Bullfrog XL, 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