On the MRX muting / no-signal issue:
I have done some further testing. The muting circuit does the following:
- mutes if it gets digital silence (all "0"). Does not mute if there is even a tiniest bit of data apart from zeros.
- It activates after 850 - 900 ms of digital silence.
This means that you can't have tracks with more than 850 ms of silence between them. (nor can you pause it)
1) Chop the tracks with dbPowerAmp. With the DSP "Trim silence", select both "Trim Silence From Beginning" and "Trim Silence From Ending", set threshold to 400 ms (in the worst case tracks will have 800 ms of silence in between them, safely below the measured threshold), and Silence is "Digital Silence '0's". dbPoweramp keeps all metadata, so you don't have to worry about that. This always works, but you have to re-encode lots of files, and you are also removing parts of them. Personally I don't mind, I prefer my music without long silent pauses anyway.
2) Play around with the crossfader in Foobar. I don't know how it exactly works, but it solves this problem for most of the tracks if set to 200 ms (lowest possible value). If you encounter tracks which are still problematic, you can cut just those with dbPoweramp, or increase the fade duration. (It gets noticeable around 500ms)
3) Use Direct Sound instead of WASAPI. This means obvious degradation in audio quality, but due to the way windows mixer works it solves this problem altogether.
Note: Windows Mixer will output noise even if it's fed silence. But only if it's fed something, so not when you pause playback. See the reasons in my previous post.
3/b) If you want to pause tracks and MRX to not lose signal, you can play a track with complete silence in another media player in the background. This way Windows will always get signal (silence, when you pause your main playback), and thus it will always output enough noise for the MRX. This means no WASAPI, and two media players running (+ Some time to create / get a silent file). I would only recommend this for movie playback though.
Edited by Barnahadnagy - 1/18/14 at 7:58am