Test Signal Parameters

[jaakkopasanen]

Lock down and document test signal parameters. Test signal parameters should be locked to have starting frequency of 10 Hz, end frequency of half the sampling frequency and silence duration or 2 seconds. Sweep duration, bit depth and sampling frequency can be read from the WAV file. Locking down start and end frequencies allows ImpulseResponseEstimator instances to be created with a test signal file saved on disk without passing any other parameters.