== Midi channels ==
As mentioned on the [[Stop#How it works|stops]] page, each active stop is allocated a Midi channel, and the Midi specification has a 'baked in' limit of 16 channels. Unless you have multiple output devices, the typical maximum number of stops you can pull out is actually 15, because channel 10 is reserved for percussion.
However, using couplers is quite 'economical' with the 16 channel limit in Midi. For example if the Great is already playing, and you connect the Pedals to it, any notes played on the Pedals use the same channels that were already allocated to the Great.
Similarly with a superoctave, or suboctave coupler, no new channels are needed to play the extra notes. Both of these are great techniques for building up the organ sound.