oscillators¶

class Oscillator(freq=100.0, gain=1.0, offset=0.0, gainct=None, fmct=None)¶

Bases: object

Parameters

freq (float) – Frequency in Hz of the oscillator
gain (float) – Gain from 0.0 to 1.0 of the oscillator, applied after processing
offset (float) – DC offset of signal, applied after processing
gainct – A node that will control the oscillator gain on a sample by sample basis. Type is a class with a get_sample method which takes a time in seconds and returns a PCM sample value
fmct – An array of nodes that will control the oscillator frequency on a sample by sample basis. Type is a class with a get_sample method which takes a time in seconds and returns a PCM sample value

Variables

phi (float) – Current phase offset of the oscillator

gain_to(gain)¶

Parameters: gain (float) – The gain which the oscillator should be adjusted to

get_pcm_value(time)¶

Parameters: time (float) – The time in seconds of which the PCM value should be gotten for
Returns: A PCM value for the oscillator at a given time
Return type: float

get_sample(time)¶

Parameters: time (float) – The time in seconds of which the sample should be gotten
Returns: A PCM value for the oscillator at a given time that has been adjusted with gain and offset
Return type: float

class Random(freq=100.0, gain=1.0, offset=0.0, gainct=None, fmct=None)¶

Variables

time_period (float) – The time in seconds it takes to move from one random value to the next
start_time (float) – The time in seconds at which the last cycle started
start_value (float) – The value that the oscillator moves from during a cycle
end_value (float) – The value that the oscillator moves to during a cycle
range (float) – The difference of end_value and start_value

get_pcm_value(time)¶

Parameters: time (float) – The time in seconds of which the PCM value should be gotten for
Returns: A PCM value for the oscillator at a given time
Return type: float

start_cycle(time)¶

class Saw(freq=100.0, gain=1.0, offset=0.0, gainct=None, fmct=None)¶

get_pcm_value(time)¶

Parameters: time (float) – The time in seconds of which the PCM value should be gotten for
Returns: A PCM value for the oscillator at a given time
Return type: float

class Sine(freq=100.0, gain=1.0, offset=0.0, gainct=None, fmct=None)¶

get_pcm_value(time)¶

Parameters: time (float) – The time in seconds of which the PCM value should be gotten for
Returns: A PCM value for the oscillator at a given time
Return type: float

class Square(freq=100.0, gain=1.0, offset=0.0, gainct=None, fmct=None, pwmct=None)¶

Parameters: pwmct – A node which has a get_sample method which, given a value of time in seconds, returns a pcm value for that time
Variables: th (float) – The threshold of determining a high or low of the square wave

get_pcm_value(time)¶

Parameters: time (float) – The time in seconds of which the PCM value should be gotten for
Returns: A PCM value for the oscillator at a given time
Return type: float

class Tri(freq=100.0, gain=1.0, offset=0.0, gainct=None, fmct=None)¶

get_pcm_value(time)¶

Parameters: time (float) – The time in seconds of which the PCM value should be gotten for
Returns: A PCM value for the oscillator at a given time
Return type: float

sound granular