I recently upgraded to the Delta-44 sound card and things are almost working as expected.
Things are fine with SDR receive functions and for normal multimedia playback on the computer (like playing MP3 audio files). But then in testing out the mic input function in prep for SDR transmit tests, I notice that I just cannot get any audio gain like I used to with the Santa Cruz card previously used. I can hardly even get 1/4 scale readings in the sound card control panel when speaking loudly into the mic. The mic is proper impedance for "mutlimedia sound cards", and indeed worked fine with the Santa Cruz card before. The gain setting is indeed "-10dB" in the control panel. (I've tried all setting combinations.) Someone had privately suggested that perhaps the D44 doesn't provide a bias voltage for the mic input, as some/most cards do ... Has anyone else experienced this condition with the D44? Thanks. 73, George N2APB
