Delay-based Effects

• Delay, or echo, is the process of repeating a signal after a specified duration. Feedback controls the number of times the signal is repeated.
• Reverb,echo, chorus, and flange are all delay-based effects.
• In reverb, there are very many reflections that are so closely spaced together that the effect of multiple delays is barely audible.
• When a modulator, or LFO (low frequency oscillator) is applied to delay, the delay time is affected, becoming shorter and longer. In turn, the pitch of the effected signal rises and falls. For a chorusing or flanging effect, try very short delay times.
• If your delay has a phase invert or 'out of phase' switch, phasing will be heard with short delay times and applied modulation.
• Delay can be used for rhythmic effects. The following algebraic equation gives quarter note delay times in milliseconds to a specified tempo. Sixty divided by the tempo in beats per minutes equals one quarter note in milleseconds, or , 60/bpm=1/4 note(in milleseconds). Other note durations can be derived from this equation. For example, for dotted eighth-notes, divide the 1/4 note delay time by 4, then multiply by 3: (60/bpm)*(3/4)=dotted eighth-notes.
• Delay can be used for stereo imaging by using seperate delay times for left and right.