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BASTL Instruments
Trinity POLY Synth

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Item: N13-2761

Availability: In stock

Trinity POLY Synth
Trinity POLY Synth Trinity POLY Synth Trinity POLY Synth

Bastl Trinity POLY Synth

The Trinity Poly Synth by Bastl Instruments is a polyphonic synth optimized for use with other modules in the Bastl Trinity series. The Poly boasts three voice polyphony, subtractive and FM synthesis modes, four wavetables, an LFO, ADSR, and a multitimbral MIDI mode (requires the MIDI Bastl). Sounds from the module can be shared and stored via SysEx.

Trinity POLY Synth Features

  • Subtractive or FM synthesis mode
  • 3 voice polyphony
  • 6 different sound for each preset
  • 6 presets
  • In subtractive mode: oscillator + state variable filter with cutoff and resonance ( LP,HP,BP,notch )
  • In FM mode: oscillator + modulation oscillator with selectable wavetables
  • LFO with adjustable rate, resolution, amount, destination on different parameters and 8 different shapes
  • ADSR with impact on volume and adjustable impact to other parameters
  • Precise setting of oscillator, LFO and ADSR features are accessed by adjusting character knob which goes thru all possible settings of routing and wavetables
  • Exchange sounds between more Poly Synths by SysEx message
  • 4 wavetables (sine, saw, distorted square, noise)
  • 3 note playback by MIDI – velocity sensitive
  • Multi-timbral MIDI mode (lowest octave)
  • MIDI native by side connectors, note & velocity sensitive, CC support, thru
  • MIDI connector by connecting MIDI Bastl by the side


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  • Open-source, DIY, handmade, hackable, repairable
  • Bastl library with all source codes – gitHub
  • Atmega 328 chip reprogrammable by Arduino IDE (Arduino Uno compatible bootloader)
  • Runs Mozzi library in HI-FI mode
  • Midi implementation chart (you are able to add comments)

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