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"Microsoft GS Wavetable Synth" on Windows 10 not working with midiOutOpen

Reinhold Hoffmann asked on


we use the "Microsoft GS Wavetable Synth" through midi port Windows functions in Visual Studio. We have created a little routine to check the availability of "Microsoft GS Wavetable Synth" on Windows 10 which we use it since many years.

Opening the MIDI port=0 which is "Microsoft GS Wavetable Synth" with the Windows function "midiOutOpen" causes an MMSYSERR_ERROR (unspecified error). Below you can find a C++ code snipset we used. This code snipset works fine for XP through Windows 8.1 but on Windows 10, the MIDI port=0 cannot be opened with this procedure. (this procedure was created with VS2010, Win32 and tested on Windows 10 Build 9879)

With regards to the "Microsoft GS Wavetable Synth", we have a few questions:

- will it be part of the delivery of Windows 10 as it was part in former Windows versions?

- will the interface of the Windows midi functions like midiOutOpen supported?

- does VS2010 with its libs work for Windows 10?

Any comments or help is highly appreciated.



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This question is outside the scope of this site and needs to be asked either on Technet or MSDN

Cat herder
Windows Insider MVP
MVP-Windows and Devices for IT
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Reinhold Hoffmann replied on


To be honest, I disagree to have this being posted somewhere else.

It is of many folks and companies interests if "GS Wavetable Synth" is still supported in Windows 10 or not. So far all I can see is that it is "some partly" included but won't work. Given the discussions in previous Windows version this should be clarified upfront.

Or does Microsoft offer another MIDI Synth like those from OS X which provide great sounds?

Hope I made it clear.



PS. with regards to my code, I just wanted to provide Microsoft some help, but just ignore it.

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