The IDT audio control panel appears in Settings / Control Panel on the XP Pro computer. It starts working OK. Then it fails without an error message or other notice - - except there is no sound from the stereo speakers, and the speaker on the mother board 'beeps' instead. Selecting the IDT audio control panel results in this series of error messages:
An execution error occurred while trying to run C:\Windows\System32\Shell32.dll,Control_RunDLL "C:\Windows\System32\idtsg.cpi" IDT Control Panel"
The instruction at "0x1005eee06" referenced memory at "0x00fc3780". The memory could not be "read". Click on OK to terminate the program.
The instruction at "0x100642e6" referenced memory at "0x00fc4708". The memory could not be "read". Click on OK to terminate the program.