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Re: USB DAC support on USB OTG enabled devices? {Please vote
Posted: Sun Jul 08, 2012 5:35 pm
by DanBa
The Samsung Galaxy S III interworks with the iBasso D2 Boa:
http://www.head-fi.org/t/552014/picture ... st_8509186
Samsung Galaxy S III > digital audio stream >> USB DAC/amp iBasso D2 Boa >> Sennheiser HD 518
Re: USB DAC support on USB OTG enabled devices? {Please vote
Posted: Sat Jul 14, 2012 6:54 pm
by DanBa
Re: USB DAC support on USB OTG enabled devices? {Please vote
Posted: Sun Jul 15, 2012 11:50 pm
by DanBa
Re: USB DAC support on USB OTG enabled devices? {Please vote
Posted: Tue Jul 17, 2012 4:14 pm
by DanBa
Samsung Galaxy S III interworks with RSA Predator:
http://www.head-fi.org/t/595071/android ... st_8538933
"Just purchased a usb otg cable today and tried out with my RSA predator, works without any problem.
What a suprise! the sound quality actually upgraded, from iPod classic + Predator(amp only) to SIII + Predator(DAC/amp)"
Samsung Galaxy S III > digital audio stream >> USB OTG cable >> USB DAC/amp RSA Predator >> IEM
Re: USB DAC support on USB OTG enabled devices? {Please vote
Posted: Sat Jul 21, 2012 3:01 pm
by DanBa
The combo "Odac + Neco V3" is very well-praised:
http://www.head-fi.org/t/513233/neco-so ... -2-amp/105
"ODAC + NECO V.3 + Sennheiser HD580 = A MATCH MADE IN HEAVEN.
I can't tell you how beautiful this rig sounds. We all know how well the HD580/600 scales with better sources and amps.. but synergy is often undervalued. The ODAC is beautifully resolving and clean.. but the Neco really steals the show, IMO.
My V.3 has the 8610s & lithium battery.. and boy, does the HD580 love it. A DEAD silent background, fantastic dynamic range.. and the artful Sennheiser sound.. on steroids! Treble has spectacular air, crispness, and detail.. the mids are very very transparent and deep.. with the bass coming tight and punchy. One thing I've really noticed the Senn benefits from is the V.3's dual opamp setup.. which provide fantastic channel separation, imaging, and soundstage. It's so immersive.. I can listen to this setup for hours on end. I like this little combo more than my desktop rig (via the tube or SS output!) and the ODAC+O2 (which is a little too clinical). For those one the fence about this amp.. stop waffling.. it's a GEM.
I also dropped the gain jumpers in so I've got it set at low gain (2.3x) since it's being used with the ODAC (2 Vrms output). the Neco it quite ably drives the HE-500, btw. Very clean & dynamic, again.
When driving the HE-500.. I like this combo more than the O2."
The Odac USB DAC can interwork with an Android powered smartphone Samsung Galaxy S III as well as with a PC or a Mac.
Odac USB DAC:
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
Neco V3 amp :
http://www.ebay.co.uk/itm/new-V3-DUAL-A ... d=ViewItem
Re: USB DAC support on USB OTG enabled devices? {Please vote
Posted: Tue Jul 24, 2012 12:43 pm
by DanBa
Solidus wrote:I've read that Jellybean has USB DAC support. Will report back when I get my Nexus 7 in a couple of weeks.
As expected, for the time being the Nexus 7 doesn't interwork with standard USB DAC like FiiO E7 or FiiO E17:
http://www.head-fi.org/t/616125/google- ... st_8525225
A stock Jelly Bean powered Nexus 7 should be able to interwork with an upcoming Android-specific USB audio out-capable USB DAC, like the Gear4 speaker dock, that acts a USB host (and the Nexus 7 as a USB peripheral).
http://www.engadget.com/2012/06/30/gear ... -google-i/
Nexus 7 operating as a USB peripheral > digital audio stream >> Android-specific USB DAC "Gear4 speaker dock" operating as a USB host > Gear4 speaker dock’s amp > Gear4 speaker dock’s speakers
Anyway, the Android-specific USB audio driver is included in the Jelly Bean kernel source code of the Nexus 7:
http://forum.xda-developers.com/showthr ... ?t=1736578
https://github.com/edoko/Air_Kernel_for ... ource.c#L2
2 * Gadget Function Driver for USB audio source device
4 * Copyright (C) 2012 Google, Inc.
43 .bInterfaceClass = USB_CLASS_AUDIO,
44 .bInterfaceSubClass = USB_SUBCLASS_AUDIOCONTROL,
308 .bInterfaceClass = USB_CLASS_AUDIO,
309 .bInterfaceSubClass = USB_SUBCLASS_AUDIOSTREAMING,
The standard USB audio driver is also included in the Jelly Bean kernel source code of the Nexus 7:
https://github.com/drewis/android_kerne ... /card.c#L2
2 * (Tentative) USB Audio Driver for ALSA
174 if ((altsd->bInterfaceClass != USB_CLASS_AUDIO &&
175 altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC) ||
176 altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIOSTREAMING) {
692 .bInterfaceClass = USB_CLASS_AUDIO,
693 .bInterfaceSubClass = USB_SUBCLASS_AUDIOCONTROL }
a standard USB audio-enabled Nexus 7 operating as a USB host > digital audio stream >> standard USB DAC like FiiO E7 or Objective DAC operating as a USB peripheral >> amp >> headphones
It’s up to us to require Google & Android device manufacturers to enable standard USB audio!
http://code.google.com/p/android/issues ... ry%20Stars
Re: USB DAC support on USB OTG enabled devices? {Please vote
Posted: Wed Jul 25, 2012 5:49 pm
by zetathix
Today I bought an OTG cable and try with my system.
SGS3 (neutron neon as player) => OTG => iBASSO D-ZERO (usb in - power switch ON - gain HI - charge OFF) =>IEM (Visang V04)
And it's works! One suggestion is my phone consume more power than pass through 3.5
Because of this method I have a question pop in my head, anyone know which way that Wolfson chip in SGS3 connected to? 3.5?
Re: USB DAC support on USB OTG enabled devices? {Please vote
Posted: Thu Jul 26, 2012 7:37 am
by DanBa
Thanks !
Samsung Galaxy S III 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
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
Re: USB DAC support on USB OTG enabled devices? {Please vote
Posted: Thu Jul 26, 2012 2:09 pm
by zetathix
This is really solid info, Thank you DanBa.
And that dock look nice. But maybe not the way for me to go.
Re: USB DAC support on USB OTG enabled devices? {Please vote
Posted: Thu Jul 26, 2012 8:24 pm
by dmitrykos
It would be great that EVER Android allowed other than 16-bit output. Neutron is capable of supplying audio DAC with any bit depth and outputting to DAC's native 24-bits would be very good for audio quality. I do not speak about changing sampling rate and targeting 1:1 with sampling rate of music file. I HOPE that BlackBerry 10 device offers some more possibilities in this respect and its API allows it unlike Android API.