iOS Musician Apps (393) Supported Technologies is Audiobus, Type is Instrument

Ravenscroft Grand is a piano sampler.

RD4 - Groovebox is a music making app with virtual analog synthesizers, drum machines and effects.

Redshrike is a polyphonic synthesizer that combines a resonator designed to make more complicated sound creation and subtraction synthesis with an FM oscillator that creates violent distortion.

Standard Root Reggae drum samples recorded with a real kit that seamlessly loops these patterns together.

Mixvibes introduces the perfect remix toolbox: lay down samples on a grid of pads and tweak them in seconds.

Slice your audio samples with ReSlice and create flexible musical atoms which can be triggered by MIDI notes or the touch of your fingers.

Rhythm Lab is a comprehensive rhythm app that tests your skill and coordination.  There are four types of drills: single, double, drum, and drum kit.

Rhythm Pad includes a wide range of high-quality real and electronic drum kits.

Rhythm Pad includes a wide range of high-quality real and electronic drum kits.

Ribbons is an extraordinarily fun and expressive musical instrument for iPad.

Ripplemaker is a West Coast Flavored Modular Synth.

RMX-1000 for iPad is a tactile iPad app that lets you add high-quality FX to tracks in your iTunes library.

Turn your iPhone or iPad into a solid Rock Drummer with powerful drum sounds and tons of rhythms to get energetic drum grooves.

Roxsyn is a metamorphic guitar synthesizer.

S-Modular is a semi modular synthesizer for your iPad.

Sampletoy is a radical new musical instrument/plaything; part sampler, part granular synthesiser. Use it to capture sounds through the microphone, then play, loop, pitch and distort them live on the screen.

Samplist is a MIDI Sampler Instrument which allows you to easily chop a sample into different slices.

Samplr allows you to make music and play with sound in a new and intuitive way by touching the waveform on the screen with your fingers.

Make music like you’ve never seen: Draw lines, curves even squiggles to precisely input a note’s pitch and volume.

Scythe is a new iPad synthesizer that makes designing new sounds easier than ever before.