Hi all,

I have a really simple project that I asked some people about and they recommended PD. I was looking for something open source and helpful for any future projects.

I'm looking to take the incoming audio to my computer, delay it by 20 minutes, and send it back out.

I've tried to follow some of the PD examples but I've been unable to find anything that gives me a quick feel for audio in and audio out. I'm willing to do some homework, but if there's a less comprehensive tutorial out there I'd love to know about it.

What you could do is

• use [delwrite~] to setup a delayline
• and [delread~] or [vd~] read the delayline

but for 20 minutes that needs to be a huge delayline and it will consume lots of useless memory. So maybe better is to :

• record the sound in a table with [tabwrite~]
• setup a [metro] and to trigger a bang each 20 minutes
• with that trigger drive a [tabread~] or [tabplay~] to playback the recorded sound

@domien - a table will use the same amount of memory as a delay line...

a 20min delay line in Pd will need about 212MB to store the audio data, double that for stereo. You'll want to use [delread~] instead of [vd~] due to floating point accuracy issues that you run into with such large integers.

the patch is just (for one channel):

[adc~]
|
[delwrite~ $0-left 1200000]

[delread~ $0-left 1200000]
|
[dac~]

Claudius, i was thinking about recording lets say 30 seconds of audio and playing that back 20 minutes later. Then a table approach is much more efficient. Of course if you want continuous recording/delaying and playing then the memory used is the same.