In addition, digital pianos have the benefit of having digital sound output. That makes it quite easy to record music just with a digital piano and a computer. And they never go out of tune. Typically, electronic pianos have a 1/4 inch stereo output. Since computers usually have a 1/8 inch stereo input, you'll probably need an adapter to connect up the two. But they are easily found at stores like Radio Shack.
After you have your electronic piano connected into the microphone port on your computer, you need software. There are countless software programs available that help you record your music. One free program is called Audacity, and it has lots of special effects and allows you to record multiple tracks. Audacity will allow you to adjust the keyboard volume by way of the software interface, or simply from your keyboard's volume control.
It's easy to start recording: just click on "record" and begin playing. When you're done, click on "stop." If you want to record more than one track, click "record" again and play along with the first track you recorded. You can also add other tracks to your song, like guitar, drums and vocals. Audacity's noise removal effect is very handy for cleaning up noise from recordings that go in through a microphone rather than directly into the computer like the keyboard does.
With a digital piano and the software program Audacity, you can create enough tracks to make up the sound of an entire band. If you want more different sounds for your keyboard, midi boxes and software can be used to add numerous extra voices, sounding like everything from bells to banjos.