Hello,
I think they've provided for both MIDI/USB connection modes, since it can be connected via Ethernet to insert it into a keyboard set, read the PDF above carefully... On the first photos or videos available, even at NAMM, the EVN is connected to a piano ( a great potential target ).
I *did*. All modules use either 5 pin midi, or you can use USB B, but the DGX670 that RonP has does *not* transmit via USB B cable to another instrument, only to an A port on a PC. We tested over a dozen keyboards at our store for this exact same reason (someone wanted to use their sx900 as a slave module, and an 88 key controller as the master) and the 5 pin midi out keyboards were too pricy for this customer (although the MX88 was only a little bit more than the DGX670, that was his budget cutoff point, plus he really wanted an 88 with built in speakers as well), so we tested the USB B midi out into the USB B midi in of the PSRsx900. *None* of the other keyboards worked this way, *except* the CASIO PXS (not PX) series. Which was kind of funny, since we'd asked Yamaha, Roland, Korg, & Casio if their USB B midi port could be used this way, and they all replied back with "no", but *shockingly*, the Casio PXS's worked anyway.
And yes we did test the DGX670 for this purpose, it didn't transmit via the usb b.
Also the NAMM demo, it's sitting on top of a digital piano. Based on the front lid, it looks like a Casio.
Also lol that typo at the end of page 1: it weighs 2kg, 41 lbs! (2kg is 4.41 lbs, I assume the "4." got cutoff, but it's still quite the typo!
"How much does it weigh?"
"Spec sheet says 41lbs!"
"Well, sheesh, the Genos, Genos 2 and Korg PA5x61 & 76 are all lighter than a module?"
Mark