OGS;578474 Wrote: > I may have misunderstood how this works. I have no real experience with > recording live music so I appreciate the information you present Phil. > If you record an acoustic trio as loud as possible with no clipping in > 24bit, in a hall with medium ambient noise, then when there is no > playing the level meters register around (say) -50 dB. At what digital > resolution is the ambient recorded? > Then you store the recording in 16bit for transfer to CD (I know, noise > shaping is used to improve quality if this was to be a real product). > The level of the ambient noise is still -50dB so what is the digital > resolution now?
1) 24-bit PRECISION. The ambient noise will be represented by word values built from the sum of the lowest 14-15 bits. 2) 16-bit PRECISION. The ambient noise will be represented by word values built from the sum of the lowest 6-7 bits. With proper noise shaping, it will be very hard to tell the difference between the 16-bit and 24-bit versions. (actually you only get 21 bits at best from 24-bit ADC's - the rest is pure noise, but its soooo quiet you can't hear it) A better test is to record the same thing on 2 recorders (24 & 16). Again they will sound very similar... UNLESS you do any DSP after recording and before reducing to 16-bit for release. The effect of DSP (e.g. level changes) is going to benefit from the greater precision of the 24-bit source and the end result will probably sound a bit better than applying the same DSP to the 16-bit version. Basically you get less "rounding errors". -- Phil Leigh You want to see the signal path BEFORE it gets onto a CD/vinyl...it ain't what you'd call minimal... Touch(wired/XP) - TACT 2.2X (Linear PSU) + Good Vibrations S/W - MF Triplethreat(Audiocom full mods) - Linn 5103 - Aktiv 5.1 system (6x LK140's, ESPEK/TRIKAN/KATAN/SEIZMIK 10.5), Pekin Tuner, Townsend Supertweeters, Blue Jeans Digital,Kimber Speaker & Chord Interconnect cables Kitchen Boom, Outdoors: SB Radio, Harmony One remote for everything. ------------------------------------------------------------------------ Phil Leigh's Profile: http://forums.slimdevices.com/member.php?userid=85 View this thread: http://forums.slimdevices.com/showthread.php?t=82050 _______________________________________________ audiophiles mailing list [email protected] http://lists.slimdevices.com/mailman/listinfo/audiophiles
