Good news about Android phone supports digital audio output
Jul 5, 2012 at 4:41 AM Post #152 of 253
Kiteki, I don't think usb receiver based on PCM2706 is worthwhile... unless it is buffered and asynchronously clocked before fed into the DAC... I own PCM2706 converter, and it make most of the upstream DACs that I tried sounded bad... maybe except my own Monica2 DAC, which is digitally buffered and asynchronously clocked before going to the DAC chip. (by design, not a choice, TDA1545 on Monica2 use japanese EIAJ format and thus standard I2S must be converted first)
 
Jul 5, 2012 at 5:10 AM Post #154 of 253
sama-sama... BTW I want to know your impression on FXD80 :) that leather case is very tempting... but Tenso don't ship to Indonesia...
 
Jul 5, 2012 at 7:35 AM Post #157 of 253
Quote:
Originally Posted by proton007 
 
I'm not sure if google will support USB Audio host mode.

 
The USB Audio host mode is specified in Android specifications:
http://developer.android.com/guide/topics/connectivity/usb/index.html
http://developer.android.com/guide/topics/connectivity/usb/host.html
http://developer.android.com/reference/android/hardware/usb/UsbConstants.html
"int USB_CLASS_AUDIO USB class for audio devices."
 

 
The standard USB audio module is present in the kernel source code of the Android 4.0 Ice Cream Sandwich powered Galaxy Nexus. It is not included in the stock binary kernel of the 4.0 Galaxy Nexus.
Very likely, the standard USB audio module, including a new control request, is present in the kernel source code of the Android 4.1 Jelly Bean powered Galaxy Nexus; and it is included in the stock binary kernel of the 4.1 Galaxy Nexus.
 
"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"
http://developer.android.com/tools/adk/aoa2.html#audio-support
 
Hence, a 4.1 Android device can support the USB audio host mode and the USB audio client mode.

 
Quote:
But I think developers should be able to hack it and get it working.

 
Hopefully, Google and Android device manufacturers will enable the USB audio host mode along with the USB audio client mode on their stock 4.1 Android devices. 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/detail?id=24614&sort=-stars&colspec=ID%20Type%20Status%20Owner%20Summary%20Stars
 
And please ask around.
 
Jul 6, 2012 at 12:20 PM Post #159 of 253
I was looking for a way to output my Galaxy note with USB audio and came across this forum.
 
Very exciting news that Jellybean supports USB audio. 
 
I will have Fiio E17 by monday and install a test Jellybean SDK and see if it will do the magic.
 
Jul 6, 2012 at 12:22 PM Post #160 of 253
Quote:
I was looking for a way to output my Galaxy note with USB audio and came across this forum.
 
Very exciting news that Jellybean supports USB audio. 
 
I will have Fiio E17 by monday and install a test Jellybean SDK and see if it will do the magic.

 
The SDK is very bare bones Jelly bean. I doubt it includes the audio drivers. You'll need to install a proper jelly bean rom.
 
Jul 6, 2012 at 10:31 PM Post #164 of 253
I asked this question on anther thread but realize this might be a better place to ask this question.
 
I have an AT&T Galaxy SIII and I am looking for a portable DAC/AMP unit to use with it.
 
I read that most DAC's that use TI2706 USB receiver will work with the SIII and I just want to see if anyone here had successfully used the iBasso D-Zero (uses PCM2706) with the SIII.
 
I am trying to decide whether to buy the Fiio E7 or the iBasso D-Zero.
 
Thanks
 
Jul 6, 2012 at 10:52 PM Post #165 of 253
Quote:
I asked this question on anther thread but realize this might be a better place to ask this question.
 
I have an AT&T Galaxy SIII and I am looking for a portable DAC/AMP unit to use with it.
 
I read that most DAC's that use TI2706 USB receiver will work with the SIII and I just want to see if anyone here had successfully used the iBasso D-Zero (uses PCM2706) with the SIII.
 
I am trying to decide whether to buy the Fiio E7 or the iBasso D-Zero.
 
Thanks

 
Google answered:
 
http://www.head-fi.org/t/552014/pictures-of-your-portable-rig-part-xv/5535#post_8509186
http://www.head-fi.org/t/552014/pictures-of-your-portable-rig-part-xv/5550#post_8510418
 

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