SoundGrid 3.30 is out. This is minor update with some UI fixes and one improvement related to musical scales.
Now list of possible scales to show in instrument selector is automatically determined from set of samples included in instrument packager. Scales definition file is updated every time user opens "Get More Instruments" menu.
Also a new instrument is available - Steinway Piano. It contains 85 stereo piano samples from http://theremin.music.uiowa.edu/MIS.piano.html