diff --git a/drum.SF2 b/drum.sf2
similarity index 100%
rename from drum.SF2
rename to drum.sf2
diff --git a/guito.SF2 b/guito.sf2
similarity index 100%
rename from guito.SF2
rename to guito.sf2
diff --git a/piano.SF2 b/piano.sf2
similarity index 100%
rename from piano.SF2
rename to piano.sf2
diff --git a/test.SF2 b/test.sf2
similarity index 100%
rename from test.SF2
rename to test.sf2