The digital revolution is here, and it's affected the music world in a big way. On today's stage, a simple iPad or MacBook can replace a whole rack's worth of analog audio equipment. Whether you're using GarageBand or another favorite music app, the best way to get the most out of your digital tools is to match them with the iOS devices that can take full advantage of the features they have to offer.MIDI controllers are a big part of that. If you're using Apple devices in a studio environment, a controller designed specifically for that device is definitely something you'll want in your toolbox. Just like any MIDI controllers, those made for iOS gadgets come in a few different varieties, including pads and keyboards. These controllers are great for studio use as well as live performances.Speaking of live shows, there are iOS devices to keep you covered in this area, too. A DJ controller is a good example, giving you the intuitive control of the turntables to use together with the powerful features of your iOS DJ software. Hosting a party? How about a karaoke machine to connect to your iPad? You can even run a professional-level soundboard from your iPad or MacBook with a digital live sound mixer. There are options for every application from social to hobbyist to pro.If you need a portable way to play your iPod out loud or you want to use it in your sound system, check out some speakers and docks. Using the iPad as a sheet music display on stage? Keep it in view with a music stand adapter, and maybe even use a digital pedalboard to navigate the sheet music or to control virtual pedals when the iPad is connected as part of your signal path. Naturally, an audio or MIDI interface will help you out with making that connectionâ€”and you can provide your own vocals with an iOS mic, too.There really is a device for everything, which makes Apple's gadgets some of your best friends in the modern music scene. Stock up on the controllers, interfaces and tools you need to let the apps do the heavy lifting, and you'll wind up with a simpler arrangement that's easier and quicker to set up and tear downâ€”something that you'll be thankful for at the end of each gig on a demanding tour.