File:Audio passthrough.grc
Audio_passthrough.grc (file size: 4 KB, MIME type: text/plain)
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This flowgraph takes audio from the audio source, squares it, to get something proportional to the instantaneous power, then low-pass filters it to approximate an averaged-out power, applies a Threshold to it. The latter starts outputting 1s as soon as the smoothed power crosses 10% of the maximum power, and turns back to generating 0s when it falls below 5%.
The resulting stream of 1s and 0s is multiplied with a 440 Hz tone and then fed into an Audio Sink, allowing the user to hear a tone for as long as there's enough sound at the input.
Screenshot: 
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| Date/Time | Dimensions | User | Comment | |
|---|---|---|---|---|
| current | 00:44, 7 January 2022 | (4 KB) | MarcusMueller (talk | contribs) | This flowgraph takes audio from the audio source, squares it, to get something proportional to the instantaneous power, then low-pass filters it to approximate an averaged-out power, applies a Threshold to it. The latter starts outputting 1s as so... |
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