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8 channel sfplay~ and sfrecord~ Maxmsp freezes (bug?)

Apr 22 2011 | 10:10 pm


I am encountering a crash while using sfplay~ to play an 8-channel file and recording its output at the same time with sfrecord~. I’ve made a little patch to demonstrate it. It could have something to do with long sound-files (e.g. around 2 mins) and/or 96k sampling rate.

Here is what I do:

1- load an 8 channel sound-file
2- open a file to record to
3- enable sfrecord~
4- start playback

sometimes it’s OK at other times the [playbar] object gets stuck and finally max will freeze and I have to force quit. Please contact me if you need any of my sound files but as far as I can tell there is nothing wrong with the files.

I’m also attaching my crash report.

Any help will be appreciated.

Also if it’s helpful here is the error I get in the console (this second error appears when the play-bar gets stuck).

22/04/2011 23:02:13 [0x0-0x1f21f2].com.cycling74.MaxMSP[3098] Fri Apr 22 23:02:13 Peiman-Khosravis-iMac.local MaxMSP[3098] : kCGErrorIllegalArgument: CGSGetWindowTags: Invalid window 0x86d

22/04/2011 23:04:37 quicklookd[3140] [QL] ‘Creating thumbnail – cancelled’ timed out for " (Start date: 2011-04-22 23:04:30 +0100)



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

May 12 2011 | 6:29 pm

Sorry but I’m going to give a little nudge here.

This is a bug report and any reply from cycling74 would be much appreciated. If I am mistaken then please feel free to tell me!

This is still happening and I cannot find a workaround. I have increased the buffer size but not much change.


May 14 2011 | 3:37 pm

Keeps happening. There is a problem when reading and writing 8 channel files from/to disk at the same time.

May 14 2011 | 4:04 pm

For support from Cycling’74, it’s best to contact them by mailing to

May 14 2011 | 7:04 pm

Thanks I will!



May 22 2011 | 1:06 pm

So I get no replies even after writing to

This is ridiculous. Is there no support? Is there no one to respond to bug reports?

May 22 2011 | 2:43 pm

Have you tried doing the same thing *without* using playbar (which appears to be designed for qt movies back in the day)?

May 22 2011 | 6:05 pm

i don´t know your specific problem, but i have at many times had sfplay play back large (longer than 10 min) 12-ch files in installations.
would it be an option trying to record to an attached external disk?
wirting/reading might be overload for the internal disk.


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Forums > MaxMSP