What are the send and return parameters used for in-depth.
Send and return is a way to add a partial fx to a channels signal.
The 2 ways of adding effects are insert and send & turn.
Insert is used for linear time effects like compressors, eg, distortion, etc. Where the FX is inserted on the channel and applied on top of the whole sound.
Send and return is used for non linear or time variant effects. E.g. Reverb, delay where only a part of the channels signal is sent through the channel send to the return channel where fx are applied and mixed back to the master.
Send and return also enables you to send varying abouts from a number of chanels to the same effect.