New Post: Obtaining Audio Device GUIDs

Thanks Mark. I appreciate the reply.

I looked at those MSDN API pages (pretty gorpy explanations) but thanks for the link.

What I need to do is to determine which audio devices are "Speakers". Because the MMDeviceCollection includes both speakers and microphones. The device FriendlyName prefixes with the word "Speakers" but I assume that is dependent on the uses language -- it might say "Altavoz" in Spain instead of "Speakers".

I wonder if the 4-Tuple indicate speakers? In my computer devices, speakers have this tuple {0.0.0.00000000} and Microphones and the Mixer have {0.0.1.00000000}

I couldn't find any description of that 4-Tuple in the MSDN documentation.

MMDeviceCollection for my computer

Name=Speakers (Realtek High Definition Audio) DevId={0.0.0.00000000}.{73d4795c-5a20-4a6d-80ef-6b86e31ea1f1}; 

Name=Speakers (2- C-Media USB Audio Device   ) DevId={0.0.0.00000000}.{e2e6b090-3cc4-49d2-a2fb-a5d345c68f1e}; 

Name=Microphone (2- C-Media USB Audio Device   ) DevId={0.0.1.00000000}.{0fcb87d4-1a64-4afa-ace9-9444e61b3baf}; 

Name=Microphone (Realtek High Definition Audio) DevId={0.0.1.00000000}.{43b789c5-e9e7-4912-8a23-79e28f66966e}; 

Name=Stereo Mix (Realtek High Definition Audio) DevId={0.0.1.00000000}.{6864ba9c-b9a7-45cd-80d8-ee334575590c};