Re: "LinuRe: [linux-audio-dev] plugin idea

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Subject: Re: "LinuRe: [linux-audio-dev] plugin idea
From: Steve Harris (S.W.Harris_AT_ecs.soton.ac.uk)
Date: Tue Mar 06 2001 - 13:16:13 EET


On Tue, Mar 06, 2001 at 02:29:49AM +0000, Iain Sandoe wrote:
>
> > On the other hand, for external gear, its much harder to discover the
> > delay introduced. So presumably some analysis method of some sort
> > would be required, preferably using a test tone.
>
> probably needs to be broad-band... e.g. a shaped pulse of some sort.
>
> The delay can then be found by a relatively straight forward
> cross-correlation and peak-position detect. Can do the cross-correlation by
> efficient process - e.g. FFT/cross-spectrum/FFT.

I was thinking of something much simpler, eg. just watching for a peak
over a certain threshold.

- Steve


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