fossasia/pslab

I'm want to test transmission through diy guitar effects, so pslab wavegenerator -> some device -> pslab oscilloscope, everything automated via python. I can of course send sinusodial signals (one frequency at a time) from the waveformgenerator to the oscillopscope, but that's inefficient. One could do a sinus-sweep through the audible spectrum or use white noise.

This is how I basically create my waveform:

from pslab import WaveformGenerator
wavegen = WaveformGenerator()
wavegen.load_function("SI1", lambda x: 0.5*np.sin(x), [0, 2*np.pi])
wavegen.generate(channels = 1, frequency = 100)

I don't understand how exactly the frequency enters the formula. For a sin-sweep, I want to modulate the frequency with another sinusodial function with a low frequency - but in the lambda function above the frequency is not stated explictly. Is there a way to pass something like this to load_function:

def myfunction(frequency, phase, time):
    return np.sin(frequency * time + phase)

Another way would be to somehow generate whitenoise from one output...that would basically mean I have to replace the sin function with np.random.random()or something...but there I have the same problem, that I don't understand exactly how the frequency and timestep is passed to the function.

I hope this is understandable, and thank you so much in advance!