The Catalinbread Belle Epoch Deluxe Tape Echo Delay Pedal features an exact EP-3 circuitry, from the 22-volt power rail, to the JFET preamp (later spec), to the mixer stage, to the high gain silicon transistor-based record and playback amplifiers, to the feedback loop. All circuitry is faithfully reproduced and fine-tuned from the original EP-3 specifications. The only thing missing is the record and playback heads, with a 24-bit high-fidelity digital delay line taking the place of the tape.
Depth
It controls the modulation depth. The type of modulation depends on the setting of the Echo program.
Record Level
It controls the gain of the input signal hitting the record amplifier. Range from no signal all the way to heavily overdriving the transistor record amplifier.
Echo Volume
It controls wet/dry mix using the identical mixer circuit as the EP-3 for the same subtle phase and tone shifts phase and tone shift of the dry signal.
Echo Sustain
It controls the amount of delay feedback and is tuned to function just like the EP-3. Run-away echo starts around noon.
Echo Delay
It controls delay time from 80ms to 800ms exactly like an EP-3.
