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I'm new to DSP and I'm learning as I go. I have an audio file with a chirp signal(2kHz). I played and recorded this chirp signal and the recording has a lot of environmental sounds.

Here is my code:

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  • $\begingroup$ You could feed the signal through a 2kHz high-pass signal and monitor its output. If the output is above some threshold for X amount of time, you can consider the signal to have started. $\endgroup$ – Izzo Apr 5 at 1:53
  • $\begingroup$ You might find this and this useful. $\endgroup$ – A_A Apr 5 at 9:30

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