These days, everyone and everything are more connected than ever, and that includes musical instruments and musicians. Many of today's digital pianos, keyboards, and electronic drum sets include some form of USB, Bluetooth, or Wi-Fi connection that enables connection to computers, tablets, and mobile phones. Some instruments even include the songs and exercises for popular lesson books built in. And even if your instrument doesn't offer one of these options, it's easier than ever to access downloadable and streaming lessons and tutorials. Here are just a handful of the great online and app-based lesson materials that are now available to help you learn music in the comfort of your own home, or wherever and whenever else it's convenient to take a moment and learn something new.