Hello everyone!

/introduction
I'm a complete PD newbie (tried it long time ago, but moved to SuperCollider, ChucK, etc, but made my mind about giving PD my attention), but must say I'm fascinated by it!
I'm getting my feet wet with PD, trying out the examples and reading the online docs, but now I've tried to make something really simple on my own and stumbled on the first obstacle.

/question
I wanted to create a switch between two audio loops, for which I could control the frequency rate. Say 1Hz would switch between 1 second of loop A, then 1 second of B.

I could manage to create the audio playing part of the patch without problem, but I'm stumped by how to implement the switch...

What strategy would you use? Something along the lines of an osc~ connected to an expr~?

Many thanks!

[phasor~]
|
[expr~ $v1>0.5]

will output a signal of zero for the first half of the wave, and 1 for the 2nd half.

[*~ ]

will multiply your signal by whatever it is fed. This acts as a switch if one inlet receives 0 or 1.

[*~ -1]
|
[+~ 1]

will invert your signal so that 0 goes to 1 and 1 goes to 0. Use that for loop B

Many thanks!

Works like a charm!

http://www.pdpatchrepo.info/hurleur/Screenshot_-_071211_-_20:44:28.png

you can attach the actual patch. that's better - so other people can use it.

also, if you want a bit smoother crossfade between the two signals, then you can smooth it by throwing a lowpass filter after the [expr~]

like,

[expr~ $v1>0.5]
|
[lop~ 50]

you can just use trial and error to see what value is best for that, or use a slider or whatever to make it variable

Cool. Thanks for the tips, mod.
And attached is the patch.

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