Hi guys,

I'm working on a small patch that outputs a bang once a specific incoming pitch has been detected (to trigger an audio file for example). My problem is that I only want the action triggered once within a given time frame.. e.g. 2 seconds.. So say the same specific pitch is detected more than once within 2 seconds, the idea would be to output the bang ONLY ON THE 1ST PITCH... and then after these 2 seconds if this pitch is then re-detected the bang would then be triggered again, with the same 2 second buffer... and so on and so on...

Does this make sense??? I guess I'm looking for some kind of gating or buffering device to prevent the premature re-triggering of an event.

Any help or suggestions welcome!!

input
| [r $0-on]
[spigot 1]
[t a b b]
| | "0"
| |
| [delay 2000]
| "1"
|
output

Here's one approach using [select], [delay], and a vanilla version of [gate] (just 'cuz). Once a note goes through the first gate outlet (the "thru" outlet, so to speak), it triggers a [delay], redirects input to the second outlet of the gate (the "conditional" outlet), and sets up the argument in the [sel] object. This is where the conditional part takes place. If a new note doesn't match the argument, it is sent out it's left outlet and the [delay] is retriggered. If no new notes pass through after two seconds, the [delay] triggers the gate to redirect messages back out its first inlet.

This way assumes you only want to suppress repeated notes within a two second time frame. New notes are not blocked. I don't know if this is the most elegant solution; it's just the first one that comes to mind.

http://www.pdpatchrepo.info/hurleur/repeat_limiter.mmb.pd

Thanks claudiusmaximus and maelstorm.. both of these solutions are perfect for what I need!!!

have a look at [change]