Erica Synths Bullfrog XL

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Monophonic Desktop Synthesiser

Fully analogue design
Designed for creative learning of subtractive sound synthesis
VCO with tuning control, FM input, sine and pulse waveform and shape/PWM control with CV input
Three channel mixer for sine, pulse and noise
Low-pass filter (-24dB/oct.) with controls for cutoff, resonance and CV input with attenuator
VCA with offset control and CV input with attenuator
Delay with setting options for delay time, feedback and wet/dry mix
Two attack/release envelopes with switchable loop mode, CV inputs for both time parameters, gate input, unipolar and bipolar output
Sample and hold stage with rate control, pulse output, gate button, selectable clock source (free/gate) and noise output
Clock divider with 4 outputs (2/4/8/16)
Attenuator with level control
Slew processor with adjustable slew time
Two splitter circuits
Two-channel oscilloscope with screen and trigger input as well as one input per channel
Master section with volume control, CV/gate inputs and trigger/gate outputs (3.5 mm jack)
Line output: 6.3 mm jack
Stereo headphone output: 3.5 mm jack
MIDI input (5-pin DIN) and USB-C
Built-in speakers
Functions can be expanded using plug-in voice cards (sequencer, sampler/looper, acid bassline, hipass filter, LFO and electric organ included)
Includes side panels, external power supply (12 V DC), operating instructions, 12x 1/4’ patch cables, 3 x DIY voice cards
Dimensions (W × H × D): 920 × 560 × 200 mm
Weight: 8.3 kg