O.K Nick.
1. Audio input of your organ is the aux in I told you. One and the same. Here you will put the audio cables from your computer.
2.Audio output of your organ is where you can send the sound of your organ to another amplifier/speaker system (Hi-Fi/Home cinema/Active speakers/studio console ect) and to a recording equipment such as CDrecorder/DVDrecorder/multichannel recorder and so on, to record your music.
3.Midi out. With this your organ controls the "slave" in this case your computer/Hauptwerk and the related programs. "slave" can be also a synthesizer(midi in) of yours, or other midi expander/module ect (allen organs have an exelent pipe organ module)
4.Midi in. your organ becomes slave. Computer rules. But, in a combination of midi in- out of both of them(organ-computer), you can sent your playing to a sequencer in the computer and record events, and when you finnish the computer plays back the events you played using the sounds and registrations of your organ(all this without Hauptwerk, but you can do the same with it - it's a bit more tricky for you right now easier with GrandOrgue v,2)
5.Midi thru.It's what it says:thru. Example : you got a synth, an organ and a computer an you want the sythesizer to control both your organ and computer. Here's the connection : Synth(midi out) - organ(midi in) - organ(midi thru) - computer(midi/usb in). I hope you understand(thru sends data from synth to computer).
About reverb. Nick what I told you(organ without reverb is not an organ) is not mine it's a common view of almost all organists and technitians (Go to Litomysl organ project for hauptwerk and read).
Your room's acoustic can never be the physical place of a pipe organ.
I wasn't talkin about digital reverb, I know its artificial and works best with other kinds of music.
I was talkin about IMPULSE RESPONCE and convolution reverbs. Example :
Earlier this afternoon I played and recorded Buxtehude's "Nun come der Heiden Heiland, Bux211" using GrandOrgue v.2 with Rommansvillier Organ in France heard inside a REAL Midieval church in Italy, or could do it inside Yorks Minster ! Yes. The real acoustics of the specific place. I have played Frescobaldi with my 1720 Blanchet harpsicord inside the Scala di Milano !
We'll need lots of pages to discuss impulse responce, so go to OPEN IMPULSE RESPONCE FREE LIBRARY, among impulses has a page where explains in depth the convolution exisosis. I tell you it's a revolution. Now that I know how to use it, I can live without it, unless I'm in a church everyday, and as you know here the Orthodox Church rules.
Tell me more
your friend
Panos