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manisandher wrote:

The Weiss AFI1 interface is measuring the following clock rates (in KHz) from the Model Two: - 44.122 - 88.244 - 176.488 AND - 48.000 - 96.000 - 192.000 Does this imply that the 48x clock is more accurate than the 44.1x clock in the Model Two? I'm assuming that the 44.1x clock is the same as that in the Model One, so perhaps an 'older' and less accurate design than the 48x clock. How important is a 0.05% inaccuracy in the 44.1x clock rate anyway? Audible? Anything to be worried about, e.g. is this a sign that the clock at the end of its life?

Mani, I do not understand the argument that older clock has less accurate design. What do you mean the “older clock”? The model one has the same 44x and 48x clocks, so there is no older and newer clocks I guess. I presume that in Pacific as in any other processors there are just two base clocks and multipliers. So, one of them is a bit off the calibration. Presumably that it is not a mis-calibration Weiss AFI1 interface the question would be what difference it makes?

If you record and play on the same Pacific then it would make no different of any kind. If you use file from another A/D processors then… how do you know that they were calibrated to the exact sapling rate? I am sure none of them were. So, the question would be: how auditable it is?

If you record at one sapling rate and play at slightly other then you have the absolutely the same effect as tape played at wrong speed. You need 44.100K but you have instead 22Hz away. This will change the tube of your A440 note. Different orchestras, for different music tune the A note to different center frequency, from 420Hz to 475Hz, sometime even more. A few Hertz here and there are auditable but how much the 22Hz of sampling offset (from 44.1K!!!) would relate to a whole note? I did not do circulations but I think it would be in vicinity of 1/131072 (2 power 8) of tone. You might hear 1/64 of note, you might hear 1/128, you might distinct even more but I do not think that you will be able to acknowledge anything more refund. I think anything behind 1/64 of full note is way burden behind the other influences to tine in audio and I do think that might have any practical meaning to look for absolute reference. At least I would not worry about it and would search for other thing to worry.

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