[PD] Turn off env~?

David Sabine dave at davesabine.com
Fri Aug 2 04:36:09 CEST 2002

Hello all,

I assume that if env~ exists in a patch, it is active whether or not a signal is passing through it.  This means that env~ is using CPU even though it's input might be "zero"?

Is there some method of turning off env~ or perhaps change its window size dynamically so that it's not taking up so much CPU?

For example, I'm using [env~ 8192] to send a level to VU meters.  I've then created a spigot-like object that will cut the signal going to that [env~] in an attempt to save CPU power so that PD doesn't have to continually update the VU meters.  Like this:

[osc~] > [*~ 1/0 (depending on toggle)] > [env~ 8192] > [- 100] > [Vu meter]

However, even if the [osc~] is multiplied by "zero", CPU usage is still too high because [env~ 8192] is computing all the time (zero x whatever? over and over 5 times per second).  Is there some method of actually 'turning-off' the [env~] or perhaps change its windows size to [env~ 131072] for example when I don't need to see the VU?

Dave S
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