audio to trigger

[Arthur Harrison]

I've also heard this called a "non-retriggerable multivibrator." 
The 4538 has two in one package.

-Art

-----Original Message-----
From: Haible Juergen <Juergen.Haible at nbgm.siemens.de>
To: DIY <synth-diy at mailhost.bpa.nl>; Paul Perry <pfperry at melbpc.org.au>
Date: Thursday, December 10, 1998 3:42 AM
Subject: AW: audio to trigger


> >Also, if you go 555, you can have a 'refractory' period (it
>triggers, but then 
> >cant trigger again for a fixed period). Using a comparator to
>trigger a
> >fixed period 
> >555 you cd probably run off the raw audio & have very few parts.
> >
> >paul perry melbounre australia
>
>This is essentially what I meant with the "monoflop" method.
>All the audio tracks on my homepage are sync'ed like
>that. Only that I have used a SSM2056-based envelope
>generator for the monoflop (just because it was there in
>the modular - it will surely work with a simple 555 as well !)
>You must adjust the "on"-time manually to fit yout beat
>rate (approximately), but then it works excellent, even when 
>triggered from sounds that vary in amplitude.
>(which is a problem when you work with envelope detector)
>
>JH.
>