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audacity-support/nyquist-plugins/generator-plugins/sequence-generators.md

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Sequence Generators

Rndtone

Generates random sine waves.

{% file src="../../.gitbook/assets/rndtone.ny" %} Download link {% endfile %}

{% file src="../../.gitbook/assets/rndtone.wav" %}

Details

Author: Steven Jones.

Generates random sine waves. The generated tones have random frequencies, attack and decay times.

Parameters:

  1. Duration: [1 - 30 seconds, default 20]
  2. Density: [1 - 100 generated tones, default 60]
  3. Floor: [20 - 1000 Hz, default 300] - Lowest frequency of tones
  4. Ceiling: [20 - 1000 Hz, default 600] - Highest frequency of tones

SQ1 Generator Sequencer

Algorithmic generator sequencer number 1.

{% file src="../../.gitbook/assets/sq1.ny" %} Download link {% endfile %}

{% file src="../../.gitbook/assets/sq1_generator_sequencer.wav" %} SQ1 Generator Sequencer {% endfile %}

Details

Author: Steven Jones.

Algorithmic generator sequencer number 1. Note also the Audio Selection Sequencer 2 on the Effect Plugins page which sequences pre-existing audio samples. The sq1 sequencer generates complex sequences of tones by using the sum of three square-wave low frequency oscillators to frequency-modulate two oscillators. The oscillators output one of four waves (sine, tri, square and saw) and may be frequency adjusted relative to each other. The wave tables are not band-limited so aliasing will result for sufficiently high frequencies. There is also an overall three-stage amplitude envelope.

Parameters:

  1. Center: [0 - 10000 Hz, default 440] - the unmodulated carrier frequency
  2. Detune: [0.25 - 4.00, default 1.01] - the frequency of oscillator 2 relative to oscillator 1
  3. Wave: [0=sine, 1=tri (default), 2=square, 3=saw]. Wave shape for both oscillators
  4. Attack: [0 - 10 seconds, default 1]
  5. Sustain: [0 - 10 seconds, default 1]
  6. Decay: [0 - 10 seconds, default 1]
  7. f1: Frequency of LFO 1
  8. a1: Amplitude of LFO 1 - LFO amplitudes are calibrated in Hz indicating the corresponding frequency shift in the audio oscillators.
  9. f2: Frequency of LFO 2
  10. a2: Amplitude of LFO 2
  11. f3: Frequency of LFO 3
  12. a3: Amplitude of LFO 3

Note that the three LFOs are interchangeable.