ElapseGraph
Jan 21 2006 | 1:27 am
Hi List,
Recently, a friend of mine asked me about how to graph the envelope of
an audio input over time. This week's example comprises my answer, a
patch that gives a visual read-out of the signal envelope over a
specified time interval.
This patch is especially useful for those of you who are interested in
using envelope-following to modulate some other parameter, and would
just like to know what kind of data you're working with. I chose to use
an aesthetic based around the familiar function UI-object.
Besides demonstrating a way to roll your own heart-monitor, it also
shows some techniques for doing simple procedural animation using OpenGL
sketch messages and matrix data.
I hope you all enjoy, and have a great weekend.
Happy Patching!
Andrew B.
Cycling '74
- Jan 21 2006 | 8:56 amHi Andrew,I had to modify something in your patch to get it work here (latest maxmspjitter for windows) : the green background quad was drawn in front (Z = 0.) and masking everything else, so I had to set it to a lower Z position (-0.01 is ok).(Below modified patch)That gives me the opportunity to say you: Thanks very much Andrew for all your patches, please continue sharing as you do, it's very helpful!Maybe it would be a good idea to post your patches also somewhere on the web ; I mean it would be easier to access them : searching in the huge max mail archive for all messages posted by andrewb@cycling74.com is not so fun (I did it recently to check if I didn't missed some of your patches, and I realised that I missed a lot of them!). Doing it would also allow you to add your patches to www.maxobjects.com (there is a "patch" category, almost empty for the moment...)BestMathieu Chamagne www.maxobjects.com
