Clicks and crazy behavious using upsampling and parallel in Poly~

Alexandre's icon

Hi,
I get clicks and crazy behaviours using upsampling 2 and @parallel 1 in Poly~

This behaviour seems to happen only when i use @parallel 1 as argument, not while switching with the attrui object...

see patch attached.

Thanks,
Alexandre

P.s: And in a more complex patch it seems i also have crazy cpu problems without upsampling, and even also without using parallel, while sending a lot of max messages inside the poly~ while without using poly~ my abstraction works super fine. I'm kind of generally having bad luck with poly~ and my complex patches...

poly-test-parallel.zip
zip
Alexandre's icon

I precise that this is not happening with max 5 but only max 6. I'm on max 6.1.6, os 10.8.5, MBPro i7 2011.

Alexandre's icon

(and i believe that there is no parallel processing happening while switching with the attrui object or with the toggle in the inspector)

EDIT: oh yes this is because we have to turn off and on DSP again... So now we have the same clicks/weird noise using attrui/inspector.

geddonn's icon

Sorry to hear your having trouble. Can't test the patch at the moment to say if it does the same on my machine but I do believe that if you turn parallel on/off you have to restart DSP for it to take effect.

Alexandre's icon

I lost 2 DAYS of work of 2 people (me and a developper i pay) because of this strange behaviour. (Trying to figure out what was wrong in our complex patch before we finally put @parallel 0) It's not just a restarting-DSP thing.

dtr's icon

I'm not getting clicks but the @parallel 1 version definitely has a buzz that's not the sine going into it.

OSX10.8.5
Max616

Roth's icon

It appears to me that the issue is with the resampling filters. The distortions are not there for me if I turn it off.

Alexandre's icon

yep, that's the resampling filters that seem to mess-up with parallel...

Matteo Marson's icon

I'm still having the same issue here on Max 8.0.8