music.note_with_glissando

music.note_with_glissando(start_freq=220, end_freq=440, duration=2, alpha=1, waveform_table=array([0., 0.0003835, 0.00076699, ..., -0.00115049, -0.00076699, -0.0003835], shape=(16384,)), method='exp', number_of_samples=0, sample_rate=44100)

A note with a pitch transition: a glissando.

Parameters:

start_freqscalar

The starting frequency.

end_freqscalar

The final frequency.

durationscalar

The duration of the sound in seconds.

alphascalar

An index to begin the transition faster or slower. If alpha != 1, the transition is not of linear pitch.

waveform_tablearray_like

The table with the waveform to synthesize the sound.

number_of_samplesinteger

The number of samples of the sound. If supplied, d is not used.

methodstr

“exp” for an exponential transition of frequency (linear pitch). “lin” for a linear transition of amplitude.

sample_rateinteger

The sample rate.

Returns:

sndarray

A numpy array where each value is a PCM sample of the sound.

See also

N

A basic musical note without vibrato or pitch transition.

V

A musical note with an oscillation of pitch.

T

A tremolo, an oscillation of loudness.

L

A transition of loudness.

F

Fade in or out.

Examples

>>> write_wav_mono(note_with_pitch())  # writes file with a glissando
>>> s = H([note_with_pitch(i, j) for i, j in zip([220, 440, 4000],
                                                 [440, 220, 220])])
>>> write_wav_mono(s)  # writes a file with glissandi