Hallo,

I made an *almost* Pd vanilla version, that performs really well. It's "almost" because it requires an operation, that currently is an external, but Miller has expressed his intention to include it in one of the next versions here: http://lists.puredata.info/pipermail/pd-list/2009-08/071538.html

The external required in the attachment is called "tabwriteat~" ad it is the signal-equivalent to [tabwrite], i.e. it writes a number into a table at a position specified by a signal. This is immensly useful in many cases and sorely missing from Pd since a long time. Finding the peak of a signal is one possible application. tabwriteat~ is so useful because it add a little bit of recursion to in-block processing as you can store intermediate results into a table and read it again in the next sample of the same block.

For peak-finding the algorithm thenn becomes very simple: Just find the peak between two samples with [max~], store the maximum in a table with [tabwriteat~] and reuse the table's value in the next comparison.

Check out findpeak~.pd in the attachement, which also includes source and a linux binary of tabwriteat~. Hopefully Miller includes it soon under whatever name (poke, poke ...) :)

Ciao

ypatios hat gesagt: // ypatios wrote: