anoisesrc

Generate a noise audio signal.

The filter accepts the following options:

'sample_rate, r'

Specify the sample rate. Default value is 48000 Hz.

'amplitude, a'

Specify the amplitude (0.0 - 1.0) of the generated audio stream. Default value is 1.0.

'duration, d'

Specify the duration of the generated audio stream. Not specifying this option results in noise with an infinite length.

'color, colour, c'

Specify the color of noise. Available noise colors are white, pink, brown, blue and violet. Default color is white.

'seed, s'

Specify a value used to seed the PRNG.

'nb_samples, n'

Set the number of samples per each output frame, default is 1024.

Command line examples

• Generate 60 seconds of pink noise, with a 44.1 kHz sampling rate and an amplitude of 0.5:

  anoisesrc=d=60:c=pink:r=44100:a=0.5