I don't yet have the Micro Clock, so I cannot perform a field test just yet. But this is the issue... I have a Digi Design 003R+ with the BLA Signature Mod, instead of the internal clock mod the 003R+ because of the increased number of mic pres is fitted with an external BLA Micro Clock for the signature mod.
Now, I also own a Mytek two channel ADC. I have always read that an internal clock is much more efficient to the external clock. And I am wondering whether or not I should slave the Micro Clock to the Mytek or vice-versa and slave the Mytek?
Black Lion Audio wrote,
"If I recall correctly, the Mytek and the Micro Clock actually have similar published specs in terms of jitter (under 10 picoseconds). Our published spec is based on measured jitter at the output, but I don’t know exactly where in the circuit Mytek’s measurement is derived. The phase noise performance sets them apart significantly though, and this is a difference that is quite audible (there are published phase noise specs on our website, something that no other clock manufacturer provides). Add to this the fact that when the 003 is locked externally to the Micro Clock mk2, measured jitter performance at the converter is about 3 picoseconds (it measures exactly the same as our internal clock). There are Bode plots available on the website that show this; click on the Micro Clock mk2 page and scroll down.
Have you heard the A/B clips we tracked using our Signature Series and the Mytek ADC96? They’re also available on our website. Click on the ‘audio’ tab, then click on the ‘signature series’ link. I think you’ll be pretty impressed with the performance of Micro Clock mk2 when compared to the Mytek clock. Try using the Micro Clock mk2 as a master for both units."
However, on their website's FAQ they are asked the opposite question concerning a customer using an external clock and they replied with the seemingly opposite answer. I'm not suggesting there is not enough room here for my pea brain to misunderstand something... but it seems like a bit of double talk... no?
Q - I use a master clock for the 002R through the SPDIF line. Will I notice any improvement if I get the clock modified?
A - Clocking through SPDIF is a very poor means of reclocking, but unfortunately the 002R is limited in that respect. The SPDIF clock data is carried right alongside the audio data, so modulations of clock information can result. What's more, a capacitive SPDIF cable will cause the clock signal to become mis-shapen. Both of these things can contribute to jitter. There is no comparable substitute for a good internal clock. Our 002R clock will give you far better performance than you'll get from any external master clock.
I'm sure the only way to tell for myself is to listen. Which I should be able to do in a week or so. But, perhaps someone of you have wrestled this issue and come up with some fairly concrete results. If so please share...