[Flash8, MX04, or MX, any is fine]Volume Control! Plz Help!

I know how to do a volume slider, but I was wondering if it were possible to make like a few lines of code or something where when you got to that frame, the audio that is playings volume would go down or up, or if become a specific percent like 50% volume or whatnot. Is that possible? If it is, could someone plz help me with it? Thanks in advance!
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