Using Rodgers 505 with MIDI

[Guest]

I am trying to help a small church hook-up their Rodgers 505 to a sequencer for play-back of hymns when their organist is not available. Is it necessary to define an input channel on MIDI in order to do this? According to the documentation on the 505, Great receives on channel 12, Swell channel 13, and Pedal channel 14. They don't care about registration or volume as those can be controlled by someone seated at the organ. I cannot get the sequencer (Synthia) to work, assuming it to be providing input for all 16 channels, but then maybe I'm missing some important modification.

HELP if you can.

Thanks

Dave Kopp