Fix [#36423] Audio strips contain selectable (visual) blend modes and opacity value

Simply hide blend type and opacity for SOUND strips!

release/scripts/startup/bl_ui/space_sequencer.py

@@ -407,6 +407,7 @@ class SEQUENCER_PT_edit(SequencerButtonsPanel, Panel):
         split.label(text="Type:")
         split.prop(strip, "type", text="")
 
+        if strip.type not in {'SOUND'}:
             split = layout.split(percentage=0.3)
             split.label(text="Blend:")
             split.prop(strip, "blend_type", text="")