Dear Jacques,
Since I’m on holidays just a brief answer.
The main output of the MU1 is its AES3 outputs, since they offer the low jitter clock. The USB outputs can be connected to a USB DAC if you like, but the MU1 will then just offer standard Roon performance.
The functionality of the MU1 main button is the same as that of the LS1r remote. People like it when they are used to it. The responsiveness is further tuned in the upcoming software release. Grimm Audio is a much smaller company than Naim. We cannot afford to wait till the software of a device like the MU1 is developed to perfectness. Besides: customers who heard the beta units literally forced us to release it even before the v1.0 firmware was finished. They wanted their unit so badly they could not wait. The sound quality of the clock and upsampler were as intended right from the start.
I hope this helps to clarify our choices.
All the best,
Eelco
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