ROLAND RE-800
Digital Echo (199X)

Budget reverb and delay for instrument and vocal input .

Very simple interface based on plain knobs control.

RACKMOUNT 1 standard unit height.
The main panel features a simple 7-segments display + 5 knobs for patch edit.


Back panel terminal connectors:
- 2 main inputs
- 2 signal outputs
- bypass pedalswitch input
- impedance selector switch between MIC/ INST / LINE.

 

TECH main engine based on a 8 bits CMS Mitsubishi M37470M2 / 314SP + DSP TC25SC080AU-104 (also found on the BOSS pedal). Internal sampling rate at 32 kHz, ADC is a bits LC8390M and DAC is a NEC uPD6379 (both works at 16 bits).

 

ALGORITHMS there are 9 reverb models available: just select the main mode with the rotary knobs and adjust feedback and time values. TIP: an interesting feature is to change the parameters in real-time, however tweaking knobs creates digital artefacts.

short delay long delay warm short delay (vocal echo) warm long delay delay+room 1 delay+room 2 delay+hall 1 delay+hall 2 delay+plate

INTERFACE big knobs, but segment display- quite intuitive:

- MIC1: sets the front MIC1 input gain - MIC2: sets the front MIC2 input gain - BALANCE: ajusts the volume between WET and DRY signal - DELAY TIME: determines how much of the wet signal is fed back into the effect - TIME: sets the echo time in ms.

 

 

MAINTENANCE not a single issue, pretty simple circuit, no backup battery.

LEFT RE800 motherboard - click to enlarge

 

 

AUDIO DEMO

	simple test
	pad test
	pad test 2
	feedback
	experiment tweaking pots