acer Iconia Tab A200 using USB Audio Recorder PRO (tablet):
http://www.engadget.com/2012/03/15/acer ... 00-review/
http://www.extreamsd.com/USBAudioRecorderPRO/

. Acer Iconia Tab A500 using USB Audio Recorder PRO (tablet):
http://www.engadget.com/2011/04/26/acer ... 00-review/
http://www.extreamsd.com/USBAudioRecorderPRO/

. Archos G9 (tablet):
http://www.anandtech.com/show/5802/the- ... ast-enough
http://forum.xda-developers.com/showthr ... ?t=1539576

. Asus Transformer Pad TF300 using USB Audio Recorder PRO (tablet):
http://www.engadget.com/2012/04/22/asus ... 00-review/
http://www.extreamsd.com/USBAudioRecorderPRO/

. Asus Transformer Pad Infinity TF700 using USB Audio Recorder PRO (tablet):
http://www.engadget.com/2012/06/25/asus ... 00-review/
http://www.extreamsd.com/USBAudioRecorderPRO/

. Asus Transformer Prime using USB Audio Recorder PRO (tablet):
http://www.engadget.com/2011/12/01/asus ... me-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/showpos ... stcount=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 ... st_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 ... st_9082851

. Huawei Ascend D1 Quad XL using USB Audio Recorder PRO (smartphone):
http://www.engadget.com/2012/10/20/huaw ... xl-review/
http://www.head-fi.org/t/628254/fiio-e1 ... st_8988466

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

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

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

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

. Samsung Galaxy Camera EK-G100 using USB Audio Recorder PRO (camera):
http://www.digitaltrends.com/digital-ca ... 00-review/
http://www.extreamsd.com/USBAudioRecorderPRO/

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

. Samsung Galaxy Note 10.1 (tablet):
http://phandroid.com/samsung-galaxy-note-10-1/
http://www.head-fi.org/t/595071/android ... st_8814831

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

. Samsung Galaxy S III (smartphone):
http://www.theverge.com/2012/5/25/30426 ... iii-review
http://www.head-fi.org/t/595071/android ... d-usb-dacs

. Samsung Galaxy Tab 2 7.0 using USB Audio Recorder PRO (tablet):
http://www.engadget.com/2012/04/11/sams ... -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/sams ... l-edition/
http://www.extreamsd.com/USBAudioRecorderPRO/

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

. Sony Xperia S using USB Audio Recorder PRO (smartphone):
http://www.engadget.com/2012/03/08/sony ... -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 Tablet S using USB Audio Recorder PRO (tablet):
http://www.engadget.com/2012/09/24/sony ... -s-review/
http://www.extreamsd.com/USBAudioRecorderPRO/

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

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


A list of standard USB DAC reportedly interworking with the Android-powered smartphone Samsung Galaxy Note II:

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

. Apex Glacier (USB DAC/amp):
http://www.head-fi.org/t/632019/apex-gl ... ion-thread
http://www.head-fi.org/t/632019/apex-gl ... st_8924724

. Asus Xonar U3 (USB DAC/amp):
http://www.overclockersclub.com/reviews/asus_xonar_u3/
http://www.head-fi.org/t/595071/android ... st_8997468

. Audio-gd NFB-16 (USB DAC/amp):
http://www.audio-gd.com/Pro/Headphoneam ... FB16EN.htm
http://www.head-fi.org/t/625054/samsung ... st_8943120

. AudioQuest DragonFly using USB Audio Recorder PRO:
http://www.head-fi.org/t/617241/audioqu ... ny-dac-amp
http://www.head-fi.org/t/595071/android ... st_8959237

. CEntrance DACport LX using USB Audio Recorder PRO:
http://www.headfonia.com/cheaper-better ... acport-lx/
http://www.head-fi.org/t/595071/android ... st_8968468

. ELE EL-D01:
http://www.cnfeature.com/goods.php?id=1299
http://www.head-fi.org/t/643883/portabl ... st_9012249

. FiiO E07K Andes (USB DAC/amp): to be confirmed
http://www.headphiles.org/index.php?t=msg&goto=253249&
http://www.head-fi.org/t/638910/new-fii ... st_8924515
http://www.head-fi.org/t/628254/fiio-e1 ... st_8973799

. Focal XS 2.1 (USB speakers):
http://reviews.cnet.com/speakers-speake ... 18064.html
http://www.homecinema-fr.com/forum/mult ... p177362999

. GoVibe Magnum (USB DAC/amp):
http://www.head-fi.org/t/324577/review- ... sb-dac-amp
http://www.head-fi.org/t/633201/confirm ... st_8809248

. GoVibe Martini-U (USB DAC/amp):
http://jaben-bandung.com/index.php?rout ... uct_id=196
http://www.head-fi.org/t/595071/android ... st_8942287

. GoVibe Vulcan (USB DAC/amp):
http://www.head-fi.org/t/386127/go-vibe-vulcan
http://www.head-fi.org/t/595071/android ... st_8929084

. HRT HeadStreamer Mobile (USB DAC/amp):
http://highresolutiontechnologies.com/h ... mer-mobile
http://www.computeraudiophile.com/f6-da ... ase-14029/

. HeadAmp Pico USB DAC/Amp: bug fixed by HeadAmp
http://www.headfonia.com/headamp-pico/
http://www.head-fi.org/t/595071/android ... st_9037872

. HeadAmp Pico Upsampling USB DAC:
http://www.head-fi.org/t/413230/headamp ... ntro-price
http://www.head-fi.org/t/595071/android ... st_9037872

. Headstage Lyrix Pro USB total (USB DAC/amp):
http://www.headphonia.com/Amps/Headstag ... 10071.html
http://www.head-fi.org/t/595071/android ... st_8854850

. iBasso D-Zero (USB DAC/amp):
http://www.headfonia.com/fiio-e7-meet-y ... so-d-zero/
http://www.head-fi.org/t/625054/samsung ... st_8943120

. iBasso D12 (USB DAC/amp):
http://www.ibasso.com/en/products/show.asp?ID=63
http://www.head-fi.org/t/595071/android ... st_8750862

. Leckerton UHA-6S MKII (USB DAC/amp):
http://www.innerfidelity.com/content/le ... -amplifier
http://www.head-fi.org/t/625054/samsung ... st_8777791

. MyST 1866 PortaDAC (USB DAC/amp):
http://www.musicaacoustics.com/wp/amplifiers/myst-1866/
http://player.ru/showthread.php?t=74459 ... ost1084707

. Objective DAC (ODAC):
http://epiphany-acoustics.co.uk/our-pro ... e-usb-dac/
http://www.jdslabs.com/item.php?fetchitem=46
http://www.headnhifi.com/index.php/shop/objective/odac
http://www.head-fi.org/t/595071/android ... st_8758515

. ODAC+O2 (USB DAC/amp):
http://epiphany-acoustics.co.uk/our-pro ... h-usb-dac/
http://www.jdslabs.com/item.php?fetchitem=48
http://www.headnhifi.com/index.php/shop ... 0527192048
http://www.head-fi.org/t/595071/android ... st_8758515

. RSA Intruder (USB DAC/amp):
http://www.innerfidelity.com/content/ca ... mp-and-dac
http://www.head-fi.org/t/595071/android ... st_8819856

. RSA Predator (USB DAC/amp):
http://www.6moons.com/audioreviews/pred ... tor_2.html
http://www.head-fi.org/t/625054/samsung ... st_8960049

. Sony PHA-1 (USB DAC/amp):
http://www.touchmyapps.com/2012/10/09/s ... in-review/
http://www.head-fi.org/t/595071/android ... st_8769593

. Stoner Acoustics UD100:
http://www.head-fi.org/t/626632/tiny-da ... 00-vs-odac
http://forum.lowyat.net/index.php?showt ... ry56352256

. VentureCraft Go-Dap X (USB DAC/amp): USB cable provided by VentureCraft
http://www.head-fi.org/t/609906/new-ven ... es-and-pcs
http://www.head-fi.org/t/595071/android ... st_8769593

. xDuoo XP-1 (USB DAC/amp):
http://www.jaben.com.hk/ProductView.asp ... SortID=358
http://www.head-fi.org/t/642504/xduoo-n ... -amp-units

. Zoom H4 using USB Audio Recorder PRO (USB recorder):
http://en.wikipedia.org/wiki/Zoom_H4_Handy_Recorder
http://forum.xda-developers.com/showpos ... stcount=23


So far, like the quad-core Exynos powered Galaxy S III, the new quad-core Exynos powered Samsung Galaxy Note II can work with the FiiO E7, the iBasso D12, Leckerton UHA-6S MKII, the ODAC, … ; had some issue with the HeadAmp Pico (bug fixed by HeadAmp); and doesn’t work with the FiiO E17 using the stock USB audio driver.

So, in regard to the USB protocol, the behaviour of the Galaxy Note II is likely identical to the behaviour of the Galaxy S III.


A list of standard USB DAC reportedly interworking with the Android-powered smartphone Samsung Galaxy S III:

stock Samsung Galaxy S III > digital USB audio out >> USB OTG cable (micro-A plug inserted into the S III) >> standard USB DAC >> amp >> headphones

. AMB Gamma 1:
http://www.amb.org/audio/gamma1/
http://www.head-fi.org/t/608535/wolfson ... st_8750043

. AMB Gamma 2:
http://www.amb.org/audio/gamma2/
http://forum.xda-developers.com/showpos ... tcount=279

. Apex Glacier (USB DAC/amp):
http://www.ttvjaudio.com/Apex_High_Fi_A ... 000010.htm
http://www.head-fi.org/t/608535/wolfson ... st_8776449

. Asus Xonar U3 (USB DAC/amp):
http://www.asus.com/Multimedia/Audio_Cards/Xonar_U3/
http://mybroadband.co.za/vb/showthread. ... ost8551119

. Atoll DAC 100:
http://www.6moons.com/audioreviews/atoll2/atoll.html
http://forum.xda-developers.com/showpos ... stcount=17

. Audio-gd Sparrow Version A (USB DAC/amp):
http://www.audio-gd.com/Pro/Headphoneam ... rrowEN.htm
http://www.head-fi.org/t/595071/android ... st_8907415

. Behringer UCA202 (USB DAC/amp):
http://www.behringer.com/EN/Products/UCA202.aspx
http://www.head-fi.org/t/595071/android ... st_8654226

. Behringer UCA222 (USB DAC/amp):
http://www.behringer.com/en/Products/UCA222.aspx
http://www.computeraudiophile.com/f6-da ... post171651

. Beresford Caiman:
http://www.techradar.com/reviews/audio- ... 787/review
http://www.computeraudiophile.com/f6-da ... post171651

. C-Media chipset-based sound card Dynamode 7 channel USB 2.0 (USB DAC/amp):
http://soundplayer.systempebisnisonline ... ound-card/
http://forum.xda-developers.com/showpos ... tcount=449

. Cakewalk Sonar SPS 25:
https://www.cakewalk.com/support/kb/rea ... 2007013101
http://www.computeraudiophile.com/f6-da ... post171651

. Cambridge Audio DacMagic:
http://www.headfonia.com/cambridge-dacmagic-review/
http://www.head-fi.org/t/631855/galaxy- ... st_8899779

. CEntrance DacMini using USB Audio Recorder PRO (USB DAC/amp):
http://centrance.com/products/dacmini/
http://www.head-fi.org/t/595071/android ... st_8998731

. Corsair HS1 Gaming headset (USB DAC/amp/headphones):
http://www.anandtech.com/show/3989/cors ... ng-headset
http://forum.xda-developers.com/showthr ... st27238117

. Creative Xmod:
http://reviews.cnet.com/external-audio- ... 05686.html
http://www.forum-audiophile.fr/musique- ... ml#p336853

. Dared MP 5 or ALO JV5 (USB DAC/amp):
http://www.positive-feedback.com/Issue24/dared_mp5.htm
http://www.head-fi.org/t/595071/android ... st_8948190

. ELE EL-D01:
http://www.head-fi.org/t/586909/the-dis ... st_8886336
http://www.head-fi.org/t/642554/fiio-e7 ... st_8991125

. FiiO E7 (USB DAC/amp):
http://www.headfonia.com/fiio-e7-portable-dac/
http://www.androidnz.net/2012/07/galaxy ... art-2.html

. FiiO E07K Andes (USB DAC/amp): to be confirmed
http://headfonics.com/2012/12/fiio-e07k-the-andes/
http://www.head-fi.org/t/638910/new-fii ... st_8924515
http://www.head-fi.org/t/628254/fiio-e1 ... st_8973799

. FiiO E17 using USB Audio Recorder PRO (USB DAC/amp):
http://www.headfonia.com/the-upgrade-fiio-e17-alpen/
http://www.head-fi.org/t/595071/android ... st_8958018

. Furutech ADL Cruise (USB DAC/amp):
http://www.furutech.com/a2008/product2.asp?prodNo=399
http://www.head-fi.org/t/608535/wolfson ... st_8567838

. GoVibe DAC:
http://jaben.net/forums/index.php?topic=2824.0
http://forum.lowyat.net/index.php?showt ... ry53317360

. GoVibe Mini USB DAC:
http://www.head-fi.org/t/566934/introdu ... ni-usb-dac
http://www.head-fi.org/t/614111/finally ... st_8525675

. GoVibe Petite (USB DAC/amp):
http://www.head-fi.org/t/290711/govibe- ... tle-update
http://www.head-fi.org/t/595071/android ... st_8552452

. HRT HeadStreamer (USB DAC/amp):
http://www.headfonia.com/hrt-headstreamer-review/
http://www.head-fi.org/t/608535/wolfson ... st_8677483

. HRT Music Streamer II:
http://highresolutiontechnologies.com/music-streamer-ii
http://www.head-fi.org/t/608535/wolfson ... st_8534856

. HeadAmp Pico USB DAC/Amp: bug fixed by HeadAmp
http://www.head-fi.org/t/258967/headamp ... der-thread
http://www.head-fi.org/t/632019/apex-gl ... st_9036297
http://www.head-fi.org/t/595071/android ... st_9037872

. HeadAmp Pico Upsampling USB DAC:
http://www.headamp.com/pico/pico_usb_dac/index.htm
http://www.head-fi.org/t/595071/android ... st_9037872

. HeadRoom Total BitHead (USB DAC/amp):
http://www.headphone.com/learning-cente ... ad-faq.php
http://www.head-fi.org/t/595071/android ... st_8527516

. HeadStage USB DAC cable:
http://www.inearmatters.net/2010/04/sho ... cable.html
http://www.headphiles.org/index.php/top ... #msg241979

. HiFiMan Express HM-101:
http://www.head-fi.org/t/571330/hifiman ... le-usb-dac
http://forum.xda-developers.com/showpos ... tcount=291

. HiFimeDIY Sabre USB DAC using USB Audio Recorder PRO:
http://hifimediy.com/index.php?route=pr ... duct_id=83
http://forum.xda-developers.com/showpos ... stcount=75

. Hippo CriCri+ using USB Audio Recorder PRO (USB DAC/amp):
http://www.head-fi.org/t/626412/review- ... -from-this
http://forum.lowyat.net/index.php?showt ... ry57358183

. iBasso D-Zero (USB DAC/amp):
http://www.ibasso.com/en/products/show.asp?ID=73
http://www.head-fi.org/t/571116/review- ... st_8933882

. iBasso D2 Boa (USB DAC/amp):
http://www.ibasso.com/en/products/show.asp?ID=30
http://www.head-fi.org/t/552014/picture ... st_8509186

. iBasso D2+ Boa (USB DAC/amp):
http://www.ibasso.com/en/products/show.asp?ID=42
http://www.computeraudiophile.com/f6-da ... post171651

. iBasso D5 (USB DAC/amp):
http://www.head-fi.org/t/556490/ibasso- ... sb-dac-amp
http://www.head-fi.org/t/614111/finally ... st_8462693

. iBasso D6 using USB Audio Recorder PRO (USB DAC/amp):
http://www.ibasso.com/en/products/show.asp?ID=69
http://www.head-fi.org/t/595071/android ... st_8980613

. iBasso D10 (USB DAC/amp):
http://www.ibasso.com/en/products/show.asp?ID=39
http://www.head-fi.org/t/628374/samsung ... st_8735134

. iBasso D12 (USB DAC/amp):
http://www.ibasso.com/en/products/show.asp?ID=63
http://forum.xda-developers.com/showpos ... tcount=924

. iBasso DB2 using USB Audio Recorder PRO:
http://www.ibasso.com/en/products/show.asp?ID=71
http://www.head-fi.org/t/595071/android ... st_8959039

. iQube v2 (USB DAC/amp):
http://www.i-qube.nl/index.php?id=24
http://forum.xda-developers.com/showpos ... count=1268

. JH Audio JH-3A (USB DSP/DAC/amp/JH16 CIEM):
http://www.jhaudio.com/product/jh-3a-ds ... ar-monitor
http://www.head-fi.org/t/595071/android ... st_8799910

. Jabra GN 5035 (USB headset):
http://reviews.cnet.com/headsets/jabra- ... 62996.html
http://forum.xda-developers.com/showpos ... count=1368

. KingRex UD-01:
http://www.kingrex.co.uk/dac.html
https://www.facebook.com/headfonia/post ... 7358128700

. Leckerton UHA-4 (USB DAC/amp):
http://www.leckertonaudio.com/products/uha-4/
http://www.head-fi.org/t/536982/leckert ... st_8773152

. Leckerton UHA-6S MKII (USB DAC/amp):
http://www.leckertonaudio.com/products/uha-6s-mkii/
http://www.head-fi.org/t/602493/new-lec ... st_8698006

. Logitech wíreless gaming headset G930 (USB wireless headset):
http://www.logitech.com/en-gb/product/7248?crid=721
http://www.head-fi.org/t/595071/android ... st_9004830

. M-Audio Duo USB Audio Interface:
http://www.soundonsound.com/sos/oct02/a ... maudio.asp
http://www.head-fi.org/t/595071/android ... st_8788814

. Matrix Mini-i (USB DAC/amp):
http://www.headfonia.com/matrix-mini-i-balanced-dac/
http://www.head-fi.org/t/595071/android ... st_8768166

. Meier Audio Cantate.2 (USB DAC/amp):
http://www.head-fi.org/products/meier-a ... -cantate-2
http://www.head-fi.org/t/595071/android ... st_8820899

. Microsoft Philips Digital Sound System 80 (USB DAC/amp/speakers):
http://en.wikipedia.org/wiki/Digital_Sound_System_80
http://forum.xda-developers.com/showthr ... ?t=1703218

. Microsoft LifeChat LX-3000 (USB headset):
http://www.microsoft.com/hardware/en-au ... /JUG-00003
http://forum.xda-developers.com/showpos ... count=1355

. MyST 1866 PortaDAC (USB DAC/amp):
http://www.head-fi.org/t/616889/myst-18 ... ons-thread
http://www.head-fi.org/t/595071/android ... st_8852573

. NuForce Icon HDP (USB DAC/amp):
http://www.nuforce.com/hp/products/iconhdp/index.php
http://www.head-fi.org/t/608535/wolfson ... st_8567838

. NuForce Icon Mobile (USB DAC/amp):
http://www.6moons.com/audioreviews/nufo ... obile.html
http://www.head-fi.org/t/595071/android ... st_8759826

. NuForce Icon uDAC-2 (USB DAC/amp):
http://www.digitaltrends.com/headphone- ... -2-review/
http://forum.xda-developers.com/showpos ... stcount=17

. Objective DAC (ODAC):
http://epiphany-acoustics.co.uk/our-pro ... e-usb-dac/
http://www.jdslabs.com/item.php?fetchitem=46
http://www.headnhifi.com/index.php/shop/objective/odac
http://www.head-fi.org/t/628374/samsung ... st_8939722

. ODAC+O2 (USB DAC/amp):
http://epiphany-acoustics.co.uk/our-pro ... h-usb-dac/
http://www.jdslabs.com/item.php?fetchitem=48
http://www.headnhifi.com/index.php/shop ... 0527192048
http://www.facebook.com/permalink.php?s ... 8276945555

. Ordnance .25 (USB DAC/amp):
http://jaben.net/forums/index.php?topic=9984.0
http://www.head-fi.org/t/614111/finally ... st_8462693

. RSA Intruder (USB DAC/amp):
http://www.raysamuelsaudio.com/products/intruder
http://www.head-fi.org/t/627080/new-bal ... st_8781567

. RSA Predator (USB DAC/amp):
http://www.raysamuelsaudio.com/products/predator
http://www.head-fi.org/t/595071/android ... st_8538933

. Sony PHA-1 (USB DAC/amp):
http://www.head-fi.org/t/624676/sony-ph ... le-dac-amp
http://www.head-fi.org/t/645086/samsung ... st_9033830

. Stoner Acoustics UD100:
http://stoneracoustics.blogspot.fr/
http://forum.lowyat.net/index.php?showt ... ry54596977

. Syba SD-AUD20101:
http://www.sybausa.com/productInfo.php?iid=1191
http://www.head-fi.org/t/595071/android ... st_8736082

. Topping D1 Mark 2 (USB DAC/amp):
http://www.head-fi.org/t/636606/topping ... k-2-review
http://forum.xda-developers.com/showpos ... tcount=871

. Topping D2 (USB DAC/amp):
http://www.mightybigword.com/tnt/2012/0 ... ac-review/
http://forum.xda-developers.com/showpos ... count=1357

. Topping TP30 (USB DAC/amp):
http://news.cnet.com/8300-5_3-0.html?ke ... ping+TP-30
http://www.androidnz.net/2012/05/samsun ... audio.html

. Turtle Beach Audio Advantage Micro II:
http://linkai8424.blogspot.fr/2011/03/t ... ro-ii.html
http://www.head-fi.org/t/595071/android ... st_8978516

. Unique Melody PP6 using USB Audio Recorder PRO (USB DSP/DAC/amp/CIEM):
http://www.custom-iem.com/um-platform-p ... p-670.html
http://www.head-fi.org/t/613417/unique- ... st_8965862

. VentureCraft Go-Dap X (USB DAC/amp): USB cable provided by VentureCraft
http://venturecraft.jp/gadget_en/gdx.php
http://www.head-fi.org/t/595071/android ... st_8708233

. xDuoo XP-1 (USB DAC/amp):
http://www.xduoo.com/xduoo/ProductShow.asp?ID=47
http://www.erji.net/read.php?tid=132039 ... ad=&page=1
Last edited by DanBa on Wed Jan 23, 2013 8:24 am, edited 3 times in total.
DanBa
 
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Re: USB DAC support on USB OTG enabled devices? {Please vote

Postby DanBa » Sun Dec 23, 2012 8:03 pm

Unique Melody Platform Pure 6 & Samsung Galaxy S3:
http://www.head-fi.org/t/613417/unique- ... st_8965862

music stored on stock Galaxy S3 > USB Audio Recorder PRO player > digital USB audio out >> "USB OTG" cable >> Unique Melody PP6 > custom IEM

"You have no idea how happy I am right now."


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Re: USB DAC support on USB OTG enabled devices? {Please vote

Postby DanBa » Tue Dec 25, 2012 12:29 pm

USB audio & Android

USB standard (audio, mass storage, etc.) driver supported on stock Galaxy S3 / Note2
"As long as the kernel on the Android device supported the USB standard driver of the hardware (mass storage, input, etc.), Android would be able to use it and therefore open up a new range of extra devices compatible with the system."

USB standard (audio, mass storage, etc.) driver not supported:
* Developing your USB standard (audio, etc.) driver at the kernel space
"However, there are many devices that have not been "compatible" from the beginning. For instance, let's say your common RFID reader. It most likely uses a USB-serial port and probably comes with a Linux or Windows driver as well as some software. Most Android tablets will come without the USB-serial driver for your RFID reader however.
Therefore, if you want to load your driver you will need to root your tablet, determine the version of your current kernel, find the kernel sources online, hope that everything compiles to have your driver ready and then load it onto your tablet. In the end, when you finally have your kernel driver running, you will be required to write C code as well as some JNI glue to communicate with your Activity or Service in Android.
All in all, this approach is not very straightforward.

* Writing your own USB "soft driver" at the user space
There is a very elegant solution to aforementioned problem.
It requires far less skills in hacking and porting than the mentioned approach. However, you will require some advanced knowledge in Android programming as well as some USB know-how.
You can write your own "soft driver" in Android. Since the USB Host API has been released, it is now possible to communicate with any USB device using the most commonly seen USB transfers (control, interrupt, bulk).
In the end, your result will be portable across all Android devices that have USB host enabled and have Android version 3.1+. Moreover, this solution does NOT require root access to the tablet or phone. It is currently the only viable solution that does not require the user to have any know-how of rooting/hacking the device and risk losing warranty in the process."
http://android.serverbox.ch/?p=549

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Last edited by DanBa on Fri Jan 04, 2013 9:45 pm, edited 1 time in total.
DanBa
 
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Re: USB DAC support on USB OTG enabled devices? {Please vote

Postby Nirmalanow » Thu Jan 03, 2013 3:17 pm

The developer of the USB Audio Recorder Pro app has posted the following on a thread about USB for Android on Headfi (http://www.head-fi.org/t/595071/android ... st_9015714):

"Ok, so here is what I think I can do if I understand the Android docs correctly: make a Service that other apps (music players) can 'bind' to, which means they should be able to stream their decoded audio to my 'USB audio service' and the service will then output it to the USB audio device.

The pro's for me are that I don't have to write something that handles playlists and decodes mp3's and I don't have to make fancy graphics that I'm unable to as I'm too techie! redface.gif

But in this case, other app developers like the Neutron Music player or whatever players you guys are in to must be willing to support this service (as in, they need to make several adjustments to their program in order for it to work).

Any authors here of such player apps or people who have good contact with them that can ask?"


This would be awesome if Neutron could easily add external USB DAC support for those of us who want to use our own DACs!
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Re: USB DAC support on USB OTG enabled devices? {Please vote

Postby dmitrykos » Mon Jan 07, 2013 1:02 pm

If some generalized audio output API is provided by developer of USB Audio Recorder Pro then it would be great and Neutron would support it as one of additional output drivers. In the future it also worth trying to develop own USB soft-driver too.
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Re: USB DAC support on USB OTG enabled devices? {Please vote

Postby Theogenes » Thu Jan 10, 2013 3:07 pm

dmitrykos wrote:If some generalized audio output API is provided by developer of USB Audio Recorder Pro then it would be great and Neutron would support it as one of additional output drivers. In the future it also worth trying to develop own USB soft-driver too.


Dmitry, I use Neutron every day and absolutely love it!! But I can tell you, if you were able to develop a soft driver (or another mechanism for outputting unmolested data to an external DAC), the utility of even a massively powerful app like Neutron would be TREMENDOUSLY increased!!!! The wonders Neutron can do in the digital domain, when combined with proper digital-to-analog conversion and amplification would be INSANELY awesome!!!

I wholeheartedly thank you for all that you've done thus far, and encourage you to implement an ability to bypass the Android kernel and output audio to a USB DAC in a manner similar to that of the USB Audio Recorder app (so it works with nearly any DAC).

Keep up the great work, man!!! :)
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Re: USB DAC support on USB OTG enabled devices? {Please vote

Postby dmitrykos » Mon Jan 14, 2013 12:17 pm

Theogenes, will try to implement own (once get needed hardware), or use API of 3-rd party soft driver if developer of "USB Audio Recorder" decides to develop some service which could use other players to output audio stream to USB devices.
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Re: USB DAC support on USB OTG enabled devices? {Please vote

Postby swantzilla » Sat Jan 19, 2013 3:54 pm

Great player but needs DAC support for my Motorola Xoom to make it awesome! DAC works on my Galaxy S3 but is drains the battery so fast as to not be practical.
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Re: USB DAC support on USB OTG enabled devices? {Please vote

Postby DanBa » Wed Jan 23, 2013 8:41 am

HTC Butterfly (aka HTC Droid DNA, HTC J Butterfly): 5", 1920*1080, 2GB RAM, quad-core S4
http://www.htc.com/www/smartphones/htc-butterfly/
http://www.eprice.com.tw/mobile/talk/4542/...84/2/m/4843526/

stock HTC Butterfly > digital USB audio out >> USB OTG cable >> iBasso D12 Hj USB DAC/amp >> Westone UM-3X IEM


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