OP-1 Midi Note out issues

OP-1 Help
#1

Hello,

Pardon me, but I only have two devices that output MIDI at this time – an OP-1, and a Roland GR-55 Guitar Synth.

The following code works great on my roland guitar synth: montage-organ/montage-organ.html at main · lindseymysse/montage-organ · GitHub

But it does not work on my OP-1. I am connecting to the device as usual, with OP-1 hooked up via USB in MIDI mode, but it doesn’t seem like my OP-1 is broadcasting any MIDI out.

Is there something on the hardware side I should know about?

Thanks!
LNSY

#2

Does the Roland GR-55 have a USB Host port? The OP-1 is only USB-client, and requires a USB-host connection in order to interoperate. There are boxes you can get, like the Kenton USB MIDI Host, that let you connect it to other USB-client connections.

#3

My current signal path is OP-1 in CTRL Mode => USB => LAPTOP => BROWSER

Shouldn’t the laptop act as a USB Host here?

The OP-1 Shows up in the listed devices in the browser… it just doesn’t seem to broadcast any notes

#4

yes laptop is HOST
might be helpful to download a midi monitor app or if u have a DAW or something like that
so u can atleast test to see if the op1 is sending out midi and your laptop is receiving it

also the OP1 sends MIDI out even in regular OP1 mode too

#5

So this is what I’ve found… my OP-1 won’t start outputting MIDI to Chrome until I switch modes from Drum to Synth, or vice versa. I have to switch modes to get the browser to pick it up, though. Which tells me it’s something to do with my software and the OP-1.

Has anyone experienced a similar quirk like this?