Yep, this is a weird one. I've had it happen with some USB headphone/
speaker sets, finally tracked it down to OS X.

Go to: applications/Utilities/ and double-click 'Audio MIDI Setup'

In 'Audio Output' change the frequency setting from where it's at, as
it has been changed (don't ask me why...). Say change it from 44100
Hz to 32000 Hz and you should have sound pop back.


I don't think this has anything to do with MIDI. In fact, there is no option
for Audio Output in  the "Audio MIDI Setup."

I checked the system with "Amadeus II," a sound editing program, and the USB headset worked fine. I could record and playback through the USB headset just fine. I then checked with a program that I had written in Director, using the Sound Xtra to record. This also worked fine. I could record through the microphone of the headset and hear the audio playback through the headset headphones.

However, as soon as I record something in Revolution, calling the "record sound" command, the headphones on the USB headset go dead. And they are dead for any audio in the computer. The only way to get audio back into the headset is to reboot the machine. I can change the audio out to the built-in speakers in the computer and that plays back just fine. I just can't
get the audio to go through the USB headset.

These headsets are Logitech Premium USB Headset 350. I may just have to go back to my Plantronics headsets with the iMic, but they have proven to be not very long lasting with regard to the microphones. I was hoping to find a more robust solution. Since this is a lab classroom, we can't have audio playing through computer speakers, and we need
to have audio working.

The problem persists on Intel iMacs, PPC iMacs and my G4 Desktop system.

I'd be grateful for any suggestions.

Thanks,
Dan

Dan Soneson
Director, Language Lab
Southern CT State University
New Haven, CT. 06515

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