My Focusrite Scarlet audio interface really doesn't like it when software doesn't play nicely with other software. It is ideal to have sample rate and hardware buffer size the same across all software running. Unfortunately, Finale does not allow HW buffer sizes below [I think it's] 512. This means that when you're using Finale sounds to compose live, the latency is BAAAAAAAD. It also makes playback sound horrible when my Scarlet is set to 256 or lower.
Lower HW buffer sizes in addition to the higher ones.
We'll get this 64-bit version functional! I have faith!