I've used a number of different software applications for music, and I don't know of any that will have a resolution of less than a whole beat.

I've played classical, rock, blues, salsa, pop, country, and a number of different styles of music and never played any peace at any tempo with a half beat per minute.

How did you come up with 88.5BPM?

Is it possible to change the vocal track with Audacity or another program?

Sorry I can't help more than this.

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