bastl-instruments/kastle
Kastle (v1.5)
A mini modular synthesizer with a complex oscillator, voltage-controllable LFO, and stepped waveform generator offering six synthesis modes, headphone output, and 2 in/out CV ports, runnable on batteries or USB power.1161
Capabilities 3
- Complex Oscillatorcomplex-oscillator
- Two-oscillator complex oscillator with six synthesis modes across main and secondary outputs.1161
- LFOlfo
- Voltage-controllable LFO with triangle and square (pulse) outputs and a reset input; rate can be externally modulated.1161
- Stepped Voltage Generatorstepped-cv-generator
- Rungler-inspired stepped voltage generator producing 8 different voltages in random, 8-step, or 16-step loop patterns.1161
Jacks 17 (9 in / 8 out)
| Name | Signal | Voltage | Description |
|---|---|---|---|
| Inputs (9) | |||
| BIT IN | cv | — | Controls the pattern of the stepped generator: low = 8-step loop; disconnected = 16-step loop; high = random pattern.1161 |
| I/O L | mixed | 0V to 5V | Left channel of the stereo I/O port; routes modulation, audio, or clock signals between Kastle and external gear; responds only to 0–5V when used as input.1161 |
| I/O R | mixed | 0V to 5V | Right channel of the stereo I/O port; routes modulation, audio, or clock signals between Kastle and external gear; responds only to 0–5V when used as input.1161 |
| LFO RST | trigger | — | Resets the LFO phase to the triangle's highest point, causing it to begin falling; useful for sync and complex modulation shapes.1161 |
| MODE | cv | — | CV input that selects synthesis mode: disconnected = phase modulation / phase distortion; high = track & hold / formant; low = noise / tonal noise.1161 |
| PITCH MOD | cv | — | CV input for pitch modulation of the main oscillator; amount set by PITCH MOD knob.1161 |
| RATE MOD | cv | — | CV input for LFO rate modulation; amount set by RATE MOD knob.1161 |
| TIMBRE MOD | cv | — | CV input for timbre modulation; amount set by TIMBRE MOD knob.1161 |
| WAVESHAPE | cv | — | CV input for direct waveshape modulation (no attenuator on the jack itself).1161 |
| Outputs (8) | |||
| + | cv | — | Static high voltage output; can set MODE or BIT IN high, or offset modulation signals.1161 |
| - | cv | — | Ground / low voltage reference; sets MODE or BIT IN low, or connects ground between instruments.1161 |
| LFO PULSE | gate | — | Square wave output in sync with LFO triangle; high when triangle is rising, low when falling. Useful for clock sync.1161 |
| LFO TRIANGLE | cv | — | Triangle wave output from the LFO; can be shaped via rate modulation or LFO RST for complex waveforms.1161 |
| OSC OUT | audio | — | Main oscillator output; when another output is patched here it passively mixes with the oscillator signal and routes to the OUT jack.1161 |
| OUT | audio | — | Main audio output of the complex oscillator; can drive headphones directly.1161 |
| SECONDARY OSC OUT | audio | — | Alternative waveform from the secondary oscillator, shapeable by WAVESHAPE; can modulate Kastle internals, mix into OSC OUT, or be sent externally via I/O jack.1161 |
| STEPPED | cv | — | Stepped voltage generator output producing 8 different voltages; pattern is random, 8-step, or 16-step depending on BIT IN state.1161 |
Parameters 7
| Name | Type | Range | Behavior |
|---|---|---|---|
| LFO RATE | knob | — | Sets the speed of the LFO; rate is indicated by an LED and can be externally modulated via RATE MOD input and knob.1161 |
| OSC PITCH | knob | — | Sets the pitch of the main oscillator.1161 Zones tonal-noise-mode
|
| OSC TIMBRE | knob | — | Sets the pitch of the modulating (secondary) oscillator.1161 |
| PITCH MOD | knob | — | Attenuator for the PITCH MOD CV input; controls depth of pitch modulation applied to the main oscillator.1161 |
| RATE MOD | knob | — | Attenuator knob for the RATE MOD CV input; adjusts how much the external signal modulates LFO rate, enabling complex modulation curves.1161 |
| TIMBRE MOD | knob | — | Attenuator for the TIMBRE MOD CV input; sets the modulation depth applied to the timbre (secondary oscillator pitch).1161 |
| WAVESHAPE | knob | — | Controls the third synthesis parameter whose function depends on the active synthesis mode; also sets pulse width of the OSC PULSE output. A dedicated CV input (no attenuator) can modulate it.1161 |
Firmware history 0 versions
No firmware history recorded.
References 2
- [1161]
- [1162]