Edit envelope data by mouse
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Dear community,
I am working with big signal envelopes and would like to be able to edit a printed envelope by mouse (drawing parts of the envelope new) which should replace the old data.
x = audioread('1.wav'); % read audiofile
q = hilbert(x); % create envelopes
env = abs(q);
za = env(:,1);
zb = env(:,2);
plot(za); % plot first envelope
Unfortunately I was not able to get any further!
Envelope 1 = original envelope
Envelope 2 = example 1 of modified envelope
Envelope 3 = example 2 of modified envelope
Any help is much appreciated! Thank you!
1 个评论
Image Analyst
2022-12-30
If you have any more questions, then attach your data and code to read it in with the paperclip icon after you read this:
Screenshots also help explain your situation.
回答（2 个）
Sulaymon Eshkabilov
2022-12-29
0 个投票
Star Strider
2022-12-30
0 个投票
2 个评论
Hans Buchele
2022-12-30
I am not certain that this is possible to do interactively. If you know the sort of envelope function you want for the signal, it would be relatively straightforward to apply it, providing that the variation (frequency) in the modulating (envelope) function is sufficiently different from the signal frequency.
Example —
Fs = 1000;
L = 5;
t = linspace(0, 100*L, Fs*L)/Fs;
s1 = sin(2*pi*100*t);
s2 = cos(2*pi*5*t);
s12 = s1.*s2;
[eh,el] = envelope(s12, 5, 'peak');
figure
subplot(3,1,1)
plot(t, s1)
grid
title('s1')
subplot(3,1,2)
plot(t, s2)
grid
title('s2')
subplot(3,1,3)
plot(t, s12)
hold on
plot(t, [eh; el], 'r')
hold off
grid
title('s12')
xlabel('t')
.
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2022-12-29
2022-12-30
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