Uploaded December 2015 | Updated September 2026, 3 hours ago

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the alert sound is actually louder, luckily trap15 found a way to hex edit the ROM to reduce the volume

shmups.system11.org/viewtopic.php?p=1099916#p1099916

Compare it with the regular volume:
youtu.be/6gUE1faQSl4?t=12