Welcome to the Reaper Forums!
In case you haven't already found them, make sure to check out the User Guide (
https://www.reaper.fm/userguide.php) and Videos section (
https://www.reaper.fm/videos.php) in general. Lots of useful info there.
Quote:
Every time I do anything in Reaper this error window opens. I continue to close, how do I close this window for good to stop opening? My mini is not on this list. See Attachment
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You can click on the
Do not show this window again checkbox (at the bottom left) in the popup window before closing it.
Quote:
Also, I test my mini output, no sound. Don't I have to give the track a sound like VST?
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Yes. You'll need load a VST instrument onto the Track in order to produce any sound from the incoming MIDI.
You can do this for instance by using the
Insert > Virtual instrument on new Track menu which sets up some Track settings automatically (Record Arm + Input Monitoring button enabled, MIDI Channel set to 'All inputs').
More info here:
https://www.reaper.fm/videos.php#BvSC-6qq1vs