Jeannie 8-voice polyphonic open source synthesizer with 24dB Ladder Filter and 12dB State Variable Multimode Filter

Jeannie is an 8-voice polyphonic open source synthesizer kit with digital sound synthesis and digital filters based on a fast ARM Cortex-M7 processor with 1MByte Ram. For sound generation, the user has a variety of classic and band-limited waveforms at his disposal. A pool of 15 waveform banks with 63 different waveforms each offer plenty of space for sound experiments. A waveshaper with different characteristics provides for gentle to vicious sounding distortions. To tame the waveforms, there is a digital 12dB multimode filter with fade function from low-pass to highpass and a band-pass function. In addition, there is a 24dB LP ladder filter. A 24Bit DSP effect module with adjustable parameters rounds off the sound synthesis. An integrated polyphonic 16-step sequencer provides for the playfulness of the small synthesizer. A total of 2048 sound patchesfrom 15 banks can be loaded and stored via an integrated SD card. A color 1.8 inch TFT display allows a clear menu structure and easy operation of the synthesizer. The parameters are entered via four rotary knobs below the display and an encoder for selecting the sound programmes and switching to the menu functions. In addition, there are six buttons for operating special synthesizer functions.

Specifications

 • DIY 8-voice polyphonic synthesizer
 • ARM Cortex-M7 processor 720MHz with 1MByte Ram
 • two digital oscillators per voice
 • 15 waveform banks with a total of 945 waveforms
 • 12 standard waveforms, some of which are band-limited
 * Some Mutable instruments Shruthi and Braids synthesis
   Wavetable, Vowel, SuperSaw, Csaw, Vosim and many more...
 • Noise generator (white and pink noise)
 • Oscillator Modulation (XOR, XMOD, MOD, AND, PHA, FM)
 • Waveshaper with different curve shapes
 • 3 LFOs with 64 waveforms for pitch, filter, AMP and effect modulation
 • 2 PWM LFO from 0.04Hz - 25Hz
 • Digital filters
   12dB State Variable Filter with Resonance LP/HP/BP per voice
   24dB low pass ladder filter with resonance, gain and saturation per voice
   global 12dB high-pass filter 20Hz – 2000Hz with resonance at the sum output
 • 2 ADSR generators 0.3ms – 12s with linear and exponential curves
 • 24Bit DSP effect module with 15 effects and adjustable parameters
 • Polyphonic sequencer with 16 steps
 • SD cards for loading and saving a maximum of 2048 sound programs
 • USB SYSEX protocol for the transmission of sound programs
 • Colored 1.8 inch display with a resolution of 160x128 pixels
 • Volume control
 • Bass boost function
 • 4 potentiometers for parameter input
 • Encoder for menu control and sound selection
 • 6 function keys
 • Midi In and Midi Out / Midi True
 • Stereo audio output jack 6.3mm
 • USB 2.0 midi interface
 • Simple firmware update via USB

https://www.tubeohm.com/

Pictures