detectMinFrequency

maelzel.snd.freqestimate.detectMinFrequency(samples, sr, freqThreshold=30, overlap=4, lowAmpSuppression=0.1, refine=True)

Detect the min. frequency in this audio sample

Parameters:

• samples (ndarray) – the samples to analyze

• sr (int) – the sample rate

• freqThreshold – the lowest freq. to considere

• overlap – the amount of overlap analysis per window

• lowAmpSuppression – how much to supress low amplitudes

• refine – if True, refine the freq and time data. This allows to performe a more coarse pass with a low overlap (for example, 4) and then a short pass with a higher overlap to obtain a more accurate value

Return type:

tuple[float, float]

Returns:

a tuple (min. freq, corresponding time) or (0., 0.) if no pitched sound was detected