ADSR Audio Envelope: How to get it?

Question

Nycholas Maia 2017-2-15

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https://ww2.mathworks.cn/matlabcentral/answers/325053-adsr-audio-envelope-how-to-get-it

评论： Walter Roberson 2024-8-9，3:51

How can I get the ADSR sample points of a audio file...Like:

"Fake" example:
[Amp, SR] = audioread(audio.file);
[a d s r] = get_ADSR(Amp);
% Results: The sample position of the Amp vector:
a = 85 % End of Attack -> Attack start = Amp(0)
d = 300 % End of Decay
s = 2456 % End of Sustain
r = 50000 % End of Release

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Walter Roberson 2024-8-9，3:51

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The purpose of Octave is to put Mathworks out of business, so we decline to support it here.

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Answer 1

Matthew Novick 2017-11-7

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https://ww2.mathworks.cn/matlabcentral/answers/325053-adsr-audio-envelope-how-to-get-it#answer_289927

Could you please clarify your question? Is 'audio.file' a generic waveform, and you want a function that will automatically characterize the parameters of an ADSR envelope, similar to that in the Wikipedia link below? https://en.wikipedia.org/wiki/Synthesizer#Attack_Decay_Sustain_Release_.28ADSR.29_envelope