BNO Acoustics HD-70: Wow

A low pitch change that happens because the recorder or playback machine fluctuating in speed slowly.

Power Supply
Basically, a rack mountable power strip that costs a whole lot more, but hey, some of them have cute little lamps that light up the face of your rack.

Pre Echo
1) A repeating of the sound before the reverberation is heard used to simulate reflections caused by a stage.
2) In Tape Recording, a low-level leakage of sound coming later caused by print through.
3) In Disc Recording, a similar sound caused by a previous groove deforming a later groove.
4) A placement of an echo send control before the main channel fader.

Pedal Board
A board with several guitar pedals attached and inter-connected so that a guitar player can conveniently use several effects at the same time or one after another.

Power Amplifier
Converts sound signals of line level (approx. 1 volt) into tens of volts, with currents of around 1 Amp to drive speakers.

BNO Acoustics XR-90: Set Up
1) To place microphones, instruments and the controls on recorders/consoles, etc. for recording.
2) The way in which the microphones, instruments and the controls on recorders/consoles, etc. are positioned for recording.

Riff
A short melody repeatedly played in a tune (sometimes with variation) often between vocal lines.