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Android phones and USB DACs - Page 476

post #7126 of 7131
Yes rooted and expert mode.

But what it has to do with expert mode?
post #7127 of 7131
Quote:
Originally Posted by jared basshead View Post

Yes rooted and expert mode.

But what it has to do with expert mode?


Not sure. Just checking.:) 

I am using busybox.


Edited by Hawaiibadboy - 8/24/15 at 7:58pm
post #7128 of 7131
Quote:
Originally Posted by StanD View Post
 

It's a passive device, if its impedance doesn't load the DAC output then you are good to go. Unfortunately they don't spec the resistance of the potentiometer or the taper. You need an audio taper stereo potentiometer. Probably around 1 K Ohm would work well.

 

Thank you for helping with the suggestions.

I did a small amount of research on potentiometers.  It looks like the majority of the higher end ones use a much higher ohm rating than 1k?

Here are the specs of my current equipment.  Will this help confirm your suggestion of 1k ohm potentiometer?

 

Behringer UCA202 USB DAC:

Output impedance - 400 ohms

 

to

 

Alpine PXA-H800 car audio processor:
Input Impedance: 10k ohms or higher

 

The volume control would go between these two devices.

post #7129 of 7131
Quote:
Originally Posted by CZ Eddie View Post
 

 

Thank you for helping with the suggestions.

I did a small amount of research on potentiometers.  It looks like the majority of the higher end ones use a much higher ohm rating than 1k?

Here are the specs of my current equipment.  Will this help confirm your suggestion of 1k ohm potentiometer?

 

Behringer UCA202 USB DAC:

Output impedance - 400 ohms

 

to

 

Alpine PXA-H800 car audio processor:
Input Impedance: 10k ohms or higher

 

The volume control would go between these two devices.

Most DACs that I am familiar with have an impedance below 100 Ohms. This is not a connection to a headhone that requires damping,8:1 ratio.  A combined load impedance of 1K Ohms pot and 10K Input impedance would represent a 3.2 dBV loss, a higher resistance pot would be less. As the resistance of the pot approaches 10 K (the Alpine) the audio taper of the pot changes, so you can't go too high.

Using a 2 K Pot.

Combined load to amp: 1666.7 Ohms.

Loss: 1.9 dBV

That should be acceptable.

post #7130 of 7131

Is the Galaxy Note N7000 capable of usb audio? I have Omnirom Kitkat on mine. Got my usb disk working with an otg cable. I couldn't get my ODAC to work with various recommended usb apps. I tried it as is and powered by a powerbank via y cable. It didn't work.

post #7131 of 7131

Apparently it isn't:

 

Android USB audio

http://www.head-fi.org/t/595071/android-phones-and-usb-dacs

http://www.head-fi.org/t/595071/android-phones-and-usb-dacs/7035#post_11822387

 

A list of USB Audio Player PRO resources (compatible USB DAC, compatible Android devices, ...):

http://www.extreamsd.com/index.php/2015-07-22-12-01-14/usb-audio-driver

 
NOT WORKING ANDROID DEVICES
  Galaxy Note 1  
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