Audacity Forum

Thank you, Steve. That's a good lesson on how to use local variables, and now I know about the difference between let and let*. I appreciate that you'd take the trouble to show me how to do it right. I have a couple of questions, if you or someone else could help me out. First, I notice that the (s-...

Added more bands, now from 8 Hz to 32 kHz. No longer bombs if frequency extends above Nyquist frequency. This simple process/effect plug-in does band-pass filtering over octave bands at the standard octave band frequencies: 8, 16, 31, 63, 125, 250, 500, 1k, 2k, 4k, 8k, 16 k, 32 k using the built-in ...

This very simple plug-in converts a sound into its RMS (root-mean-squared) amplitude. The sound is windowed into 10 ms segments, the rms computed, and the sound re-interpolated to the original sample rate. It consists exactly of the Nyquist command: (force-srate *sound-srate* (rms s)) The resulting ...

This simple process/effect plug-in does band-pass filtering over octave bands at the standard octave band frequencies: 31, 63, 125, 250, 500, 1k, 2k, 4k, 8kHz, using the built-in 8 pole high- and low-pass filters. It has roughly unity gain in the passband, and rapid rolloff in the stopband. Octave b...

This analyze plug-in may be used to calculate the decay rate (in dB/sec) of an exponentially decaying sound. ; Computes decay rate (in dB/sec) by making a least-squares ; fit to linear-to-dB values. Decay rate and RT-60 (time to ; drop 60 dB) are returned as labels. ; First convert sound into rms va...