I've been working on guitar gently weeps and having much trouble and remembered I had a Tascam CD guitar trainer. I just Tried it this morning and I think it's going to be a huge help with the Jake songs. It can drop the tempo all the way down to 50% and anywhere between without changing the key. It's going to be a huge help for me and thought I would mention it if others are having trouble with it like me and want some help. Seems like I paid about $125 for it a few years ago.