Re: [LAU] About Algorithms

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From: David Adler <david.jo.adler@...>

To: linux-audio-user <linux-audio-user@...>

Subject: Re: [LAU] About Algorithms

Date: Monday, July 18, 2011 - 10:43 am

On Mon, Jul 18, 2011 at 12:13 PM, Renato wrote:

quoted text

> On Mon, 18 Jul 2011 11:53:47 +0200

...

quoted text

> isn't it useless going way above 24 bits, since that's what in the end
> the DAC (sound card) will use? as far as I can remember, delta-sigma
> DACs don't go over 24 bit, do they?
>

More than 24 bit for DAC/ADC is useless, going above 24 bit for
internal processing is not. The latter ensures that rounding errors
that may be introduced by multiple math operations disappear when bit
depth is finally reduced again to 24 before entering the DAC.

The magnitude of rounding errors depends on the type and number of
operations done. I don't know the limits, but for what Fons calls
"normal audio engineering practise" (see his posting above), 32 bit is
enough.

cheers,
d
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Messages in current thread:

[LAU] About Algorithms, Moshe Werner, (Sat Jul 16, 11:03 pm)

Re: [LAU] About Algorithms, lorenzo cecchi, (Mon Jul 18, 10:40 am)

Re: [LAU] About Algorithms, Fons Adriaensen, (Mon Jul 18, 2:46 pm)

Re: [LAU] About Algorithms, Fons Adriaensen, (Sun Jul 17, 8:45 am)

Re: [LAU] About Algorithms, Ken Restivo, (Wed Jul 20, 3:39 am)

Re: [LAU] About Algorithms, Dale Powell, (Sun Jul 17, 11:25 am)

Re: [LAU] About Algorithms, Paul Coccoli, (Mon Jul 18, 9:55 pm)

Re: [LAU] About Algorithms, Folderol, (Mon Jul 18, 10:03 pm)

Re: [LAU] About Algorithms, Charles Henry, (Tue Jul 19, 3:52 am)

Re: [LAU] About Algorithms, Moshe Werner, (Tue Jul 19, 3:24 pm)

Re: [LAU] About Algorithms, Paul Davis, (Tue Jul 19, 2:54 am)

Re: [LAU] About Algorithms, Paul Coccoli, (Tue Jul 19, 9:47 pm)

Re: [LAU] About Algorithms, Dale Powell, (Wed Jul 20, 4:53 pm)

Re: [LAU] About Algorithms, Paul Davis, (Tue Jul 19, 9:57 pm)

Re: [LAU] About Algorithms, Moshe Werner, (Mon Jul 18, 6:40 am)

Re: [LAU] About Algorithms, Moshe Werner, (Mon Jul 18, 7:19 am)

Re: [LAU] About Algorithms, Erik de Castro Lopo, (Mon Jul 18, 7:38 am)

Re: [LAU] About Algorithms, David Adler, (Mon Jul 18, 9:53 am)

Re: [LAU] About Algorithms, Erik de Castro Lopo, (Mon Jul 18, 10:53 am)

Re: [LAU] About Algorithms, Fons Adriaensen, (Mon Jul 18, 2:56 pm)

Re: [LAU] About Algorithms, David Adler, (Mon Jul 18, 11:56 am)

Re: [LAU] About Algorithms, Erik de Castro Lopo, (Mon Jul 18, 12:11 pm)

Re: [LAU] About Algorithms, Fons Adriaensen, (Mon Jul 18, 3:01 pm)

Re: [LAU] About Algorithms, Paul Davis, (Mon Jul 18, 3:02 pm)

Re: [LAU] About Algorithms, Fons Adriaensen, (Mon Jul 18, 3:12 pm)

Re: [LAU] About Algorithms, David Adler, (Mon Jul 18, 12:14 pm)

Re: [LAU] About Algorithms, Renato, (Mon Jul 18, 10:13 am)

Re: [LAU] About Algorithms, David Adler, (Mon Jul 18, 10:43 am)

Re: [LAU] About Algorithms, Erik de Castro Lopo, (Mon Jul 18, 10:57 am)

Re: [LAU] About Algorithms, David Adler, (Mon Jul 18, 12:01 pm)

Re: [LAU] About Algorithms, Stephen Stubbs, (Sun Jul 17, 2:17 pm)

Re: [LAU] About Algorithms, Dale Powell, (Sun Jul 17, 3:25 pm)

Re: [LAU] About Algorithms, Erik de Castro Lopo, (Sun Jul 17, 8:31 am)