> | I have a stereo wav 44 kHz and would like to make a high-quality
> | mono. No matter which options I use, the output mp3 seems to
> | miss high frequencies. Even if the encoding quality is high,
> | and bitrate is high, the sound quality is low (with mode=mono).
> | Is there some forced low-pass filtering?
> 
> lame --abr 100 -q 0 --nspsytune -m -a -k stereofile.wav monofile.mp3

I tried everything except --nspsytune
what is this option? it is not documented.


Thanks,
M.

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