Detail 01
Dual-channel oscilloscope with trigger input
You can observe two signals and use scope, Lissajous, or math-channel display modes directly on the instrument.
Product detailSKU #1500000474624
Erica SynthsBullfrog XL Analog Desktop Synthesizer - USA Plug
modernelectronicpop
1/3
Independent shopping perspective
The Korena take
Bullfrog XL is a fully analog desktop instrument built around subtractive synthesis, with 1/4-inch patching and an onboard dual-channel oscilloscope. The scope lets you view waveforms, envelopes, modulation, and control signals as you work, so patch changes have a visible counterpart. Its VCO, resonant low-pass filter, VCA, looping envelopes, sample-and-hold, clock divider, noise source, and other utilities provide a substantial hands-on system. Built-in speakers, DIN5 MIDI input, a main output, and an expansion slot make it ready for focused exploration at the desk.
Strong match
Who this is for
- Learning signal flow by watching audio, envelopes, and control voltages on the integrated oscilloscope.
- Desktop patching with included cables, speakers, and a complete analog subtractive voice.
- Expanding the core instrument through its voice-card slot and included voice-card collection.
What matters in use
The specifications, translated
Catalog numbers tell only part of the story. These are the details most likely to change how this product feels, sounds, or fits into a setup.
Detail 02
1/4-inch patch sockets throughout
The system is laid out for large-format patching rather than mini-jack connections.
Detail 03
USB-C
USB-C supports firmware updates and extended functionality.
Detail 04
Clock divider outputs
The divider provides /2, /4, /8, and /16 outputs.
Detail 05
12V DC power adapter included
A matching power adapter is part of the package.
Final check
Know before you order
- 01The unit uses 1/4-inch patch sockets throughout.
- 02DIN5 MIDI input is provided; USB-C is identified for firmware updates and extended functionality.
- 03Its dimensions are 32.28 x 19.88 x 2.56 inches, or 9.84 inches high with side panels.
Product questions
Before you decide
Straight answers to the questions shoppers most often ask about this product.
01Can Bullfrog XL show control-voltage signals as well as audio?
Yes. Its dual-channel oscilloscope is designed to monitor waveforms, envelopes, modulation signals, and control voltages.
02What voice cards come with Bullfrog XL?
Included cards are sequencer, sampler/looper, acid bassline, high-pass filter, LFO, and electric organ; three DIY voice cards are also included.
03Is a power adapter included?
Yes. Bullfrog XL includes a 12V DC power adapter.
Reference
Full specifications
The complete catalog record, organized around the decisions musicians make when comparing gear.
2 detailsSound
- Voice Card Slot
- Yes
- Diy Voice Cards
- 3 included
1 detailsPlayability
- Neck Shape
- C
1 detailsBody & build
- Color
- White
8 detailsConnections & power
- Gate Output
- Gate output and trigger output
- USB
- USB-C for firmware updates and extended functionality
- Inputs
- Two oscilloscope inputs with trigger input
- Gate Input
- Gate input
- Audio Outputs
- Main output
- Power Supply
- 12V DC power supply included
- Cv Input
- CV input
- MIDI Input
- DIN5 MIDI input
3 detailsSize & weight
- Weight
- 11.68
- Height with Side Panels
- 9.84 inch
- Dimensions
- 32.28 inch x 19.88 inch x 2.56 inch
1 detailsIn the box
- Included Voice Cards
- Sequencer, sampler/looper, acid bassline, highpass filter, LFO and electric organ
27 detailsOther
- Tracking
- Accurate 1V per octave tracking over more than 8 octaves
- Patch Points
- 1/4 inch patch sockets throughout system
- Display Modes
- Scope, Lissajous figures and math channel
- Slew Processor
- Slew limiter with adjustable slew time
- Filter Type
- Resonant lowpass voltage-controlled filter
- Vca
- Voltage-controlled amplifier with adjustable offset
- Divider
- Clock divider with /2, /4, /8 and /16 outputs
- Oscilloscope Type
- Built-in dual-channel oscilloscope
- Design
- Fully analog signal path
- Model
- Bullfrog XL
- Synthesis Type
- Analog subtractive synthesis
- Sample and Hold
- Sample and hold circuit with independent clock
- Attenuverter
- Bipolar attenuverter for CV and audio signals
- Manual Gate
- Manual gate button
- Oscillator
- 1 voltage-controlled oscillator
- Accessories
- Bullfrog XL synthesizer with side panels, 12V DC power adapter, user manual, 12 patch cables, voice cards and DIY voice cards
- Master Volume
- Master output level control
- Resonance
- Self-oscillation capable
- Splitter
- 2 buffered splitter circuits
- Delay
- Analog-style delay with adjustable time and feedback
- Envelope Generators
- 2 looping attack-sustain-release envelope generators
- Product Type
- Analog educational synthesizer
- Mixer
- Three-channel audio mixer with sine, pulse and noise inputs
- Envelope Modes
- Free, gated and loop modes per envelope
- Waveforms
- Sine and pulse with waveshaping and PWM
- Noise Generator
- Zener diode-based noise generator
- Math Functions
- Signal add and multiply
