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Glad you're enjoying your M-DAC! I still think the identical setup should not require a different jitter rejection setting from from one optical input to another... I guess it depends on how likely you are to need them both in the foreseeable future. If so, it might be worth looking into.
And speaking of looking into, since it's optical, do you check if there was some obstruction/dust in that input, maybe -carefully- use a bit of compressed air to blow away any small bit of debris or similar?
See below, but nah... other devices (Desktop & High-End CD player) work just fine in that (Opt1) input, so I'm keeping it. I'm chalking it up to just a sensitivity to whatever the Laptop is doing... even though the laptop works perfectly in Opt2. Who knows.
And you are correct, the jitter rejection settings have no effect.
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You should try changing the jitter rejection of the port. Change optical 1 to medium, if that does not work try high.
If you have the latest firmware these options should be in the menu, on stock fw you can't do this.
I do believe that less jitter rejection is supposed to give better sound quality, so go for medium before trying high. I think there is a difference on stock jitter rejection setting for opt1 vs opt 2, which would explain why 2 works but not 1.
Hope that helps!
Thanks for the advice... same as the Toronto shop gave me. That didn't work... none of the jitter settings worked. Just must be some incompatibility with the laptop optical in that input, at that setting. I tried a high-end CD player and it worked just fine.
And since computer #2 optical out also works fine, I'm just going to keep this and chalk it up to a bad output from the laptop.
As for the sound... Wonderful.
Every day the sound seems to improve and become more natural and 'acoustic', while maintaining remarkable transients and detail. It has very good impact and depth. I'm quite pleased. Its sound has more in common with the Audio gd NFB-12, than it does with the Benchmark. It also is somewhat similar to the ASUS Xonar STX in its richness.
Add to that, the ability to now use my DT-880-600's with the steep roll-off (Optimal Transient DD), and I'm quite pleased. The DT-880 has always been just a bit bright for me, and this filter really helps.
So at this point, I'm a happy camper. This is a great little DAC.