Steve, I noticed the source of my problem was setting AUDIO_UNITY on the ASL side in Analog_Bridge.ini. Unity sounds better but the amplitude is probably 40% of what it needs to be. Is there any way to bump up that level? If I set AUDIO_USE_AGC I get the right drive level but the audio quality is a little less smooth. I also experimented with AUDIO_USE_GAIN and that is about the same as with AGC interms of audio fidelity.
Question 2: What other AMBE interfaces can work with Analog_Bridge besides the ThumbDV from NW Digital? I wonder if there is a better transcoder out there.