On Monday 05 October 2009 13:20:14 Johannes Wiedersich wrote: > Boyd Stephen Smith Jr. wrote: > > It is purely digital. 16-bit (not sure if this is floating- or > > fixed-point), stereo, 44.1 kHz samples, IIRC. > > What's the difference between 16-bit floating-point and 16-bit > fixed-point? I always thought those are just integers.
Some audio codecs use floating-point, which is like a "float" or "double" or "long double" in the C programing language. Some bits are the exponent (usually with a bias) and some bits are the mantissa. Other audio codecs use fixed-point, where the 16-bits simply a signed integer (or possibly an unsigned integer modified by a bias). I think CDs are fixed-point, but I'm not entirely sure on that. Both fixed- and floating-point have advantages, and I know various audio formats and programs use both. 8-bit fixed-point unsigned has exact values for [0,1,2,...,255] 8-bit floating point unsigned might have exact values for [0,1,2,...,63], [64,65,66,...,127], [128,130,132,...,254], and [256,260,264,...,508]. -- Boyd Stephen Smith Jr. ,= ,-_-. =. b...@iguanasuicide.net ((_/)o o(\_)) ICQ: 514984 YM/AIM: DaTwinkDaddy `-'(. .)`-' http://iguanasuicide.net/ \_/
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