Subject: Re: "LinuRe: [linux-audio-dev] plugin idea
From: Iain Sandoe (iain_AT_sandoe.co.uk)
Date: Tue Mar 06 2001 - 13:45:05 EET
>> > 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.
that's fine too. sophistication (and X-corr isn't really *that*
sophisticated) depends on how accurately you want it - and how much immunity
to the processes in the outboard gear.
ciao,
Iain.
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