Kuro;513113 Wrote: > Hi Phil, > > TacT does resampling to 96K regardless of input. All internal DSP > processing are done at 96K samples and 48-bit precision. It is actually > worst to feed it 96K as the ASRC is not bypassable, so it'll resample > 96K to 96K. Peter Lyngdorf has stated that resampling at the same > frequency will cause artifacts. I can tell on my system that 96K input > to my 2.2xp is not as good sounding as 44.1K or 48K. The best is > actually to feed the TacT with 48K, as the ASRC can do a much easier job > with integer multiple of upsampling. > > 44.1K and 48K are nearly identical sounding if you're like me having an > Apogee Big Ben in the loop. Otherwise, 48K is tiny bit better sounding > than 44.1K. > > Also, beware that the ASRC chip in the TacT is very sensitive to > jitter. It is behaving like a DAC, jitter can cause inaccurate samples > to be created while upsampling.
I'm pretty certain that the 2.2X upsamples to 192... especially as it can output at that sampling rate. Anyway, I've gone back to not bothering with SOX to upsample everything as I can't hear any difference and even feeding 48 into the TACT does NOT involve simple integer upsampling since the ASRC chip works (in the analogue domain) on the ACTUAL sample rate which could be 47.999 or 48.0001 - you get the idea. Sean pointed this out to me a while ago and ( as usual? ) he was right. The jitter sensitivity of the ASRC chip is dealt with by a linear PS for the TACT. No need for Big Ben or similar. The TP is a low jitter source and the new Touch is at least as good IME. -- Phil Leigh You want to see the signal path BEFORE it gets onto a CD/vinyl...it ain't what you'd call minimal... SB Touch Beta (wired) - 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), Townsend Supertweeters, Blue Jeans Digital,Kimber Speaker & Chord Interconnect cables Kitchen Boom, Outdoors: SB Radio ------------------------------------------------------------------------ Phil Leigh's Profile: http://forums.slimdevices.com/member.php?userid=85 View this thread: http://forums.slimdevices.com/showthread.php?t=69145 _______________________________________________ audiophiles mailing list [email protected] http://lists.slimdevices.com/mailman/listinfo/audiophiles
