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Does Foobar's Volume Control Degrade Sound? - Page 2

post #16 of 29
Thread Starter 
Hmm... AOS had this to say... http://www6.head-fi.org/forums/showp...9&postcount=25
post #17 of 29
Quote:
Originally Posted by Zoide
doesn't matter if the DACs are only 24-bit. All the math is being done at 64 bits which means you don't have all the truncating and rounding issues inside the DSP. At the output to the DACs you just round off or dither down to 24 bits.
post #18 of 29

My question: Which would degrade sound more (or make the output more bit-imperfect), assuming i'm using asio4all and nuforce HDP dac/amp?

 

a) lowering the foobar volume. 

b) lowering system volume

 

the reason i'm asking is because when i connect my very sensitive westone UM3x to the HDP, the volume become very high far too quickly. Thus, i need to lower the digital volume input somehow so that i have more leeway to adjust the volume pot on the HDP. Now i'm not sure if i should lower foobar volume or system volume.

post #19 of 29

wow a 6 year old thread deadhorse.gif.

 

foobar and pc volume control is all digital meaning you reduce the volume you loose bit's , but you can get away with having the volume set to 95% in the pc and foobar without loosing sound quality.

post #20 of 29

Both reduce SQ. Better have a steady hand while adjusting analog volume. Don't touch digital settings and leave them at 100%, not 99, not 98, not anything below 100% or SQ will be degraded.

 

Zombie thread? biggrin.gif

post #21 of 29

Another necro :cool:

 

Don't agree with you guys. If the volume control is a proper implemented 64-bit volume control you won't loose anything in sound quality.

post #22 of 29

The 100% master volume in windows is Wrong, It should be 0dB level Volume, which is not always 100%

post #23 of 29
It isn't? How so?
post #24 of 29
post #25 of 29

I'd slightly attenuate foobar's output for this reason: http://www.gearslutz.com/board/tips-techniques/334385-intersample-peaks.html

post #26 of 29
Quote:
Originally Posted by davidsh View Post
 

Another necro :cool:

 

Don't agree with you guys. If the volume control is a proper implemented 64-bit volume control you won't loose anything in sound quality.

It doesn't matter since the samples have to be quantized to 24 bits eventually, or just 16 bits if that is all your DAC accepts.

Even if the digital volume control was implemented with 128-bit floating point: If you DAC achieves, let's say, 18 bit performance and you attenuate by 12 dB (= 2 bits) you're down to 16 bit performance.

 

Still not a big deal unless you have a lot of extra gain in your chain (and therefore need to attenuate digitally a lot...)

 

Quote:
Originally Posted by sonci View Post
 

The 100% master volume in windows is Wrong, It should be 0dB level Volume, which is not always 100%

Will post in your thread.

post #27 of 29

Theoretically it will, but it's absolutely nowhere within the audible range of humans.

 

Plus, there could be benefit to be had from having the amplifier at max volume and using the software control with regards to difficult-to-drive headphones. Keeping the amp at max volume should maximize its current output while the software control keeps the gain low. This is just a guess though, don't quote me on it.

post #28 of 29
Class a mono block with no pre-amp, just digital volume -> DAC -> amp.
That'd be part of my dream rig.
post #29 of 29
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