[LAU] On the fly bass downmixing to mono (mpd or alsa)?

[Ralf Mardorf]

On Mon, 2014-02-10 at 19:11 +0700, Shani Hadiyanto Pribadi wrote:
> (you can ignore the part about low pass).

On Sun, 2014-02-09 at 21:27 +0000, Fons Adriaensen wrote:
> Note that it is normally more important to remove the bass signal for
> the main speakers than to remove the mid/high part for the sub.

I have never listened to a subwoofer system that did satisfy my taste
for natural sound. At least not when I was aware about a subwoofer,
perhaps some systems were very good and I didn't notice the subwoofer. 
I suspect that the subwoofer anyway only will transmit low frequencies,
but as Fons pointed out, I suspect that many systems I heard were that
bad, perhaps because they missed to filter out the bass for the mid/hi
speakers correctly.

JFTR when mixing everything to mono, IOW also for the mid/hi speakers,
than the OP might not miss the HiHat that is more to one side than to
the other, but it could happen that some effects, vocals and other
signals will be completely eliminated, especially if the OP does listen
to simple popular music, usually made by DJs. Some of those "engineers"
use out of phase effects to spread the stereo impression.