Yarns is a MIDI interface providing up to 4 channels of CV/Gate conversion, along with some MIDI note message processing features — including arpeggiator, euclidean sequencer, and a SH-101 inspired step sequencer.
Yarns provides 4 CV outputs and 4 Gate/trigger outputs, which can be assigned to up to 4 voices. In single voice mode, note, velocity, modulation and aftertouch (or other CC) CV are produced, along with a gate, a trigger, and a clock/reset output. In two voices mode, two channels of note, modulation or aftertouch CV are produced, along with two gates, and clock/reset outputs. Finally, in four voices mode, four pairs of CV/Gate outputs are provided.
The 2 and 4-voice modes are available both in a “polyphonic” and “multitimbral” flavour. The former receives chords from one single MIDI channel and dispatches them to the voices; while the later provides independent monophonic parts – which can be addressed to different MIDI channels, keyboard ranges, or even velocity levels. Various note priority modes (low, high, last) and polyphonic allocation schemes (voice-stealing, random, cyclic) allows you to fine-tune the CV/Gate conversion to your playing style. Each voice has a built-in digital LFO to interpret modulation wheel messages as a vibrato; can respond to pitch-bend messages; or can be smoothed with a glide/portamento control – no need for a dedicated module and patches to get the right response from a MIDI keyboard!
Each part can generate sequences either through an arpeggiator/euclidean sequencer combo; or with a SH-101 style sequencer with step-by-step recording, storing up to 64 notes. The module can sync to an external MIDI clock, and generate a clock/reset output at any subdivisions of the MIDI clock.
Other unique features include support for microtunings (either through standard MIDI messages or from a selection of historical tunings or indian ragas), just intonation, and an audio output mode which can transform one, two, or four of the CV outputs into simple digital oscillators.
- Monophonic with note, velocity, modulation wheel, auxiliary CC/aftertouch CV.
- 2-voice polyphonic or 2-part multitimbral with two note CV and auxiliary CC/aftertouch CV.
- 4-voice polyphonic or 4-part multitimbral with four note CV.
- 4-part trigger conversion with MIDI note selection for each part.
- Clock/reset output in monophonic, duophonic, or trigger conversion modes.
- Polychaining mode handling half of the notes internally and forwarding the other half to the MIDI out.
- Split/keyboard ranges.
- Multiple voice allocation schemes in polyphonic mode (voice-stealing, random, cyclic).
- Multiple note priority modes in monophonic mode (lowest, highest, latest).
- Arpeggiator with up/down/up&down/random/chord/”as played” modes and 22 preset patterns.
- 64-note SH-101 style sequencer per part.
- Euclidean pattern generator.
- 1 V/oct and 5V Gate/Trigger standard.
- Micro-tunings (through MIDI tuning messages).
- Just intonation.
- Portamento, pitch-bend and modulation wheel (vibrato).
- Audio output mode replacing the note CV by a digital oscillator offering sine, square, pulse, triangle, sawtooth or noise waveforms.
- 8kHz CV refresh rate, 48kHz refresh rate in audio mode.
- High-end 16-bit DAC and voltage references.
- 12-point calibration table, adjusted in factory.
- 8 memory slots for storing/recalling all settings and sequences.
- Cortex-M3 ARM processor guaranteeing blazingly fast response to MIDI messages, even with a full stack of arpeggiators and sequencers running.
- Open-source hardware and firmware.
- Easy firmware updates through MIDI (SysEx).
- Current consumption: +12V: 60mA ; -12V: 2mA.