Re: [LAU] FOSS Ethernet Soundcard

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From: <fons@...>
To: <linux-audio-user@...>
Date: Tuesday, November 24, 2009 - 10:23 am

On Tue, Nov 24, 2009 at 10:15:05AM +0100, Florian Faber wrote:

> >> So I will plug this into my ethernet and have < 1ms latency? :)

It's not the AD/DA conversion that introduces most of the delay.
At 44.1 or 48 kHz the antialiasing filters are the main cause
of delay. A linear phase filter with a transition band of 1khz
(e.g. unity gain up to 21 kHz and near zero at 22 kHz) must
have a delay of around 1/1kHz or 1 ms.

Short delays are possible at 96 kHz, where you can have full gain
up to say 28 kHz going down to zero at 48 kHz. That's a range of
20 kHz, corresponding to 0.05 ms. It's one of the few advantages
of higher sample rates (but only if you don't use the full band-
width).

Ciao,

--
FA

Io lo dico sempre: l'Italia è troppo stretta e lunga.

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Messages in current thread:
[LAU] FOSS Ethernet Soundcard, Folderol, (Mon Nov 23, 8:28 pm)
Re: [LAU] FOSS Ethernet Soundcard, Peter Plessas, (Tue Nov 24, 1:04 pm)
Re: [LAU] FOSS Ethernet Soundcard, Thomas Vecchione, (Tue Nov 24, 3:06 pm)
Re: [LAU] FOSS Ethernet Soundcard, Atte André Jensen, (Tue Nov 24, 10:18 am)
Re: [LAU] FOSS Ethernet Soundcard, david, (Tue Nov 24, 11:07 am)
Re: [LAU] FOSS Ethernet Soundcard, Florian Faber, (Tue Nov 24, 10:26 am)
Re: [LAU] FOSS Ethernet Soundcard, Kevin Cosgrove, (Tue Nov 24, 7:12 pm)
Re: [LAU] FOSS Ethernet Soundcard, Hans Wilmers, (Tue Nov 24, 10:37 am)
Re: [LAU] FOSS Ethernet Soundcard, Kevin Cosgrove, (Tue Nov 24, 7:15 pm)
Re: [LAU] FOSS Ethernet Soundcard, Kevin Cosgrove, (Tue Nov 24, 7:14 pm)
Re: [LAU] FOSS Ethernet Soundcard, Florian Faber, (Tue Nov 24, 7:25 pm)
Re: [LAU] FOSS Ethernet Soundcard, Kevin Cosgrove, (Mon Nov 23, 9:25 pm)
Re: [LAU] FOSS Ethernet Soundcard, Folderol, (Tue Nov 24, 8:27 pm)
Re: [LAU] FOSS Ethernet Soundcard, Karl Hammar, (Tue Nov 24, 9:25 am)
Re: [LAU] FOSS Ethernet Soundcard, Ken Restivo, (Sun Nov 29, 4:25 am)
Re: [LAU] FOSS Ethernet Soundcard, Lorenzo, (Tue Nov 24, 8:44 am)
Re: [LAU] FOSS Ethernet Soundcard, Karl Hammar, (Tue Nov 24, 10:08 am)
Re: [LAU] FOSS Ethernet Soundcard, Lorenzo, (Tue Nov 24, 10:16 am)
Re: [LAU] FOSS Ethernet Soundcard, Arnold Krille, (Tue Nov 24, 9:10 am)
Re: [LAU] FOSS Ethernet Soundcard, Florian Faber, (Tue Nov 24, 9:15 am)
Re: [LAU] FOSS Ethernet Soundcard, , (Tue Nov 24, 10:23 am)