Build an audio burst generator
When examining overload recovery in AC-coupled amplifiers or when testing the attack/release behavior of audio compressors, well-defined tone bursts come in really handy. This simple circuit accepts a steady tone from an ordinary audio oscillator at its input, and produces bursts at its output. The duration of the burst as well as their repetition rate are variable from less than a millisecond to several seconds. The amplitude and switching point are, of course, also adjustable.