The Midi specification allows 16 channels, each playing a different instrument. Each time you select a stop in Box Of Stops, it will assign that instrument to the next available channel, and start sending it notes.
Clearly for this to work the keyboard or synthesizer must be able to play more than one instrument at a time - it must be 'multi-timbral'. Most modern keyboards are - even if it's not obvious from the controls. In fact the specifications for [https://www.midi.org/specifications/item/general-midi General Midi] expect a keyboard to be multi-timbral. Please see [//boxofstops.com/howitworks-action this page] on the main website for a bit more detail on this topic.
== Adding a stop ==
To add a stop, first tap the spanner [[File:Wrench.png|middle]] icon to start [[Configuration mode]], then the plus [[File:Plus.png|middle]] icon at the bottom of the [[Bank]] this stop is being added to - e.g. the Great.
This will then prompt you set up the stop, which has the properties listed below.
== Changing a stop ==
To edit a stop, first tap the spanner [[File:Wrench.png|middle]] icon to start [[Configuration mode]], then the pencil [[File:Pencil.png|middle]] icon next to the name of the stop.
Note that while you are editing the stop, this has live feedback. If the stop is active, and you change the instrument, volume or transposition, the next note you play will be using the new settings. Clicking OK will keep those settings, clicking Cancel will put the stop back to how it was.