mple 8: Freeze effect</h3>
<p>We would now like to prevent the sound level from rising indefinitely when we set the feedback level to 1. The idea is to gradually shut down the input when the feedback level exceeds a certain threshold:</p>
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bounce(d,f) = @(d) : *(f);
monoecho(d,f) = *(g) : +~bounce(d,f) with { g = 1 - max(0, f-l)/(1-l); l = 0.95; };
stereoecho(d,f) = monoecho(d,f), monoech