wayne325;418425 Wrote: > Hi all, > > I'm building my own DAC and I want to perhaps use a Transporter 3 as > one of > the inputs.... for purchased music and I want also to rip my CD > collection > so I can get rid of that large cabinet beside my stereo !!!! > > So... a few questions. I guess these are directed at Logitech > technical > types or hobbyists who have already been where I am and have done what > I'm > doing. If you don't KNOW the answer to the question, please keep > your > OPINION to yourself. I'm spending significant time designing and > building > a project and I don't want to have errors designed in. > > Yes I have searched but did not find answers to these questions. > > Firstly, what is the layer 0 protocol of the word clock input? That > is, > what is the voltage / impedance / duty cycle spec for this input? I > see it's a BNC connector but I don't know if it's 50 ohms or 75 ohms > and I've > never been able to find a post on this board that says what the > voltage > or duty cycle are. > > Secondly, it appears that the input rates accepted are 44.1, 48, and 96 > kHz. > What does the Transporter do if faced with 96 kHz word clock input and > a flacsource file that is from a ripped CD.... Does it convert > the input data source (interpolating) to get the data rate to 96 kHz? > > Thirdly, does the Transporter 3 automatically detect the presence of > the > word clock and then use that as a source to lock its PLL to? Or would > I > have to go into some setting menu in SW to tell the Transporter to use > the > word clock or not ? > > Fourth, for those who have a T3 alrady and are playing 96/24 files, is > there > a significant difference between those and CD ripped files? (I would > think > so). Along hese lines I downloaded the sampler 96/24 files from > HDtracks > and played thru my Duet. I thought it was quite dynamic compared to CD. > Note > that the Duet cannot play 96 kHz, I read that the PC SW downconverts > the > 96 kHz sample rate to 48 kHz, and sends that to the Duet. > > Cheers, and thanks.... 1) The word clock is a standard word clock input. IF that doesn't answer your question you are already in trouble :-) 2) Don't know, but the whole idea is that the DAC clock drives the TP. Therefore, a 44.1 kHz rip will NOT be upsampled to anything else. 3) You need to set the TP to use the external clock input 4) No
-- Phil Leigh You want to see the signal path BEFORE it gets onto a CD/vinyl...it ain't what you'd call minimal... SB3 (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 Outdoors: Boom ------------------------------------------------------------------------ Phil Leigh's Profile: http://forums.slimdevices.com/member.php?userid=85 View this thread: http://forums.slimdevices.com/showthread.php?t=62747 _______________________________________________ audiophiles mailing list [email protected] http://lists.slimdevices.com/mailman/listinfo/audiophiles
