stimuli.audio.Tone🔗

class stimuli.audio.Tone(frequency, volume, duration, sample_rate=None, device=None, n_channels=1, *, backend='sounddevice', clock=<class 'stimuli.time._clock.Clock'>, **kwargs)[source]🔗

Pure tone stimulus at a given frequency.

Parameters:

frequencyfloat: Frequency of the tone in Hz.
volumefloat | list of float | tuple of float | array of float: Volume of the sound as a percentage between 0 and 100. If a float is provided, the same volume is used for all channels. If a sequence is provided, the length must match the number of channels.
durationfloat: Duration of the sound in seconds, used to generate the time array.
sample_rateint | None: Sample rate of the sound. If None, the default sample rate of the device provided by the backend is used.
deviceint | None: Device index to use for sound playback. If None, the default device provided by the backend is used.
n_channelsint: Number of channels of the sound.
backend"sounddevice": The backend to use for sound playback.
clockstimuli.time.BaseClock class: Clock object to use for timing measurements. By default, the stimuli.time.Clock class is used.
**kwargs: Additional keyword arguments passed to the backend initialization.

Attributes

`duration`	The duration of the audio stimulus.
`frequency`	The frequency of the tone in Hz.
`sample_rate`	The sample rate of the audio stimulus.
`signal`	The audio signal.
`times`	The time array of the audio stimulus.
`volume`	The volume of the audio stimulus per channel given as a percentage.
`window`	Window applied to the audio signal.

Methods

`play`([when, blocking])	Play the audio data.
`plot`()	Plot the audio signal waveform.
`save`(fname, *[, overwrite])	Save the audio stimulus to a WAV file.
`stop`()	Interrupt immediately the playback of the audio data.

play(when=None, *, blocking=False)[source]🔗

Play the audio data.

Parameters:

whenfloat | None: The relative time in seconds when to start playing the audio data. For instance, 0.2 will start playing in 200 ms. If None, the audio data is played as soon as possible. A duration superior to the device latency is recommended.
blockingbool: If True, the function blocks until the audio playback is finished.

plot()[source]🔗

Plot the audio signal waveform.

Returns:

fmatplotlib.figure.Figure: The matplotlib figure object.
axmatplotlib.axes.Axes: The matplotlib axes object.

save(fname, *, overwrite=False)[source]🔗

Save the audio stimulus to a WAV file.

The saving is handled by scipy.io.wavfile.write().

Parameters:

fnamestr | pathlib.Path: Path to the output file. The extension should be '.wav'.
overwritebool: If True, existing files are overwritten.