Originally Posted by mink70
I'm wondering whether anyone can weigh in on a strange issue. I'm listening to Amarra 2.4.1 from a MacBook Pro with 4G RAM outputting to a newly acquired (used) MHDT Havana tube DAC. I have to admit that I can't figure out what's happening. Fact is, it's sounding different from day to day...Has anyone experienced anything like this?
Have not heard of the described behavior but, you may want to reduce the number of variables to troubleshoot the problem. Eliminate Amarra and the DAC, and start with iTunes in bit-perfect mode, your old DAC or BIA (built-in audio), and your normal playback chain. Since the behavior seems severe enough, you should be able to tell in just a few seconds whether it's happening or not. Then, one factor at a time, swap out ONE SINGLE COMPONENT in the chain until you locate the source of the problem. Components include software, DAC, amp, cans/speaks, cable, pre, anything that's part of the playback chain.
With a hefty bit of patience and very methodical swapping, you will find the problem. Unfortunately, since the problem is intermittent, it may take a while to localize the culprit.