DigiTech RDS 2001 Digital Delay / Sampler - Rack Mount

Front Knobs/switches - left to right:
Power
Speed
Width
Delay Time
Flange
Chorus
Double
Echo
Repeat/Hold
trigger
delay sample mode
Invert Feedback
Feedback
Output Mix
Output Level
Input Level
Headroom LEDs
Effect button

Rear Knobs/connectors - left to right:
Input sensitivity
Input
Dry Out
Mix Out
Phase Out
Record Cancel
Delay Kill
Bypass
Repeat Hold
VCO Control
Trigger Foot Switch