Hi John,

I made an object to do just that. zeroxpos~ Have a look at the help file - it finds the 1st, 2nd or 3rd etc zero crossing within a block of audio. It's quite tricky to remove discontinuities though, and even when you start a chunk on a zero-crossing point it does not guarantee there won't be a click. Often there is anyway (because the signal goes from no activity to lots instantaneously).

A a very short <5ms fade as Tim suggests might be better - but try it anyway.

Best, Ed

--- On Tue, 4/8/09, john canning johnnyboy7777@hotmail.co.uk wrote:

From: john canning johnnyboy7777@hotmail.co.uk Subject: [PD] Finding zero crossing To: "Pure Data" pd-list@iem.at Date: Tuesday, 4 August, 2009, 4:29 PM

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Hi Folks,

I have built a loop cutter that lets you rearrange a loop using radio buttons. The main playback object is a phasor~. Each radio button sends a number corresponding to a specific 16th to the phasor~ which then jumps to the correct part of the loop. The main trouble I'm having is audio discontinuities as I have no way of shifting the cuts to land on zero crossings. Has anyone any idea how to fix this, either automatically or manually?

Cheers, John

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