How to play a variation of frequency?
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Hi,
1)Starting from a pure wave of a given frequency (4000 Hz) I can not implement this pseudo code to play a sound (pure wave) whose frequency decreases continuously from 4000 to 200:
demo matlab
t = (0:0.001:100)';
for n = 4000:-1:200
y = sin(2*pi*n*t)
sound(y,Fs);
end
How to implement this correctly?
2)same question but starting from an very short audio file or an sound sample
thanks
3 Comments
Walter Roberson
on 3 Oct 2018
That code changes frequency in two different ways simultaneously. You should not do that. Either change the n used in the construction of y or else change the frequency used for playback, but do not do both.
Hint: changing the n used in the construction of y is much easier to put together into a single .wav file than if you change the playback frequency.
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