USB DAC support - Samsung Galaxy Nexus

Hi all,
This is my first post / thread, let me start by saying thanks to all of you !
I am another happy owner of a nexus phone
Our official android 4.1 version does not support USB DACs, and perhaps we can all ask for support at code dot google
Many audiophiles and headfiers already own USB DACs. Think of them as ‘sound cards’ or ‘USB audio devices’ . DAC is actually an acronym for Digital to Analog Converter. And ‘usb audio’ is a standard as you can see in usb dot org
I can do some alpha / beta testing if any new image with usb audio support enabled comes up, just let me know. Or feel free to suggest any other way of enabling usb audio.
I am not talking about android-only docking stations but regular hifi DACs. There are even portable DACs to take with you on road !
™

+1
Also to have this link to keep track of the issue: http://code.google.com/p/android/issues/detail?id=24614

mengsuan , Thank you for providing a link to code dot google, I am a newbiew so I can’t post links yet.
S III seems to be the best choice right now for audiophiles on the road
To tell you the truth I expected all 4.1 phones to support usb audio out of the box. It was my fault, I should have read the articles referring to usb audio support better.
Hopefully the community will help and provide some custom image for Galaxy Nexus even before google does.

Related

The HDTV Frame station could it be used as TV-out device for PDAs??

Hi guys ...
when you plan to buy a full-feature pocket pc and tried to search within the latest released models at least you find one or two feautres missing that will ruin your plans ..
I was lookingforward to own the HTC HD , it has all the specs I want except the TV-out ?!!
I don`t know why they didn`t include it like the previous model touch pro , any way I seached the web looking for what you can say an external TV-out that could be plugged to USB port ..and found one in this site : http://fashionstar.en.alibaba.com/p...48/HDTV_Frame_Station/HDTV_Frame_Station.html
so as I mentioned before in the topic , will it work with pocket pcs cause they said in the their website :USB interface:Can be connected to U-Disc,Camera,Mobile,etc...
thanks in advance //
no replies until now !!
maybe..
if the tv works as usbHost it should be able to access the mass storage controler and access the media
but it would be the tv desiding what it could play in terms of video and music and powerpoint and the likes
and i would prob not depend on most tv's being able to support that much and
maybe not at a high fps
so it's really not any more tvout for the device then it's a tvout for something like
an usbKeyring with memory
I`ve uploaded the PDF file describing the features ..
tigernight said:
I`ve uploaded the PDF file describing the features ..
Click to expand...
Click to collapse
After take a look at the manual, it looks like it can access the multimedia files stored on your PDA and play them.
This is different to a TV-out PDA, that plays on a TV an exact replica of what presenton the PDA screen.

[Q] Enable USB audio out in kernel

I want to use a tablet as my car head unit, iPads are able to use usb for a digital audio output, I can't post the video yet but there is one on youtube detailing what they use in a iPad car install
Could someone add the functionality to a GNexus CDMA kernel for me to try out in wiring up my stereo? Here is an ongoing discussion to get it enabled on all 4.0.X devices by google but again I can't post the link for the discussion or to vote on the google page.
bump to top
USB audio works on my Allwinner A10 tablet witn "Unofficial CyanogenMod 9 for many AllWinner A10 tablets" firmware from Christian Troy

[Q] Nexus 7 Multi Channel/Surround Sound with USB DAC

Hi.
I want to playback sound from my Nexus 7 2013 (Flo) in a fixed install environment on a Mutli Channel USB Audio DAC. It is a 7.1 Channel device and has a CMedia CM6206 chip. I currently use the stock Android 5.1.1 build LMY47V.
From what I've read a multi channel source, e.g. a movie, should play fine, but the difficult part seems to be the spreading of stereo sound onto multiple channels. After reading through different articles related to ALSA I finally found an example configuration which does exactly what I need:
http://drona.csa.iisc.ernet.in/~uday/alsamch.shtml
Sadly it is for Linux Desktop Editions and Android seems to be quite different (Driver Layer, Configuration ...). After figuring that out I came across this thread:
http://forum.xda-developers.com/google-nexus-5/themes-apps/mod-surround-sound-t2964809/post57310487
Where I finaly found the place the mixer configuration would probably go to. But now I'm stuck on translating the .acoundrc file into the right XML statements. This is where I want to ask the experts here on XDA Developers...
What I got so far:
- Device is rooted
- Alsa Mixer is installed
- Example .asoundrc
The USB DAC enumerats (with alsa_aplay -L) as "default:CARD=Device" or as (with alsa_aplay -l) "card 1".
Thanks and best regards,
Martin.

native DSD output via HDMI on Shield TV

Hello fellow Android TV users,
if you care about DSD (arch enemy of PCM ) on android in general and on Google TV set-top boxes in particular, head over to https://issuetracker.google.com/issues/73956275
and comment or upvote (star button) my feature request :highfive:.
Regards,
Nexus-3
bug URL not working atm
The bugtracker URL mistakenly converted itself into an internal bug, which means that it can no longer be accessed publicly (though two people could reach and comment it so far ).
I have contacted Google and requested that report no. 73956275 to be made public again. As soon as this is been done, I'll let you know.
In the mean time you could sideload (install APKs manually) some audio players with DSD support (at this moment stereo PCM output only):
play.google[DOT-COM]/store/apps/details?id=com.hiby.music
play.google[DOT-COM]/store/apps/details?id=com.neutroncode.mp
play.google[DOT-COM]/store/apps/details?id=com.extreamsd.usbaudioplayerpro
Thanks for your patience
The waiting is over
Good evening folks,
I am happy to report that the bug tracker URL is accessible again :good::victory:.
Feel free to upvote (star button) or comment !
I've found a way to enable bit perfect playback even with DSD files on the Nvidia shield TV:
How to setup the Nvidia Shield Pro as a Bit Perfect Audio Streamer/Player – Tech by ASK
techbyask.com

Shield 2019: Enabling audio passthrough using USB audio protocol UAC2

I have the newest model Shield I believe:
Android ver. 9
SW version: 8.2.2(32.6.509.0)
Kernel ver: 4.9.140-tegra ...
Description: Tegra X1 + mDarcy
While there is audio passthrough via HDMI, USB audio output fixes the bitrate at 16/48 or 16/192 in high quality mode. I have a semi high-end hi-fi setup with good DAC where you want an 'untouched' audio bitrate and 24 to 16 bit downsampling is rather unattractive . I have been looking at: https://source.android.com/devices/audio/usb It appears that using isochronous mode is universally standard, but the sub mode on most Android devices, including the Shield, is set to Adaptive when it needs to be Asynchronous sub mode to do this. I can't find any online source with an kernel mode setting to do this. I am not even sure I am on the right path here.
Any insights, references, tips, or better yet some ADB command line code?
Thanks,
p-we
Hi there - where did you land on this? Thanks!
Never took off...
p-we said:
Never took off...
Click to expand...
Click to collapse
Still no take-off or did you manage something with this? I'm in the exact same hi-fi boat
I did find that sideloading UAPP (USB Audio Player Pro, will cost you 8 dollars or so) on the shield technically works and it can play audio without any re-sampling done (my dac shows the sample rate changing when songs have different sample rates so I know it works), even stream from Qobuz / Tidal, but the UX is pretty much unusable since it's not an Android TV app lol
binasnotatie said:
Still no take-off or did you manage something with this? I'm in the exact same hi-fi boat
I did find that sideloading UAPP (USB Audio Player Pro, will cost you 8 dollars or so) on the shield technically works and it can play audio without any re-sampling done (my dac shows the sample rate changing when songs have different sample rates so I know it works), even stream from Qobuz / Tidal, but the UX is pretty much unusable since it's not an Android TV app lol
Click to expand...
Click to collapse
I've not looked into the USB sub mode since I first looked into it and posted in 2021.
Good idea on UAPP which I am familiar with USB-C on android mobile. Might play around with that as I think I'm already good for the $8. It's indeed a pain when Android apps don't use the Google/Android TV remote system.
I've since solved the problem for my hi-fi audio purity 'fix' by moving to Roon which provides flawless high res audio (via network to an RPi's USB 2.0 audio output) and is controlled by mobile phone via the Roon Remote app. Now if Roon would only make an Android TV compatible remote app the Nvidia Shield would be a great UI experience and the USB output wouldn't matter anymore.
So for what it's worth, over at the Nvidia forums one of the staff members confirmed that this is on their 'to-do-list' so with a bit of luck we can see this fixed in the next Shield update
https://www.nvidia.com/en-us/geforce/forums/shield-tv/9/520414/match-content-audio-resolution-for-usb-audio/3359083/

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