Trap Studio (US$2.99) is a music creation app that includes more than 350 samples created by Prime Loops. Along with that, the app features dual Oxford Synthesizer Company (OSC) Synthesizers, and you can import samples and apply many effects to them to create a unique sound. Sounds from Prime Loops have been featured in chart-topping tracks from artists such as Skrillex, Lady Gaga, Beyonce, and Grammy Award winning producers including RedOne & DJ Frank E.
Samples are categorized as Drums, Bass, Synth and SFX, and you can apply effects like distortion, echo, flanger and more to your samples as well. There is a virtual keyboard so you can enter your own compositions. Use your iOS device built-in microphone to add vocals or other audio, and then saved tracks can be uploaded to SoundCloud or shared via email, Facebook, Twitter, Tumblr and Foursquare. Files are saved in uncompressed .wav format and Trap Studio includes complete documentation.
I tried creating some background tracks and it was pretty easy to do even without looking at the help files. You can overlay tracks, of course, and edit their in and out time. I was able to save a project and come back to it later for additional work without any glitches.
Trap music originated in the early 2000s from Southern hip hop. More recently, music producers have re-energized the genre by putting elements of Trap into their music.
There is an amazing amount of useful technology crammed into Trap Studio. It's a testament to how far iOS has come and how useful iOS devices are as solid content creation platforms. Putting a Digital Audio Workstation on a phone would have have been unthinkable just a few years ago.
Trap Studio is reasonably priced, and was solid in my testing. My music skills never got much beyond playing the trumpet in high school and college band and orchestra, but Trap Studio is easy to use and powerful.
For those who need to create, Trap Studio is an inexpensive purchase. In the hands of a good musician, it's a powerful tool. The Trap Studio website has more info and some demo videos and songs.
Trap Studio requires iOS 7 or later, and it is optimized for the iPhone 5.