Mike, Michel, Sean, and other PCM and clock precision lunatics...
The first time I tried SB digital output to Big Ben input, I experienced the same, but only when SB is just powered up. SB's digital output starts from 44.13, then gradually down to 44.10, and locks. Sure, the lock was/is "fragile", but I thought it was OK.
Once I got my SB, and external PS for it, back from the person in France (see Michel's post), I would start using Big Ben as a clock generator to sync SB and DAC (in my case, TacT RCS). Looking forward to the result.
Ken
From: Mike Reeve <[EMAIL PROTECTED]> Reply-To: Slim Devices Discussion <[email protected]> To: [email protected] Subject: [slim] Digital Output Date: Thu, 3 Mar 2005 16:21:30 +0000 (UTC)
Hi
Regarding problems with lock on external DACS ...
About a year ago it was found that the Squeezebox digital output was somewhat off 44.10KHz BUT ... ... Sean quickly [as usual!] fixed this in the firmware.
Fortunately I have always routed Squeezeboxes via a device that buffers the input in a FIFO and then clocks it out using its own high-precision, lower jitter clock, so any such inacurracy has never been a problem for me.
However, out of curiousity I yesterday connected a Squeezebox to an Apogee Big Ben and it registers the Squeezebox at 44.13KHz :-O
[Another long-term issue has been the long settling time of the clock when switching into 'PCM mode' so I left the Squeezebox on repeat all night so that this was not an issue ...]
So, I'm wondering why the 44.13KHz: (a) Has the firmware changed?; (b) Is this 'manufacturing variance'? :-O; (c) ...
Clearly 44.13KHz is way out of the range of some 'high-end' DACs (e.g. AudioSynthesis DACs have a capture window of only +/- 100ppm - approx. 4Hz), so this could be the cause of some peoples' lock problems.
I know other people who read (or at least read) this list (such as Michel, Harry & Victor from the TacTHackers group) have both Squeezeboxes and Big Bens - what do you guys (or anyone else having the two) see as frequency these days ...?
Regards
Mike
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