MusicMessages! is a collaborative step sequencer for the iMessage App Store (iPhone, iPad). Using the simple and (hopefully) intuitive interface, you can punch in a few chords or a percussion line and send the message off to your friends, who can then make their own changes and send it back. Five instrument layers and over 40 MIDI instruments are available to use. Bonus: if you have an iPhone 7, the note buttons respond to pressure and "pop" like bubble wrap with the help of the Taptic engine!
Composer's Sketchpad is an iPad sequencer-ish app for quickly jotting down musical ideas. In brief, the app presents you with a giant pannable and zoomable canvas that you can draw musical notes on. I wanted to create a modern take on sheet music, but without any of the legacy limitations; as a result, you can start each note at any time and bend it to any pitch, giving you the ability sketch out expressive solos and complex rhythms with no extra effort. (You can also turn on time or pitch snapping if you like.) Navigation, editing, and playback are carefully designed to be as frictionless as possible, and over 100 different instruments (as well as a percussion set) are available. Your music is saved automatically without any limit on the total number of sketches. Apple Pencil supported! [more inside]
A new app I wrote for the iPhone and iPod Touch to remotely control the MPD open-source networked music playing software, start/stop playback, edit the playlist, browse the music collection and queue up tracks for playing. (App Store link.) [more inside]
Chicago Avenue Moon is a generative music app that responds to date, time, lunar phase, GPS, etc, to determine how its music unfolds, in real-time. The iOS app manipulates, sequences, and layers 1000+ brief musical phrases to create trillions and trillions of variations, unique to the listeners movement and place on the planet. [more inside]
Samvada (currently free in the app store) turns your iPhone/iPad into a set of sympathetic strings, tuned to the notes of a raga. Designed for practicing and performing Indian Classical music, Samvada is also fun to use for everyone - it turns everything the microphone picks up into tuneful sound.
I have recently written a MIDI control surface app for the iPad. It currently has six layouts, consisting of combinations of piano keyboards (with pitch bender), and ribbons and XY pads, which can be configured to send different MIDI control events. It works over WiFi, talking to the open-source DSMIDIWiFi client. [more inside]