tri~

Antialiased triangular oscillator

Description

tri~ generates a triangle wave whose component frequencies are resistant to aliasing.

Arguments

Name Type Opt Description
initial-frequency (Hz) int or float First argument sets the initial frequency of the oscillator. The default is 0. Second argument sets the duty cycle. The default is 0.5.

Messages

int frequency (Hz) [int]
In left inlet: Sets the frequency of the oscillator.

In middle inlet: Sets the duty cycle of the oscillator. Signal is wrapped into the range 0-1. A value of 0.5 will produce a triangular wave that spends equal amounts of time sloping positively and negatively.
float frequency (Hz) [float]
In left inlet: Sets the frequency of the oscillator.

In middle inlet: Sets the duty cycle of the oscillator. Signal is wrapped into the range 0-1. A value of 0.5 will produce a triangular wave that spends equal amounts of time sloping positively and negatively.
signal In left inlet: Sets the frequency of the oscillator.

In middle inlet: Sets the duty cycle of the oscillator. Signal is wrapped into the range 0-1. A value of 0.5 will produce a triangular wave that spends equal amounts of time sloping positively and negatively.

In right inlet: (optional) A sync signal. When the control signal crosses from below 0.5 to above 0.5, the oscillator resets itself. A phasor~ object works well for this purpose. The classic use is to "sweep" this control signal in a frequency range somewhere at least three or four octaves higher than the fundamental frequency.

Information for box attributes common to all objects

Output

signal: An antialiased triangular waveform. An ideal, straight-line triangular wave generated in a computer contains aliased frequencies that can sound irritating. tri~ produces a nice, analog-esque output waveform.

Examples

Spectral comparison of tri~ and an ideal triangular wave

See Also

Name Description
cycle~ Table lookup oscillator
phasor~ Sawtooth wave generator
rect~ Antialiased rectangular (pulse) oscillator
saw~ Antialiased sawtooth oscillator
techno~ Signal-driven step sequencer
triangle~ Triangle/ramp wavetable
MSP Tutorial 3: Wavetable Oscillator MSP Tutorial 3: Wavetable Oscillator