Download SFZ+ and launch the installer. When prompted for a location, choose your DAW's default directory for VST plugins.
Launch your digital audio workstation of choice and create a new track. Launch the plugin loader for the track in question and choose SFZ+.
Click on the empty space next to the "File" box, then browse to the directory containing your soundfonts in the window that appears. Select the soundfont you would like to load and click "Open." Click "Program" to change between individual instrument patches included in the soundfont in question.
Drag and drop a MIDI file onto the track and click "Play" on the DAW transport to hear your soundfont in action.
Download bs-0 and launch the installer. When prompted for a location, choose your DAW's default directory for AU plugins.
Launch your digital audio workstation of choice and create a new track. Then launch the plugin loader for the track in question and choose bs-0.
Click "File," then "Open" in the bs-0 dialog box that appears. Browse to the directory containing your soundfonts and choose one to load. If the soundfont contains multiple banks, click "Bank (MSB/LSB)" to change between them.
Drag and drop a MIDI file onto the track and click "Play" on the DAW transport to hear the soundfont.