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Issue 672492 link

Starred by 2 users
Status: Untriaged
Owner: ----
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OS: Windows
Pri: 2
Type: Bug



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Windows 10 Chrome does not support Win 10 MIDI UWP API and BLE MIDI devices

Reported by happy.mu...@gmail.com, Dec 8 2016 
UserAgent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/55.0.2883.75 Safari/537.36

Steps to reproduce the problem:
1. Connect a BLE MIDI Dongle to Windows 10 PC
2. Pair a Windows 10 to a BLE windows 10 device 
3. Start Chrome
4. Run a page supporting WebMIDI and list the devices

The BLE MIDI device was correctly found by Win 10 code that supports the new Win 10 UWP API

What is the expected behavior?
1. BLE MIDI devices listed

What went wrong?
1. BLE MIDI devices not listed.

Did this work before? No 

Does this work in other browsers? No
 Not applicable

Chrome version: 55.0.2883.75  Channel: stable
OS Version: 10.0
Flash Version: Shockwave Flash 23.0 r0

Windows 10 has a new MIDI API  which also supports Bluetooth
Please update Chrome so that also BLE MIDI devices are supported through the WebMIDI MIDI interface.

Comment 1 by agoode@chromium.org, Dec 8 2016

Status: Untriaged (was: Unconfirmed)
You should be able to enable the new MIDI backend, if you enable the flag:
chrome://flags/#use-winrt-midi-api

It was disabled by default until bugs are fixed in drivers. See https://bugs.chromium.org/p/chromium/issues/detail?id=645403#c8

Give it a try and see how it works. Thanks for filing this bug.

Comment 2 by toyoshim@chromium.org, Dec 9 2016 

Yes, we unfortunately didn't enable it by default because we are seeing a Windows internal bug in the new mode.
If you use other applications that call traditional MIDI API, all MIDI related stuffs stop working sometimes, and it won't be fixed until OS reboot.

We do not have enough data on the new mode. So if you are happy to play with the new mode, reports will be helpful.
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