QUOTE(noobandroid @ Jan 5 2013, 12:11 AM)
i wonder why the 24bit cricri+ could not work with the s3 otg, is it cause of the fact that it is a 24 bit device or something?
The Galaxy S3 can work with the 24bit ODAC.I think the USB audio driver of the Galaxy S3 is intolerant with USB DACs which are not quite conform to the USB specification.
http://www.head-fi.org/t/595071/android-ph...30#post_8910009
You should test the interworking S3 - 24bit cricri+ with the USB Audio Recorder PRO app.
https://play.google.com/store/search?q=usb+...io+recorder+pro
The USB Audio Recorder PRO app includes its own USB audio function.
The eXtream Software Development solution does audio over the USB without using the USB audio implemented in the Linux kernel (i.e. no need to request Google / Android device manufacturers to implement standard USB audio on USB host-capable Android devices).


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
Added on January 6, 2013, 11:19 pm
QUOTE(wkkm007 @ Jan 5 2013, 12:50 AM)
. Stock Google Nexus 7 & USB audio at the user space:http://www.extreamsd.com/USBAudioRecorderPRO/
music stored on stock Nexus 7 > USB Audio Recorder PRO music player > digital USB audio out >> USB OTG cable >> USB DAC >> amp >> headphones
. Custom Google Nexus 7 & USB audio at the kernel space:
http://www.head-fi.org/t/627459/use-a-stan...p-by-step-guide
music stored on custom Nexus 7 > legacy music player > digital USB audio out >> USB OTG cable >> iBasso D10 USB DAC/amp >> headphones


Samsung Galaxy Note II & Ray Samuels Audio The Intruder, fully balanced amp / USB DAC:
http://www.raysamuelsaudio.com/products/intruder
http://www.head-fi.org/t/640209/modified-b...eyerdynamic-t5p
http://www.6moons.com/audioreviews/balance...phones/one.html
http://www.head-fi.org/t/445591/how-balanc...ed#post_6016338
http://www.head-fi.org/t/633511/pictures-o...20#post_9018661
Galaxy Note II > digital USB audio out >> balanced RSA Intruder USB DAC / amp >> balanced Beyerdynamic T5p








Balanced mode

Normal mode
A list of stock Android-powered devices reportedly interworking with standard USB DAC and a list of standard USB DAC reportedly interworking with the stock Samsung Galaxy Note II / S III are updated at the 1st post:
http://forum.lowyat.net/topic/2222840
This post has been edited by DanBa: Jan 7 2013, 12:27 AM
Jan 6 2013, 11:00 PM

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