I have the midi controller M-VAVE SMC-Mixer.
Midimapping works great - except the sliders!.
They are delivering pitch wheel values instead of control messages.
Is there any way to get this working in Renoise?
Hello,
Your controller has “Mackie protocol”
It can make maybe help you.
And the doc of your hardware,I read that:
Thank you sooooooooo much! 
https://www.cuvave.com/appdownload
Here you can download MidiSuite and change the device from daw to cc mode and everything works fine.
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RTFM 
You can switch from DAW to CC Mode via shortcut
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