volume control

Need help with MPD?
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tomr1
Posts: 1
Joined: January 20th, 2014, 9:38 pm

volume control

Post by tomr1 »

How serious is the loss of resolution when using the MPD volume control?

Rasi
Forum team
Posts: 141
Joined: January 16th, 2013, 7:29 pm

Re: volume control

Post by Rasi »

same as everywhere? you lose 1 bit for each 6 db... thats just the nature of digital volume. Just don't go below 50%. even then you most likely wont hear a difference :)

nautibuoy
Posts: 2
Joined: November 21st, 2014, 6:49 am

Re: volume control

Post by nautibuoy »

No, not the same as everywhere, for example;

http://www.esstech.com/PDF/digital-vs-a ... ontrol.pdf

Its been many years since I programmed or worked with Unix for a living so I have no currency and the Linux ecosystem is quite unfamiliar to me so please excuse any ignorance on my part if I ask if there is any ambition to develop a non-truncating/'lossless' digital volume control for mpd?

For background, I'm working on an audiophile DIY networked DAC based around a Beaglebone Black and a driver distribution developed on the DIY Audio site;

http://www.diyaudio.com/forums/twisted- ... river.html

Cheers

Ray

rhoering
Posts: 68
Joined: August 11th, 2014, 2:12 pm

Re: volume control

Post by rhoering »

Thanks nautibuoy,

The ESS slide deck is a good one. It is one of the reasons folks like the Sabre DAC story.

Ron

nautibuoy
Posts: 2
Joined: November 21st, 2014, 6:49 am

Re: volume control

Post by nautibuoy »

Yes, and I'm currently putting together a DAC that uses the top level Sabre 9018 chip, which includes their 32bit volume control, but to me it seems obvious that a similar 'lossless' volume control earlier in the chain would be so much more flexible and would deliver the same capability to non-Sabre DACs.

Here's a current, if rather pricy, example of that sort of functionality;

http://www.abc-pcb.com/?page_id=192

No idea what software is embedded inside but it illustrates the point nicely.

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