I just got my OB 6 and have encountered two strange issues with the digital effects section. The first one - earlier today I turned on the OB to have a play. Left for a couple hours to run some errands, returned home and found that whenever I turn on the effects section, the sound quality was degraded substantially, like when you drop the sampling rate - very thin and grainy sounding. This was the case in both effects banks and regardless of which effect was selected, with the mix knob all the way dry. I reset the OB6 to the default patch and the issue persisted, but when I turned the unit off and on again, it had disappeared.
That brings me to the second and current issue - though not as problematic as what I described above, there's a volume difference when I engage the effects section, again despite which bank or effect is selected. It's not massive but I checked this behavior against my Prophet 6 and the P6 doesn't do this. In fact, the effects section on the P6 is totally transparent - I only hear a sound difference when actually turning up the mix on a selected effect, as it should be.
Is anyone else experiencing this? Frankly I'm experiencing a couple strange quirks on the new OB that give me pause, especially since it was not a cheap synth and my P6 from 2015 never had any of these issues.