Robin Bowes Wrote: > CardinalFang wrote: > > Robin Bowes Wrote: > >> 3. The very act of running the flac conversion routine on silicon > >> inside > >> the SB causes interference with other parts of the SB (EMF, change > in > >> current draw, voltage drops, etc.). > >> > > > > Would a quick check of the audio effect of varying current demand be > > achievable by listening with the display on and off? That must draw > > more current than any difference in instructions being executed or > > speed of update of the display. > > > It might do. Then again, it might not. > It's usually a feature of high-end gear to be able to turn off the display for sound quality reasons, so it might be worth a blind test. It is a genuine change in current demand, running a different code sequence isn't.
Robin Bowes Wrote: > > > As far as I can see, decoding FLAC only requires a difference > sequence > > of code to be executed and code is code. The same digital data is > sent > > to the audio backend. > > But that code is not being executed when PCM data (as in PCM data > received over the network) is being sent to the DAC. > > I have no evidence that this phenomenon has any effect on the output, > or > that it even exists at all. In fact, I'm highly skeptical. I am merely > highlighting certain things that could *possibly* cause a difference > between natively-decoded flac and flac files decoded on the server. But at the end of the day, the code executed is uing the same instruction set, in fact I bet it's tough to tell the differnce from looking at a random code sequence whether FLAC decoding is going on (unless you wrote the code or are good at spotting codecs). Unless the processor has a sleep mode and shuts down when it has nothing to do, it'll still be executing a code sequence from a fixed instruction set all the time. Unless it is using anciliary features like a FP unit for FLAC and not for PCM, or changing clock speeds, it's actually doing the same thing at a processor level - running instuctions from a limited set of ADDs, MOVEs etc. It'd be a real audiophile mess if you had to choose which compiler or machine code to use for sound quality reasons! :-) What is far more likely in my mind is that FLAC decoding requires less/different network activity or updating the display less often cause fewer peaks of some sort and therefore there *could* be a difference in power consuption and behaviour there (especially in a weak WiFi area), but I think we're clutching at straws here. -- CardinalFang You're only young once, but you can be immature forever... ------------------------------------------------------------------------ CardinalFang's Profile: http://forums.slimdevices.com/member.php?userid=962 View this thread: http://forums.slimdevices.com/showthread.php?t=25138 _______________________________________________ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
