What is Sustain, and what is Reverb
Sustain - is the length of time a note continues to sound (and gradually fade out) when the key producing the sound is released.
Reverb - is an echo-like effect added to the sound giving the impression of a performance in a large room or concert hall.
On our organs and keyboards we can set the 'reverb' to create this 'echo' electronically .. although the reverb on the Farfisa Balmoral organ I had was created by the sound 'reverberating' down a lengthy coiled spring (ie. it was mechanical).
Listen to how Don Wherly (DonW) has used the REVERB on his AR100 organ to make the Saxophone really stand out in this piece. It's after the trumpet he has at the beginning of the piece.
Is It True What They Say About Dixie
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https://app.box.com/s/rtaawmlagmtu9ydvnnnlhvxnwik8xbv7
Very effective!
Hugh