I installed Quicktime 7, but when I try to play the video in lesson 12 the video disappears immediately after popping up. How can I fix this? (Windows 10)

Also got a frozen state just staying on lesson 7 page I had no issues with playing videos Windows 11 22581.200 Kawai ES110 Different variations of instrument setup don't change anything

I get every kind of feedback on my keys (such as finger tracking and such), EXCEPT for actual sound. It's an Alesis V61. Can anyone help me on this?

I saw this software recommended for learning piano but there's no option to buy / download it (I can't even see the price). All I'm able to do is add it to my wishlist and follow/ignore it. Does anyone know the reason for this?

Hi. I have a Roland Lucina AX 09 Keyboard which works as a midi controller too. Will it work for this program? I can use headphone in either the computer or the keyboard. If not, how many keys do you recommend the midi controller should have? Thank you for reading...