Hi , I'm working on a project that requires a low value DC ( adjustable ) to be used as a comparison to a low external voltage. I couldn't see any Blocking Caps on the schematic of the audio card to the "Line out" jack but filling a buffer with constant values using portaudio library in C doesn't give me anything. Is the card capable of DC output? I am using the external scripts that come with the card to set the output to Lineout first and I can play a standard WAV file without any issues.
