Forums > MaxMSP

Groove causes audio dropout when slowly ramping from off to on

Dec 09 2012 | 6:56 pm

Hi guys,

I’m having some problems with groove. Mainly being I’m getting audio dropouts when using a [line~] to ramp the speed up to 1. from 0. or vice a versa over 5000ms.
I’ve checked this with both resampling on and off (not that it should make a difference).
I have also tried putting a dcblocking stage after groove incase slowing down that much creates some DC.

I’ve included a cycle at 220hz in the patch to illustrate the dropout.

The patch is here:

-- Pasted Max Patch, click to expand. --

Dec 09 2012 | 8:30 pm

For me, the problem goes away when I get rid of the resample attribute. It’s worth noting that the interruption of the audio chain happens whether the groove~ is hooked up to the dac or not.

Dec 09 2012 | 10:06 pm

Yes, I worked out that If I get rid of resample and use an ADSR to smooth the output of groove I can get rid of the troublesome clicks!

Is this a bug in the resampling function of groove or am I abusing it?

I’m just a sucker for those aliasing effects you get when slowing down a resampled groove, shame I can’t harness them with this kind of patch.

Dec 10 2012 | 11:12 pm

I think it’s probably a groove~ resampling bug. Maybe a denormal issue? I submitted it to Cycling.

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Forums > MaxMSP