MubiQ

With a little inspiration from Apparat, as an exercise i've been trying to recreate an almost granular looping effect using groove~ but the clicks at the loop points are unbearable!

can anyone help me with this? I've pasted the patch below, it may be worth loading in your own audio file to hear it:

new-to-max-trying-to-figure-out-zero-crossings-to-avoid-audio-clicks

[grooveduck] or [grooveduck2](for stereo).

Usual method in granulators is - as far as I know - to multiply each grain with a window or an ADSR kind of envelope. Surely easier than to look for 0 points. Check different granulators in Max. A great patch is the granulator coming with the Max examples (in the sampling folder).

thanks folks. grooveduck2 proved really useful. there's still faint clicks, but it's much better. This forum is great, as soon as I get to a more developed point with max, I look forward to helping others out in the same way!

I spent last wednesday developing a java object that automatically moves loop points to the nearest zero crossing. It reduces clicks but I think grooveduck gave me better at the very least similar results in the end.

You don't need to walk around your buffer~ to find zero crossings and transients - if you do it via uzi, depending on the duration of the audio you're examining, this might also hang your max for a while...

same thing for normalizing - you don't really need to do it!

- while you're recording, check for transients and silences to detect the actual beginning and end of the speech. you may use a timer object to track the start and end positions relative to the beginning of the recording. then you can use these values as the groove~'s loop boundaries.

- while you're recording, keep track of the maximum amplitude (or, why not, the max RMS power) of your audio: you will use this value (well, its [!/ 1.], actually) as the gain for your playback.

- when you play back your audio, you can send groove~ the startloop message; you can use groove~'s right outlet to stop the playback and control a trapezoid~ object to perform a very short fade-in and fade-out in order to avoid clicks!

I can't send you an example patch right now, but I hope this helps...

I definitely agree with Jean-François.
You don't need to walk around your buffer~ to find zero crossings and transients - if you do it via uzi, depending on the duration of the audio you're examining, this might also hang your max for a while...
same thing for normalizing - you don't really need to do it!
what I would do is:
- while you're recording, check for transients and silences to detect the actual beginning and end of the speech. you may use a timer object to track the start and end positions relative to the beginning of the recording. then you can use these values as the groove~'s loop boundaries.
- while you're recording, keep track of the maximum amplitude (or, why not, the max RMS power) of your audio: you will use this value (well, its [!/ 1.], actually) as the gain for your playback.
- when you play back your audio, you can send groove~ the startloop message; you can use groove~'s right outlet to stop the playback and control a trapezoid~ object to perform a very short fade-in and fade-out in order to avoid clicks!
I can't send you an example patch right now, but I hope this helps...
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sorry guys, this was meant for another thread!

sorry guys, this was meant for another thread!
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(and clearly the Jean-François reference was added at the last moment!)

(and clearly the Jean-François reference was added at the last moment!)
cheers
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new to max, trying to figure out zero crossings to avoid audio clicks