As with most effects it can become tiresome if used too much but used in moderation it can enhance and enliven recordings.
The name comes from a "chorus" or "ensemble" of players or singers, though the sound of this effect only loosely approximates to a real ensemble.
When a group of (real) instruments play together, there is invariably small differences in the pitch, timing and tone of the notes being played by each instrument. What a Chorus effect does is to create a slightly delayed and detuned copy of the input sound and mix it in with the original sound. The amount of pitch difference and delay slowly changes over time. A "multi-voice" Chorus effect produces several copies of the sound, each delayed and pitch shifted by a different amount.
In spite of its popularity, Audacity has never included a Chorus effect, so I thought it was time to make one.
The controls of this chorus effect are similar to what might be found on a guitar "stomp box" chorus effect, but with the addition of a "limiter" that can prevent the output from exceeding 0 dB. This is a stereo effect, but is also compatible with mono tracks.
- Speed: (0 to 10) Higher values cause the effect to vary more rapidly. Low settings can produce a slow "flanging" effect.
- Depth: (0 to 10) How much variation in pitch (and delay). Low settings can produce a subtle "shimmer" to the sound. Very high settings can create an "out of tune" warble.
- Voices: (1 to 4) The number of copies of the sound that are delayed / pitch shifted (per channel). For a simpler, cleaner effect try using one or two voices. For a more complex effect try increasing the number of voices.
- Mix: (0 to 10) How much of the effect is mixed in with the original signal. Low settings produce a more subtle effect.
- Output Limiter: (Enabled or Disabled) The output from this effect may be higher than the original sound. When the output limiter is enabled, any peaks that would exceed 0 dB will be compressed so as to prevent clipping.