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Android phones and USB DACs - Page 301

post #4501 of 5263
Quote:
Originally Posted by leonm12 View Post
 

yes the app supposed to work that way.

this is really good app for high end result since it lock the usb device and provide bit perfect playback.


I'm pretty sure the G2's stock/included LG music player app works in the same way, they supposedly spent substantial resources in making sure it bypasses all layers of Android OS audio processing according to a few of the reviews of the G2.

post #4502 of 5263
Does anyone have a Fire TV yet? I know it isn't a phone, but it would be killer if it works with high end dacs.

-Erik
post #4503 of 5263
Quote:
Originally Posted by MikeyFresh View Post
 


I'm pretty sure the G2's stock/included LG music player app works in the same way, they supposedly spent substantial resources in making sure it bypasses all layers of Android OS audio processing according to a few of the reviews of the G2.

 

 

no, it is not.

original player use down sample for usb output

post #4504 of 5263
Quote:
Originally Posted by leonm12 View Post
 

 

 

no, it is not.

original player use down sample for usb output


Where have you seen any specific reference to that?

 

I have only seen where LG states the player app was completely rewritten to avoid all layers of Android audio processing, which to me would indicate there is no down sampling occurring. But I don't know that for sure, simply that I've seen no specific reference to the contrary.

post #4505 of 5263
Quote:
Originally Posted by MikeyFresh View Post
 


Where have you seen any specific reference to that?

 

I have only seen where LG states the player app was completely rewritten to avoid all layers of Android audio processing, which to me would indicate there is no down sampling occurring. But I don't know that for sure, simply that I've seen no specific reference to the contrary.

tomorrow I am going to confirm it 100% by doing the following:

 

original music player (play 24/96 file) --> G2 (OTG) --> USB/SPDIF converter ---> DAC(support 16/44 only)

 

 

if sound come out from speakers then Android Audio processing down sample the signal.

 

now I explain why I suspect OS down sampling regardless above test:

 

when you play 24/96 file by G2 music player, you can hear the music coming out of USB DAC, but in addition you will hear the OS sound and additional application sound like GPS and etc...

this mean Andorind mixer (AudioFling) is in use and as far as I know it is working at 16/44.

in order to support native sample rate of 96 or 192 and  simultaneously play  multiple streams , some down/up sample has to be done.

the question is how it is implemented = probably by Android mixer...

post #4506 of 5263
Quote:
Originally Posted by leonm12 View Post
 

tomorrow I am going to confirm it 100% by doing the following:

 

original music player (play 24/96 file) --> G2 (OTG) --> USB/SPDIF converter ---> DAC(support 16/44 only)

 

 

if sound come out from speakers then Android Audio processing down sample the signal.

 

now I explain why I suspect OS down sampling regardless above test:

 

when you play 24/96 file by G2 music player, you can hear the music coming out of USB DAC, but in addition you will hear the OS sound and additional application sound like GPS and etc...

this mean Andorind mixer (AudioFling) is in use and as far as I know it is working at 16/44.

in order to support native sample rate of 96 or 192 and  simultaneously play  multiple streams , some down/up sample has to be done.

the question is how it is implemented = probably by Android mixer...


Interesting, LG has insisted their player app bypasses Android audio, it seems illogical that would only be through it's own on-board headphone output, but I guess that's possible, or maybe not even then?

 

What DAC will you use that is only 16/44.1 ? Is it also possible the phone would sense the DAC's limitation in the handshake and auto down sample because of that?

 

A better test might be with a 24/96 capable DAC if you have one available, that way you know the phone isn't defaulting to 16/44.1 due to detecting that as a DAC limitation in the handshake process. 

 

Additionally, I've never tried an S/PDIF converter being attached via OTG, it may or may not work depending on the power requirement. I have a Musical Fidelity V-Link 192, I could bring that to work to try with my friend's G2, however I have seen that unit give false LED sample rate readings when used with a W7 laptop and JRMC19, so I'm not sure I completely trust it, but that was likely an issue with it's Windows driver.

post #4507 of 5263

S/PDIF converter work the same way as USB DAC (on the digital aspect), it just bypass the digital signal instead of converting it.

the phone is unable to sense the DAC , since the USB converter support 24/192 and this is the only option the phone can sense. (anyway I will make sure 96 is bypassed with "USB PRO PLAYER").

 

the DAC is a car processor capable of CD quality only.

 

this test will give us better understanding..

post #4508 of 5263
Quote:
Originally Posted by leonm12 View Post
 

S/PDIF converter work the same way as USB DAC (on the digital aspect), it just bypass the digital signal instead of converting it.

the phone is unable to sense the DAC , since the USB converter support 24/192 and this is the only option the phone can sense. (anyway I will make sure 96 is bypassed with "USB PRO PLAYER").

 

the DAC is a car processor capable of CD quality only.

 

this test will give us better understanding..


Which S/PDIF converter do you have?

I can try the V-Link 192 but I don't know if it will draw too much power.

post #4509 of 5263
Quote:
Originally Posted by NZtechfreak View Post


I will, however I will need to properly sit down and compare them. That may take a couple of days between work and the twins (3 months old now) and organising NZs first headphone meet and maybe landing the clinical director job and thus even more work smily_headphones1.gif

Proceed at your leasure NZ.  As a fellow parent of twins, I completely understand.  Mine are almost four now, but I remember all of the exhausting details of their first six months.  Actually, a good portable rig was essential to help escape occasionally.

post #4510 of 5263
Quote:
Originally Posted by MikeyFresh View Post
 


Which S/PDIF converter do you have?

I can try the V-Link 192 but I don't know if it will draw too much power.

The FiiO E18 is a portable USB DAC/Amp that happens to have a coax SPDIF output. It draws no power from the phone's USB OTG. I've tested it driving a Bifrost Uber DAC as well as Focusrite DAC/ADC, etc device. It worked driving both DACs while connected to a GS3.

post #4511 of 5263
Quote:
Originally Posted by MikeyFresh View Post
 


Which S/PDIF converter do you have?

I can try the V-Link 192 but I don't know if it will draw too much power.

I am using super high end converter name Audiophilleo (with pure power)  -

 http://www.audiophilleo.com/

 

little bit expensive but worth the money. highly recommended!

 

you can use USB Hub or Y-OTG with external power input

post #4512 of 5263
Hey all!


Fiio E18 just came in, very happy with the sound with my ES3X. Only thing is..

When I play a track on my (Google Edition) GS4 (On 4.3) through USB, the seekbar just zips through every track - no matter what app I use to play music. When playing video files, it's like they are on "fast forward" with no audio playing.

Any ideas?

Worth noting, the E18 play/pause/skip track functions work perfectly, as well as the charge function (when on charge mode).

Thanks guys.

Edit: sometimes the notification bar swaps between "USB device connected" and "USB device disconnected" rapidly.
Edited by White Lotus - 4/9/14 at 10:18pm
post #4513 of 5263

I can't seem to  find any discussion of this anywhere in the thread, but has anyone tried the original Galaxy Note phone with any DAC using UARP/UAPP? I actually have the S3 and using it as a digital transport with my reference system, but my brother upgraded to the 5S last year and his Note has been in his drawer since. He's gonna give me the phone for free, so I was thinking if it works using UAPP I can get a dock for it too and permanently use that one with my system instead. The S3 will basically be completely just a phone (unless I have to charge the Note; I have spare batteries for the S3), while the Note will be on the dock when I listen then I'll take it out and use it for browsing the internet when I don't need a computer and keyboard for what I'm looking at (like 9Gag and Cracked before I sleep).

post #4514 of 5263
I have seen danba's list but can any end user confirm Sony PHA-2 works with Note 2 without much fuzz? Just ordered one, but if it doesn't work I will have to cancel the order frown.gif
post #4515 of 5263
Quote:
Originally Posted by White Lotus View Post

Hey all!


Fiio E18 just came in, very happy with the sound with my ES3X. Only thing is..

When I play a track on my (Google Edition) GS4 (On 4.3) through USB, the seekbar just zips through every track - no matter what app I use to play music. When playing video files, it's like they are on "fast forward" with no audio playing.

Any ideas?

Worth noting, the E18 play/pause/skip track functions work perfectly, as well as the charge function (when on charge mode).

Thanks guys.

Edit: sometimes the notification bar swaps between "USB device connected" and "USB device disconnected" rapidly.

Try swapping the cable. I had a similar problem, there was some dirt in the connection causing the USB connection to rapidly switch on and off, just putting the cable in and out a few times solved my issue.

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