pfarrell;543694 Wrote: > darrenyeats wrote: > > mswlogo;543633 Wrote: > >> The DSP processing is done in 48bit. > > I can understand how 48 bits helps the DSP to be more transparent > (less > > rounding errors). > > Its not just rounding errors. Nearly all DSP is done by converting the > time-doman signal to the frequency domain using a FFT. DSP chips are > notable because they do a combined multiply-and-add function quickly, > usually massively parallel processing. Nearly all of the time, they > are > actually working on floating point numbers, not the 16 or 24 bit > integers that most audiophiles are used to talking about. > > When you do as many multiply and add functions as a typical DSP does, > and we are talking about tens of thousands, you need to be very > careful > with the numerical analysis. Its much more complicated than simple > rounding of a few bits. This whole thread has been off in the weeds > for > weeks. A "digital volume control" is talking about a nearly trivial > single multiply or shift function. > > DSP is more like dealing with quantum physics rather than Newtonian > physics. > > > -- > Pat Farrell > http://www.pfarrell.com/
Correct a lot of DSP is done in floating point. I'm told by some that know the internals of Meridian stuff better than I do (it's burried in some papers to). That they use 48 bit integer math in the speakers. We are not talking about DSP used for volume but DSP used for Crossovers. And how much that would care if the data was shift down. I'm saying they generally would not care. Whether that math is done in 48bit integer, 72bit integer (which Meridian also uses) or 64bit float. It's the same if you know what your doine. The point is you have all the data and you don't do the crossovers in 24bit integer math. -- mswlogo XP > Cat5 > Transporter/DuetController > SPDIF > Meridian G68 > DSP6000, DSP5500HC, DSP5000 XP > Cat5 > SB3 > SPDIF > Meridian DSP5000 XP > Cat5 > DuetReceiver > SPDIF > Meridian G91 > DSP5000 'My Transporter Setup' (http://forums.slimdevices.com/showpost.php?p=350741&postcount=45) 'Hitch Hikers Guide to Meridian' (http://www.meridianunplugged.com) ------------------------------------------------------------------------ mswlogo's Profile: http://forums.slimdevices.com/member.php?userid=9090 View this thread: http://forums.slimdevices.com/showthread.php?t=77725 _______________________________________________ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/audiophiles
