As far as recreating the Model 15 synth goes, the new app offers monophonic and 4-voice polyphonic operation with 160 built-in presets, a traditional Moog keyboard, 1150 ribbon controller and 8-step sequencing arpeggiator. What's more, the Animoog keyboard brings 22 built-in scales and polyphonic modulation to the mobile software, too. With the iPad's extra screen real estate, you can view two controllers at the same time, and yes, the app features 3D Touch support. There's full MIDI integration as well, so you can use those external controllers, even ones that connect via Bluetooth, to control the virtual Model 15 synth.

Because the Model 15 app uses Apple Metal, you'll need a 64-bit device that runs iOS 9.3.1 or higher to run it. This means owners of the iPhone 5s (and newer), iPod touch 6, iPad Air and iPad Pro can get in on the synth action. You'll also have to shell out $30 to download the app from iTunes. That may sound like a lot, but it's actually comparable to apps from other instrument makers. For example, Korg's take on the M1 synth for the iPad is priced at $20.