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SONAR offers four kinds of dithering:
• Rectangular—basically white noise, and the least CPU-intensive, this
type of dither is more audible than the Pow-r dither types, but works well
with loud projects, or ones that use distortion.
• Pow-r 1—adds a fairly consistent amount of noise below 10k, then quickly
increases. Good for compressed music with few quiet sections.
• Pow-r 2—adds a little less noise than Pow-r 1 until around 9k, then
increases fairly rapidly. More CPU-intensive than Pow-r 1.
• Pow-r 3—adds the least amount of noise in the most audible range, then
jumps up at about 8k and again above 10k. Good for classical music or any
music that has a wide range of volume. Most CPU-intensive and
transparent of all choices.