I can confirm I'm experiencing essentially the exact same issue on my Stadium XL. I'm using a Walrus Canvas Clock via 5-pin MIDI DIN and see the same small BPM fluctuations and audible jitter/artifacts. I also tested Logic Pro sending MIDI Clock directly to Stadium via USB-C and experienced the same behavior. When I use Stadium's internal tempo, the problem disappears. I've also factory-reset and updated the Canvas, and direct Canvas → Stadium produces the same result. It appears to be related to Stadium's handling of incoming MIDI Clock rather than the clock source.
