How can I plot frequency vs. amplitude of a .wav file?

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Michael Nagler
Michael Nagler 2016 年 4 月 4 日
コメント済み: Jan 2018 年 4 月 13 日
Hello all, I'm trying to analyze pitches in songs represented as wav files. I want to be able to look at the frequencies vs. amplitude of the signal. I don't care about time, so I don't want a spectrogram, and using a periodogram gives me frequency vs. power/frequency. Is there a way to just look at frequency and amplitude? Thanks.

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回答 (1 件)

Star Strider
Star Strider 2016 年 4 月 4 日
The code between the top two plot figures in this documentation for fft will give you everything you need to know to plot your signal.
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Sai Krishna Reddy Satti
Sai Krishna Reddy Satti 2018 年 4 月 13 日
Can you please tell me how can I determine the values L(time), x, y for a wav file? I am new to Matlab and do not know how to proceed.
Jan
Jan 2018 年 4 月 13 日
@Sai Krishna Reddy Satti: Import the WAV file at first by audioread. Then the length of the signal is the size of the first dimension. x and y are the two channels of the signal, so you do not create them.

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