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Synthgirl Mini

MicroDigitalPolyphonic

Randomwaves built Synthgirl Mini as a pocket-sized wavetable synthesizer that doesn't compromise on sonic depth, packing a 550MHz ARM Cortex M7 processor and 24-bit audio into a genuinely portable format that fits the "mini" designation without feeling like a toy.

The heart of Synthgirl Mini is its dual wavetable oscillator engine, each capable of loading custom wavetables up to 256 steps from tools like Serum, letting you import your own sonic textures or explore the included library. Four shaping LFOs with 25 prebuilt modulation types give you serious movement and character, while the multimode dual filter handles lowpass, highpass, bandpass, and band stop modes with full parameter control. The 5-inch color LCD display with capacitive touch controls makes navigation intuitive, and you get a built-in parametric EQ plus two effect channels with eight algorithms including delay, chorus, flanger, phaser, compressor, expander, overdrive, distortion, and bit crusher, rounded out by an independent reverb engine. An arpeggiator with adjustable rate, pattern, chord, order, and octave settings adds quick melodic possibilities, while the sequencer handles pattern creation with quantization down to 1/64 note resolution.

Connectivity includes USB-C for power and data, MIDI in and out, sync in and out for hardware synchronization, an SD card slot for loading samples and saving your work, and an STM32 interface that invites firmware hacking and customization. The open-source architecture means the community actively contributes improvements and custom features, making Synthgirl Mini feel like it grows with your needs rather than staying locked in place.

Released

2024

Status

In Production

Synthesizer
Format
Micro
Type
Wavetable, Digital
Internal Battery
No
Voice
A/D
Digital
Polyphony
Polyphonic
Oscillators
2
Oscillator Type
Wavetable
Filter
Multimode
Envelopes
-
LFO
4
Effects
Delay, Chorus, Flanger, Phaser, Compressor, Expander, Overdrive, Distortion, Bit Crusher, Reverb
Expression
Aftertouch
No
Velocity
No
MPE
No
Additional
5-inch color LCD display, Capacitive touch controls, 24-bit audio, 550MHz ARM Cortex M7 processor, 2 wavetable oscillators with up to 256 steps and .wav sample support, 4 shaping LFOs with 25 prebuilt types, Arpeggiator with adjustable rate, pattern, chord, order, and octave settings
Software
-
I/O
Audio In
-
Audio Out
-
Headphone
1x 3.5mm
MIDI
In, Out
MIDI Type
DIN (5-pin)
Ports
USB-C, SD Card, Clock In, Clock Out
Wi-Fi
No
Workflow
Arpeggiator
Yes
Sequencer
Yes
Mod Matrix
No
Memory
No
Measurements
Dimensions
-
Weight
-
Last updated Mar 8, 2026