I am trying to encode stereo WAVs (from EAC) to mono with MPPenc 1.14 on WinNT. I tried the following command lines:
"--standard --xlevel --dmxchan 1" or
"--standard --xlevel --dmx -1"

Both times I get an error telling me that '--dmxchan' and '--dmx' are unknown options. Those switches are included in the long help though.

Is my command line wrong? Is mono not supported in this version of MPPenc? Do I need to go back a version or two?

try "-dmxchan 1" instead, with only one dash in front of the switch

Thanks kdo, that appeared to fix it.
The weird thing is though that I can't see where the APE tag identifies the MPC as mono. And when I'm playing the MPC in Winamp 2, Winamp says it's stereo. A quick listen and it sounds like mono to me though.

** but, the bitrate is still hovering around 160 kbps as if it's a stereo recording, shouldn't the bitrate be more like ~80 kbps? **

hmm... i'm afraid you're right. it doesn't fix it... (the switch just gets ignored)

that puzzles me now. i remember some time ago I messed with this down-mixing and there were problems with those swithces. But I can't recall how I did it...

sorry, can't really help... Maybe later, if I remember anything.



Edit: found those old files i was playing with. Looks like I had to make a mono wav first.

Probably the dmx switches are broken / not implemented.

Thanks for the followup kdo. Not a huge deal anyway. Just wanted to know for my own reference.