Add a 4-bar ROCK FRETLESS BASS track in the following composition:
PIECE_START TIME_SIGNATURE=4_4 GENRE=ROCK KEY=C# BPM=80 CP=C#_Dmaj7_E BARLENGTH=4 INSTLIST=68_53_53_36_32_3_29_16_18_24_24 TRACK_START INST=68 DENSITY=0 BAR_START TIME_DELTA=14.0 NOTE_ON=70 NOTE_ON=66 TIME_DELTA=2.0 NOTE_OFF=70 NOTE_OFF=66 BAR_END BAR_START NOTE_ON=70 NOTE_ON=66 TIME_DELTA=14.0 NOTE_OFF=70 NOTE_OFF=66 NOTE_ON=71 NOTE_ON=68 TIME_DELTA=2.0 NOTE_OFF=71 NOTE_OFF=68 BAR_END BAR_START NOTE_ON=71 NOTE_ON=68 TIME_DELTA=14.0 NOTE_OFF=71 NOTE_OFF=68 NOTE_ON=69 TIME_DELTA=2.0 NOTE_OFF=69 BAR_END BAR_START NOTE_ON=68 TIME_DELTA=2.0 NOTE_OFF=68 NOTE_ON=68 TIME_DELTA=8.0 NOTE_OFF=68 TIME_DELTA=2.0 NOTE_ON=71 TIME_DELTA=4.0 NOTE_OFF=71 BAR_END TRACK_END TRACK_START INST=29 DENSITY=3 BAR_START NOTE_ON=68 NOTE_ON=68 TIME_DELTA=2.0 NOTE_OFF=68 NOTE_OFF=68 NOTE_ON=71 NOTE_ON=71 TIME_DELTA=4.0 NOTE_OFF=71 NOTE_OFF=71 NOTE_ON=75 NOTE_ON=75 TIME_DELTA=2.0 NOTE_OFF=75 NOTE_OFF=75 NOTE_ON=70 NOTE_ON=70 TIME_DELTA=4.0 NOTE_OFF=70 NOTE_OFF=70 NOTE_ON=68 NOTE_ON=68 TIME_DELTA=2.0 NOTE_OFF=68 NOTE_OFF=68 BAR_END BAR_START NOTE_ON=75 NOTE_ON=68 TIME_DELTA=2.0 NOTE_OFF=75 NOTE_OFF=68 NOTE_ON=71 NOTE_ON=71 TIME_DELTA=4.0 NOTE_OFF=71 NOTE_OFF=71 NOTE_ON=75 NOTE_ON=75 TIME_DELTA=2.0 NOTE_OFF=75 NOTE_OFF=75 NOTE_ON=70 NOTE_ON=70 TIME_DELTA=4.0 NOTE_OFF=70 NOTE_OFF=70 NOTE_ON=68 NOTE_ON=68 TIME_DELTA=2.0 NOTE_OFF=68 NOTE_OFF=68 BAR_END BAR_START NOTE_ON=68 NOTE_ON=68 TIME_DELTA=2.0 NOTE_OFF=68 NOTE_OFF=68 NOTE_ON=71 NOTE_ON=71 TIME_DELTA=4.0 NOTE_OFF=71 NOTE_OFF=71 NOTE_ON=75 NOTE_ON=75 TIME_DELTA=2.0 NOTE_OFF=75 NOTE_OFF=75 NOTE_ON=68 NOTE_ON=68 TIME_DELTA=2.0 NOTE_OFF=68 NOTE_OFF=68 NOTE_ON=77 NOTE_ON=77 TIME_DELTA=2.0 NOTE_OFF=77 NOTE_OFF=77 NOTE_ON=68 NOTE_ON=68 TIME_DELTA=1.0 NOTE_OFF=68 NOTE_OFF=68 NOTE_ON=69 NOTE_ON=70 TIME_DELTA=1.0 NOTE_OFF=70 NOTE_ON=78 NOTE_ON=78 NOTE_ON=78 TIME_DELTA=2.0 NOTE_OFF=69 NOTE_OFF=78 NOTE_OFF=78 NOTE_OFF=78 BAR_END BAR_START NOTE_ON=69 NOTE_ON=78 NOTE_ON=78 NOTE_ON=78 TIME_DELTA=4.0 NOTE_OFF=78 NOTE_OFF=78 NOTE_ON=78 NOTE_ON=78 TIME_DELTA=2.0 NOTE_OFF=78 NOTE_OFF=78 NOTE_ON=78 NOTE_ON=78 TIME_DELTA=4.0 NOTE_OFF=78 NOTE_OFF=78 NOTE_ON=78 NOTE_ON=78 TIME_DELTA=4.0 NOTE_OFF=69 NOTE_OFF=78 NOTE_OFF=78 NOTE_OFF=78 NOTE_ON=78 NOTE_ON=78 TIME_DELTA=2.0 NOTE_OFF=78 NOTE_OFF=78 BAR_END TRACK_END TRACK_START INST=16 DENSITY=0 BAR_START BAR_END BAR_START BAR_END BAR_START BAR_END BAR_START BAR_END TRACK_END TRACK_START INST=53 DENSITY=0 BAR_START BAR_END TRACK_END PIECE_END
TRACK_START INST=36 DENSITY=0 BAR_START BAR_END BAR_START BAR_END BAR_START TIME_DELTA=14.0 NOTE_ON=38 TIME_DELTA=2.0 NOTE_OFF=38 BAR_END BAR_START NOTE_ON=38 TIME_DELTA=2.0 NOTE_OFF=38 NOTE_ON=38 TIME_DELTA=4.0 NOTE_OFF=38 NOTE_ON=38 TIME_DELTA=2.0 NOTE_OFF=38 NOTE_ON=38 TIME_DELTA=2.0 NOTE_OFF=38 NOTE_ON=38 TIME_DELTA=4.0 NOTE_OFF=38 NOTE_ON=40 TIME_DELTA=2.0 NOTE_OFF=40 BAR_END TRACK_END