Atte André Jensen wrote:

Hi

I'm trying to do a simple resampling (downsampling) of an audio signal. I thought a simple snapshot, triggered by a metro 1 would do, but apparently not. Attached is a patch that does this, but the resampled signal sounds nothing like a rising (20hz-15kh<) sine.

Am I totally off track here, or how do I resample an audio signal to, say, 4410 khz?

NB: I'm still quite new to pd, so any comments on the patch, with regards to how to do certain things easier/better/cleaner is highly appreciated.

i haven't looked at your patch but in text view, but here are some remarks:

• [metro 0.1] won't work at all; currently [metro] has a well known

"bug" that prohibits it from emitting bangs at an interval lower than 1ms. workarounds have been posted on this list using [delay]

• [snapshot~] will quantize the triggers to signal-block boundaries

(1.45ms). you have to use [vsnapshot~] for this (afaik, there is no helppatch for [vsnapshot~]; i assume it works the same as [snapshot~] but is sample accurate)

• you could also use Pd's builtin resampling (using [block~ 64 1 0.125]

or whatever)

fgmad IOhannes