song global volume and mixer volume

s3m2taud.py

@@ -843,6 +843,8 @@ def assemble_taud(h: S3MHeader, instruments: list, patterns: list) -> bytes:
         flags_byte=flags_byte,
         pat_bin_comp_size=len(pat_comp),
         cue_sheet_comp_size=len(cue_comp),
+        global_vol=0xFF,
+        mixing_vol=0xFF,
     )
     assert len(song_table) == TAUD_SONG_ENTRY