Hi list, I tried a few things with the array solution mentioned. It works but it takes a lot of the processor. I got about 10 sporks going (plain playing), but I'd like to use some of the flexibility of 'sndbuf' So I'd like to try writing to disk and using a sndbuf as well. But with the following lines of code it does not work. The sound is not properly written to disk. //sucking samples; adc => WvOut w => blackhole; // this is the output file name "/Users/hansleeuw/miniaudiclefolder/examples/data/trumpet.wav" => w.wavFilename; 1 => w.record; //start recording 2::second => now; //a soundfile of 2 seconds 0 => w.record; //stop recording w.closeFile; //to do it properly (also tried without) // Now loading the soundfile in and here the program crashes // (miniaudicle and terminal) sndbuf buf => dac; "/Users/hansleeuw/miniaudiclefolder/examples/data/trumpet.wav" => buf.read; while( true ) 1::second => now; In terminal I get the messages: ugen_xxx.cpp:1986: failed assertion `d->fd == NULL' Abort trap What can be the problem? It seems the soundfile is not written properly. Quicktime gives "incorrect duration" (-1024). I don't have a problem loading 'proper' soundfiles with sndbuf. Thanks for your time. Best, Hans.