Signal Types Cheatsheet
Quick reference for Quiver’s signal conventions.
Signal Ranges
| Type | Range | Zero Point | Use |
|---|---|---|---|
| Audio | ±5V | 0V | Sound waveforms |
| CV Unipolar | 0-10V | 0V | Cutoff, rate, depth |
| CV Bipolar | ±5V | 0V | Pan, FM, bend |
| V/Oct | ±10V | 0V = C4 | Pitch |
| Gate | 0V or 5V | 0V | Sustained on/off |
| Trigger | 0V or 5V | 0V | Brief pulse |
| Clock | 0V or 5V | 0V | Timing pulses |
SignalKind Enum
pub enum SignalKind {
Audio, // ±5V AC-coupled
CvBipolar, // ±5V control
CvUnipolar, // 0-10V control
VoltPerOctave, // 1V/Oct pitch
Gate, // 0V/+5V sustained
Trigger, // 0V/+5V pulse
Clock, // Timing pulses
}PortDef Factory Methods
| Method | Signal Kind | Default | Attenuverter |
|---|---|---|---|
::audio() | Audio | 0.0 | No |
::cv_unipolar() | CvUnipolar | 0.0 | Yes |
::cv_bipolar() | CvBipolar | 0.0 | Yes |
::voct() | VoltPerOctave | 0.0 | No |
::gate() | Gate | 0.0 | No |
::trigger() | Trigger | 0.0 | No |
::clock() | Clock | 0.0 | No |
Compatibility Quick Reference
Audio ←→ CV: ⚠ Works but check intent
CV ←→ V/Oct: ⚠ Usually wrong
Gate ←→ Trigger: ✓ Compatible
Clock ←→ Trigger: ✓ Compatible
V/Oct ←→ Audio: ✗ Usually wrong
Common Voltage Conversions
MIDI Note to V/Oct
fn midi_to_voct(note: u8) -> f64 {
(note as f64 - 60.0) / 12.0
}V/Oct to Frequency
fn voct_to_hz(v: f64) -> f64 {
261.63 * 2.0_f64.powf(v)
}MIDI CC to CV
// 0-127 → 0-10V
fn cc_to_cv(cc: u8) -> f64 {
cc as f64 / 127.0 * 10.0
}
// 0-127 → ±5V
fn cc_to_cv_bipolar(cc: u8) -> f64 {
(cc as f64 / 127.0 - 0.5) * 10.0
}MIDI Velocity to CV
fn velocity_to_cv(vel: u8) -> f64 {
vel as f64 / 127.0 * 10.0 // 0-10V
}Pitch Bend to V/Oct
// Standard ±2 semitones
fn bend_to_voct(bend: i16) -> f64 {
(bend as f64 / 8192.0) * (2.0 / 12.0)
}Attenuverter Reference
| Value | Effect |
|---|---|
| -2.0 | Invert and double |
| -1.0 | Invert |
| -0.5 | Invert and halve |
| 0.0 | Silence |
| 0.5 | Half level |
| 1.0 | Unity (unchanged) |
| 2.0 | Double |
Cable Attenuation
Cable::new()
.with_attenuation(0.5) // Scale signal
.with_offset(2.0) // Add DC offsetInput Summing
Multiple cables to one input are added:
LFO1 (+2V) ─┐
├── Input receives +5V
LFO2 (+3V) ─┘
Normalled Connections
When input is unpatched, uses normalled source:
PortDef::audio().with_normalled_to("other_port")