iOS Musician Apps (35) Supported Technologies is Audiobus, Instrument Sounds is All-in-one

SK-51 is an all-in-one keyboard inspired by the Casio SK-1 (and his brother the SK-5), a 8-bit lo-fi keyboard from the 80’s, with sampling features and onboard drum machine.
Called the poor man's sampler at the time, this keyboard was a real instrument and has been used by many major artists such as Fatboy Slim, Portishead, Autechre and Nine Inch Nails.

Gestrument Pro takes everything we loved about Gestrument and improves on its original functionality while introducing a host of new features such as multi-touch, recordable automations, advanced scale editing and our unique system of highly tweakable modular generators that define the pitches and rhythms.

GarageBand is a DAW by Apple.

Easily build your own drum machine, soundboard or effect pad.

Requires Mogees Pro or Play vibration sensor, available from Mogees.co.uk. Mogees Keys allows you to you to play melodic arpeggios and chords through a simple application.

Compose and arrange short musical phrases through a process of play and discovery.

Chordbot is a songwriting tool / electronic backup band that lets you create and play complex chord progressions in different arrangements easily. Just add some chords, select a comping style and hit play.

Synthecaster fuses elements from guitars and keyboards into a full range polyphonic instrument that is intuitive, accommodates a wide variety of playing styles, and generates an even wider variety of sounds.

Load any MIDI file and sound library (a small General MIDI sound font is included). Play midi files with additional features.

Steps by Reactable is a small yet powerful MIDI sequencer that allows you to create complex rhythmic patterns in a surprising new way.

No time to delve into the big and serious music apps? PixiTracker is what you need! It is a simple and fun tool to quickly create musical sketches, chiptunes and sound experiments.

Modern take on the classic 8 step sequencer.

Protein Der Klang is a fresh musical sampler designed for public performances.

Navichord is a modern MIDI controller, working with software and hardware synths.

SoundPrism Electro is a musical instrument which makes it easy to come up with great chord progressions.

SoundPrism Link Edition is the newest incarnation of the award winning SoundPrism app. Link Edition integrates flawlessly into the new Ableton Link workflow with a totally redesigned sound engine that syncs with other Link enabled apps.

Meet Aimée, your personal, artificially intelligent built-in assistant composer, she's ready to help you compose great music, adding her vast knowledge about music theory to your creativity.

The Streetlytron '63 Edition : genuine Mellotronics for your iPhone and iPad.

Chordy 2 is a chord player app for music creators.