There are programs that will, with a mic added, help you tune an instrument. Even without a mic, they will play tones. For guitars, etc., there are chord charts available.

When learning songs, there are programs that will allow you to designate 'A' & 'B' points and keep repeating everything between them.


But maybe best of all, if a laptop is connected to the desktop computer by wireless router, it is possible to lean back in a comfy chair and either play music from there, or surf places like YouTube and play stuff recommended here at Mudcat.