I have just finished upgrading this program to FB3.3 standard and adding the ability to set the sound source. It is PPC only. You can download the complete source to this program from : http://www.appleonline.net/phil.yates/downloads/SoundTest.sit.hqx If anyone wants to post the source on an FB support site (futurebasic.org, etc.) please feel free to do so. With this code, you can record and play back an AIFF file while your program is doing something else. The overhead in processing time is very small - on a G3 and G4, you can't really tell the difference. I would like to know who's downloaded the code. This program is therefore eMail-ware. Just drop me (NOT the list) an eMail to say how you find it. Regards, Phil.