Pedals: test controls, inputs, outputs and functions

Turn every control through most of its range rather than testing only the sound you normally use.

Also verify:

• all inputs and outputs;
• secondary switches;
• tap tempo;
• stereo, send/return or loop functions where present;
• expression and external control;
• alternative modes.

A small amount of noise while turning a pot can have several causes, while a control that completely drops the signal or jumps values deserves more attention.

Compare the available functions with the model documentation so you can tell whether something is missing or you are simply using a different mode.