QUOTE(halb27 @ Feb 7 2006, 08:07 PM)
In their documentation they say they use the -k switch. So that's why.
But they seem not to use it as a rule. In case I don't download lossless, I usually download @ abr 256 as I prefer high bitrate anyway. With this lowpass is there, quality is fine.
I think it's only used with CBR, and according to their help pages only from 160kbps upwards; That's what they write:
CODE
128 kBps bit rate: -q0 -m j (highest quality, joint-stereo)
160 kBps bit rate and higher: -q0 -k (highest quality, stereo, psycho-acoustic filters disabled)
If you are using presets, you can choose one of these:
alt-preset standard
alt-preset extreme
alt-preset insane
alt-preset 128-320 (abr)
So it's very advisable only to use preset-based encodings, as they apparently do not mess with the settings in this case (-k with 160 kbps? they must be kidding??)