You have several options for stringed electric and electroacoustic instruments:
- Plug it to an amplifier.
- Use a 1/4" to USB instrument cable to connect it to PC/Mac.
- Use an audio interface.
- Use a standard 3.5mm adapter jack. This only works if your computer has a separate jack for mic and headphones (E.g. not on MacBook Air).
There are lots of audio interfaces available, and the right one for you depends on the device(s) you’re plugging into. Check out the following videos to see some options.
You can find piano set up instructions here.