[LAU] Fluidsynth shift an octave down

[Pedro Lopez-Cabanillas]

On Thursday 06 January 2011, Ken Restivo wrote:
> Is there a way in fluidsynth to shift a whole soundfont up or down an octave?
> 
> Or would I have to edit the soundfont in Swami and permanently move the notes around?

You can use FluidSynth's MIDI router. For instance, type the following commands in FS' shell:

router_clear
router_begin note
router_chan 0 8 1 0
router_par1 12 127 1 -12
router_end

It transposes notes in channels 1 to 9 one octave down. See also: http://sourceforge.net/apps/trac/fluidsynth/wiki/UserManual#MIDIROUTER

Regards,
Pedro