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Android 8 with Clavia MIDI

PostPosted: 07-15-18 6:28 am
by offrhodes

this relates to 10.4.4393 on Android 8, both a Huawei MediaPad M5 (Android 8.0.0) and an older Nexus 5 (Android 8.1.0) with a USB 3.0 adapter cable:
MIDI works fine with a Roland GoPiano (which is a fairly modern device), but I can't make it to work with Clavia Nord Keyboards, tried Stage 2.0 EX and Electro 5 (both fairly recent keyboards)
What happens is that Synthesia hangs, either on opening (once it shows the USB MIDI device in the list of inputs), or on programming the range after the first noteon event it receives.

There is a program on PlayStore called "USB MIDI monitor" (BTW: recommended - free, no ads). This one shows correct MIDI operation for both Android devices.
The Clavia USB interface is a known troublemaker : I did some unrelated experiments with bare-metal programming on a Raspi where the GoPiano works fine but the Clavia unit crashes the USB driver after a minute or two. I suspect it's class-compliant but configured very aggressively for lowest latency.
But as said, it works fine with the USB MIDImon app, so it may be some simple issue on the Synthesia side, e.g. the driver is producing a higher rate of time stamps than expected or something like that (just guessing).

Re: Android 8 with Clavia MIDI

PostPosted: 07-15-18 10:53 am
by offrhodes
works with the latest beta (wasn't aware of it until now).
Case closed...

Re: Android 8 with Clavia MIDI

PostPosted: 07-15-18 12:26 pm
by Nicholas
Yep, the beta uses the new MIDI features introduced in Android M. It's good to hear things are working for you now! :)