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Subject: Re: Silence detection
From: kurzhaarrocker (phil_at_carangg.de)
Date: 2004-01-05


On Sat, 03 Jan 2004 20:33:04 +0100, "Martin Borus" <martin_at_borus.de>
wrote:
>For tape recordings, there's something else missing in my opinion:
>You have start, stop and rearm. This way you could lose bits of "silence" between
>the tracks. If you want to keep the original recording length in any case, a third
>option might be needed:
>
>In my example I would set the the
>Start above [-30db]
>for at least [1s]
>Stop below [-60db]
>for at least [15s]
>
>and add these options:
>
>Activate Split below [-40db]
>for at least [1s]
>after at least [90s]
>
>Activate Split should work in a way that when the Split is activated, the next time
>the start rule would apply again a split is made - using the start prerecording

Somehow I don't have a good feeling with that aproach of volume
triggered splitting. You have specified another threshold that
virtually does the same as the stop threshold: detect the begin of
silence. Do we really need to detect different levels of silence for
splitting and stopping?

As for the "split after at least n seconds" parameter - it sholdn't be
necessary. I consider it as a attempt to fix something that should be
fixed by setting the other trigger parameters properly. Somehow it is
the specification of a minimal song lenth. But the problem that this
parameter is supposed to fix is something else: avoid to detect
silence by error. That can occur after the minimal song length too. So
this parameter doesn't really fix the problem.

I like that parameter "Activate split when silence for at least n
seconds" though. I just don't know how to find an appropriate name to
fit it onto the screen. Maybe something like "Min Gaptime" which can
be set to off, too.

Phil



Page was last modified "Jan 10 2012" The Rockbox Crew
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