pippin wrote: > Hi, let me chime in for one more question: did I overlook the test for > server-side FLAC decoding vs. FLAC decoding on the touch itself? > I would be really interested in that one, especially also in a > comparison between the WiFi vs. Ethernet performance. > > The rationale is that counter to "conventional" audiophile wisdom my > experience when testing 96/24 playback in iPeng was that the raw PCM > data actually caused a noticeably _higher_ system load compared to FLAC. > What this means is, that he system load caused by decoding FLAC is > actually less than the load caused by the higher amount of data (roughly > factor 2) for PCM. It was quite noticeable even on a device as > performant as iPad 3. > > Now, the iPad of course always uses WiFi (no Ethernet there) and it's > quite obvious that the load actually HAS to be higher: all the data > needs to go through the WPA decoding which certainly requires more power > than FLAC decoding. > But then I'm not sure that the WPA decoding isn't done in the WiFi > chipset so that the CPU (where I noticed the difference in load) doesn't > ever get involved. > > Any chance you'd run one (OK, four) more test(s)?
Hi Pippin; great work on iPeng BTW! Been using it for years :-) On the 1st page of this thread for the Touch measurements "MEASUREMENT: Logitech Squeezebox Touch (Pt 2)", I measured the WiFi vs. ethernet conditions (16/44 & 24/96) using the Touch's analogue output and found no difference. This was with "native" FLAC decoding on the device itself. So you're interested in whether server side decoding (hence higher data transmission of PCM) might add to the noise level of the analogue outputs? Is that an accurate summary of what you'd like to see? ------------------------------------------------------------------------ Archimago's Profile: http://forums.slimdevices.com/member.php?userid=2207 View this thread: http://forums.slimdevices.com/showthread.php?t=97950 _______________________________________________ audiophiles mailing list [email protected] http://lists.slimdevices.com/mailman/listinfo/audiophiles
