#Synthesizers
Those numbers come from the Instrument Table for the synth used to prepare
the original file – in this case the MT32 I believe? As the MT32 is
multi-timbral you have access to 128 instruments on each of the 16
channels. #121 on the MT-32 is Castanets. On the General Midi spec it is
Guitar GretNoise whatever that is. Your problem will be that neither the
MT-32 or the Korg use the GS standard. One thing to bear in mind is that
the MT-32 uses Channel 10 for its Drum Sets. The actual sound, eg, Bass
Drum, Snare or whatever is determined by the Midi note number played, so,
for instance note C3 will always play the Hi Tom. If your Korg uses a
different drum channel or note specs then you really have a problem! If you
would like the full MT-32 Instrument Table, let me know and I will EMail it
to you – a message on here will be a bit overlong. Just as a comparison,
Instrument 40 on the MT-32 is Funny Vox – on the GS Standard it's a Synth
Bass. You can get some quite horrendous sounds. To put these right you need
the Instrument Tables for both instruments and you need to know what
Instrument number the tracks on your Midifile are playing, unless you can
recognise the sound.
– via Whap!