View Single Post
  #8   Report Post  
Posted to rec.audio.pro
Scott Dorsey Scott Dorsey is offline
external usenet poster
 
Posts: 16,853
Default digital photography vs. digital audio

wrote:
wow, you can move -72db and then +72db with only slight signal
degradation? that's good news. i thought if you moved much more than
6db in either direction you would be causing distress on the audio
file.


6 dB is about one bit.

If you take a 16 bit value, and you store it as a 24 bit integer (scaled
up by four bits), you can attenuate it by four bits (24 dB) or amplify
it by four bits (24 dB) without clipping, truncating, or changing its
value in any way.

The whole point is that the intermediate representation should be wider
than the inputs and outputs, so you have this freedom.

maybe 24 bit recording with 32bit float mixing gives you more
room to move without penalty than i thought.


Oh, go to 32 bit floats and you have enormous room to move.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."