Yes, I discovered this several weeks ago (and send a notice to the
list), when the latest windows VM was released:
	on NT 4 the sound player is apparently not closed properly, as once
you have played a sound you will get this error-message for each sound you
want to play later.
	This may also apply to sounds played when putting things in the
garbage bin, or page-turning in bookmorphs.
	But, as I was able to continue working (closing the error box), I
thought I could live with it and wait patiently till the next VM, ;-)

	Hans
>  
> Running Squeak 3.0 and 3.1 alpha (with GREAT delight) on Windows NT 4.0. 
> After a while audio playback breaks -- just by triggering flap open-close 
> sounds, etc. -- and I get "The specified device is already in use. Wait 
> until it is free, and then try again." error message in the pop-up 
> emergency pane at the bottom of the Squeak screen. At this point Windows 
> Apps can no longer play audio (i.e. Media Player does not produce audio 
> even though it appears to play and no error message is generated in 
> Windows). It seems to me that Squeak does not always properly close the 
> audio playback driver. The only option I have at this point is to reboot. 
> This happens very consistently, within 5-10 minutes of entering the image,
> 
> though I have not been able to replicate a repeatable scenario for it to
> occur.
> 
> Has anyone else encountered this?
> 
> Danny Oppenheim
> 
> 
> ---
> 
> Dr. Daniel V. 
> Oppenheim 
> 
> 	Computer Music Center
> 	IBM T.J. Watson Research Center	     phone: (914) 945-1989
> 	P. O. Box 218 (or Route 134)	     fax:   (914) 945-3434
> 	Yorktown Heights, NY 10598	     www.research.ibm.com/music
>