Apple Logic Express 7 - Manual (Page 71)

Chapter 1 Using Logic 71
POW-r offers three distinct dithering modes.
• No Dithering: No dithering is applied.
• POW-r #1: uses a special dithering curve to minimize quantization noise.
• POW-r #2: (Noise Shaping): uses additional noise shaping over a wide frequency
range, which can extend the dynamic range by 5 to 10 dB.
• POW-r #3: (Noise Shaping): uses additional, optimized noise shaping which can
extend the dynamic range by 20 dB within the 2 to 4 kHz range—the range the
human ear is most sensitive to.
Note: Noise Shaping minimizes side effects caused by bit reduction through spectral
displacement of quantization noise above 10 kHz—the range the human ear is least
sensitive to.
The mode which will sound the best to you is primarily dependent on the program
material and on your personal taste. The “right” setting is best determined by
auditioning the audio material with each of the dithering modes.
Important: Dithering the same audio signal multiple times should be avoided.