cyclone's [edge~] is useful for converting zero crossing to bangs:
[inlet~]
|
[expr~ $v1<0]
|
[edge~]
The only downside is that it quantizes to the end of the block, but then
again, so does [tabwrite~]. I actually attempted doing one with edge and
posted it on the forum, if you're interested.
http://puredata.hurleur.com/viewtopic.php?pid=14984#p14984
.mmb
Derek Holzer wrote:
I'm trying to put together a simple oscilloscope abstraction that
imitates the "trigger" function of a real one, so that the waveform
can be seen from its starting point. In other words, a [tabwrite~]
would graph on the upward swing of a zero crossing. To do this, I'd
like to know if there is an audio object which gives a bang at a zero
crossing, or perhaps even only at a crossing from the negative to the
positive domain of the signal. I've thought of something with [expr~
$v1 < 0], but what comes out is still in the audio domain and isn't
the bang which [tabwrite~] needs.
Other suggestions welcome.
best!
Derek
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