Hi Mike, Roman,
thanks for the input! Of course I thought it would be simpler, but I did keep in mind this block boundary problem. [edge~] is a good suggestion, at least that's the kind of object I was looking for. I'll have a look at your forum patch tomorrow Mike (assuming I can find my login for the forum). The block issue, well that's another story...
best! Derek
Mike Moser-Booth wrote:
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