Hi Bill,
Microsoft says error 87 is Invalid Parameter. If your card supports SPDIF, turn it off in the Control Panel and see if this makes a difference. My on-board SoundMAX works fine.
73 Alex VE3NEA
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Alex,
Downloaded and installed Rocky 1.03 over Rocky 1.02.
Get the following error message:
Unable to Start Output to SoundMax Digital Audio: error 87
Attached is the file from your WDM utitlity.
Bill, WB5TCO