ABSTRACT
There are a few effects left over that didn’t have an exact chapter to reside in, so they are presented here. Interestingly, they are some of the simplest to implement but can have a massive sonic impact on the audio they process. These effects include
• Tremolo • Auto-panning • Ring modulation • Wave shaping
The tremolo is a modulated amplitude effect that uses a low-frequency oscillator (LFO) to directly modulate the output. The LFO waveform is usually triangular or sinusoidal. If the LFO is a square wave, it produces a gapping effect, where intermittent chunks of audio are alternatively muted then restored to unity gain. An auto-panning algorithm pans the signal from left to right following an LFO. Since they are both amplitude-based effects we can combine them into one plug-in. The block diagrams are shown in Figure 14.1 .
