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Digital audio quality of modern Android Devices via USB-output from hi-res sources?

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Aug 31, 2018
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#1
Has anybody measured the digital output of Modern Android phone / tablet devices (say Android 10 or later) from the USB output using hi-resolution lossless sources (like 24-bit / 96+ kHz FLAC sources)?

- Does the Android audio subsystem digital USB output allow for bit-perfect (non-resampled) output?
- Are there any issues with certain manufacturers or Android versions?

Or can I just go and pick the cheapest Android 10+ tablet, cram in a 1TB microsdcard and use it to stream hi-res 24b/96kHz content (via USB, NOT wireless) to an external DAC (and then to the audio reproduction system)?

Would love to hear from anyone who has experimented with this, and especially if they've tested whether the digital output remains bit-identical to the source files.
 

Joachim Herbert

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#2
Depends on the Player used. Some like usb audio player work around the android sound subsystem, others do not.
 
OP
H
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Thread Starter #3
Depends on the Player used. Some like usb audio player work around the android sound subsystem, others do not.
So, if one is using a Streaming app, then one is tied to the intricacies of that streaming app and no way to know, right?

Do you know of the android audio usb sub-system has changed recently in Android 10-11? Any differences in regards to which Android version to use?
 

ZolaIII

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#4
So, if one is using a Streaming app, then one is tied to the intricacies of that streaming app and no way to know, right?

Do you know of the android audio usb sub-system has changed recently in Android 10-11? Any differences in regards to which Android version to use?
Nothing changed for quality a while, Android support USB Audio 2.0 long time now (from Android 7 as I can remember). Implementation varies from manufacturer to manufacturer and it's not bit perfect (usually resasempled to 44100/48000). There are players which come with their own costume USB Audio 2.0 driver's and suport bit perfect output (to limitations of driver or DAC) like: HiBy, Shanling, FiiO, HF, UAPP, Neutron... You usually need to enable usage of custom driver. Some are free and some are paid. Additional futures vary (streaming services suport, remote control, EQ's and cetera).
 
OP
H
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Thread Starter #5
Any idea about LG phones with QuadDAC? Some of those can be had for quite cheap now that LG is exiting the mobile phone business? Would make a nice player (on the go with headphone output and stationary with USB-output) esp. if the USB-digital output is not 48kHz resampling.
 

Cahudson42

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#6
Amir tested the G7 Quad DAC. It did quite well:
https://audiosciencereview.com/foru...o-measurement-of-lg-g7-thinq-smartphone.4468/

Be sure to plow thru the entire thread. The LG Quad DACs have some annoying 'nanny' output limitations, but they are easy to work around.

I currently use an LG V20 to drive a Liquid Spark for my HE5XX. The V20 replaced a D10/Fire tablet combo.

If you just use USB, a $30 LG Rebel TracFone running Android 8 will likely work fine as a wifi streamer. I use one with a three wire otg USB cable (usually powered) to drive a Qudelix 5k. Works great.
 
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