• ### Measuring change

I thought this would be easy, and perhaps it is, and perhaps there is an object which already does this.

What I want to do is to create which measures change in a signal. The greater the change is in monitoring the greater the signal it outputs, BUT, in a gradual way. So if the pitch of a signal is changing like mad, it outputs say 10. But if the signal has changed very little it outputs 1. However it would not just jump from 10-1 suddenly either.

I think I need a hint from a kind soul on how to approach this. If I do magically think of something I'll post it up

Thanks for any help!

• Posts 4 | Views 2897
• sounds like deriving to me. Try this out...

http://www.pdpatchrepo.info/hurleur/signalchange.pd

any technology distinguishable from magic

• It looks great but I'm not sure what the delta is really doing? I have read the help file and read about differential equations on Wikipedia, but still am not sure.

Is there anyone, who can in layman (someone who stopped studying maths at 16) terms give me a clear idea of what it's doing?

Thanks so much!

• the delta object simply holds on to the last value entered, and when a new value comes in, subtracts the old value from the new value and outputs the difference- therefore differential. It holds the new value to be the next old value.

any technology distinguishable from magic