Erica Synths Bullfrog XL; monophonic desktop synthesizer; fully analog design; designed for creative learning of subtractive sound synthesis; VCO with Tune control, FM input, Sine and Pulse waveform and Shape/PWM control with CV input; 3-channel Mixer for Sine, Pulse and White Noise; lowpass 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 segment times, Gate input, unipolar and bipolar output; Sample & 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; 2 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 (3.5mm jack); Line output (6.3mm jack); Stereo headphone output (3.5mm jack); MIDI In (5-pin DIN) and USB-C; integrated speakers; functions can be expanded using plug-in voice cards (Sequencer, Sampler/Looper, Acid Bassline, Hipass filter, LFO and Electric Organ included); incl. side panels, external power supply (12V DC), manual, 12x 1/4" patch cables, 3x DIY Voice Card; Dimensions (W x H x D): 820 x 505 x 65mm (250mm with side panels); Weight: 8.3kg