This is all about your computer. I tried looking up up AMD A8 64D and it's not listed. You have to be accurate with descriptions or we can't help you. I did see that there is a very long list of various AMD A8 processors going back to 2011. That means it's not AMD's newer line of Ryzen chips that came out a few years ago.

As for starting playback then quickly stopping and starting again at another bar. When you check the Fast Generation box you're telling Biab you have a fast system that can handle it. I'm 99% certain you don't. Whats happeneng with that box checked is Biab starts playback before it's finished generating meaning the song is playung but it's still generating in the background. If you stop playback in the first few bars you interrupted that process then if you start again quickly Biab has to stop the generation process then start over so it looks like it's not responding.

Yes, an i7 with 16 gigs of RAM makes all the difference. That's what I'm running but it's not the latest, it's about 5 years old now. Although a current 8th gen i5 is pretty strong too.

An SSD is critical as well. The only new systems running a spinning hard drive now are the cheapies.

Midi is completely dependent on what synth you have. The good ones start at several hundred bucks going up to thousands. PG gives us the free Coyote Wavetable and Sfzorndo just so we can hear some sound with a midi style but the quality is not the best. You can load better soundbanks into Sfzorndo but that's another discussion.

Bob

Biab/RB latest build, Win 11 Pro, Ryzen 5 5600 G, 512 Gig SSD, 16 Gigs Ram, Steinberg UR22 MkII, Roland Sonic Cell, Kurzweil PC3, Hammond SK1, Korg PA3XPro, Garritan JABB, Hypercanvas, Sampletank 3, more.