SoundDeviceSamplesGenerator¶

class acoular.sdinput.SoundDeviceSamplesGenerator¶

Bases: SamplesGenerator

Controller for sound card hardware using sounddevice library

Uses the device with index device to read samples from input stream, generates output stream via the generator result().

device = Int(0, desc="input device index")¶

input device index, refers to sounddevice list

numchannels = Long(1, …¶

Number of input channels, maximum depends on device

collectsamples = Bool(True, …¶

Indicates if samples are collected, helper trait to break result loop

sample_freq = Property( …¶

Sampling frequency of the signal, changes with sinusdevices

overflow = Bool(False, …¶

Indicates that the sounddevice buffer has overflown

running = Bool(False, …¶

Indicates that the stream is collecting samples

stream = Any¶

The sounddevice InputStream object for inspection

device_properties()¶

Returns:

Dictionary of device properties according to sounddevice

result(num)¶

Python generator that yields the output block-wise. Use at least a block-size of one ring cache block.

Parameters:

numinteger

This parameter defines the size of the blocks to be yielded (i.e. the number of samples per block).

Returns:

Samples in blocks of shape (num, numchannels).

The last block may be shorter than num.