This is a pretty old version of Synthfont. It contains some bugs, but it is fully usable. Note cutoff adjuster doesn't work, so you'll probably get flooded with notes pretty soon with a complex midi file. But you can still render to .wav (this version doesn't support other formats).
Old test results
The test results you have selected are very old and may not represent the current state of Wine.
Selected Test Results (selected in 'Test Results' table below)
Everything I've tested.
What does not
Maybe some VST effects..
What was not tested
As usual, the install is just a zip file - however, it is very difficult to find this version nowadays.