iOS Musician Apps (207) Instrument Sounds is Keyboards

Elsa is a retro style sampling keyboard with tempo based looping.

DXi is a FM synthesizer application inspired by 80's most popular FM synthesizer.

DRC is a virtual analog polyphonic synthesizer that recreates the characteristic sound of an analog synthesizer.

A port of Dexed, an FM Synthesizer.

The sound generator inside the synthesizer is producing the exact wave form as the one you have created.

Unique synth with AUV3 (Audio Unit) and midi keyboard support. You can touch and change the wave and hear the difference.

Dagger is an analog modeling paraphonic synth with a big, raw analog sound.

This app reproduces the functionality of Casio’s best-selling CZ-series models, such as the CZ-101 (first released in 1984), and also includes new functions.

Specific sound morphing capabilities enables you to easily create complex evolving sound scapes, vocal phrases or stunning rhythms simply by choosing up to four sound sources from a predefined set.

Cube Synth is a groundbreaking new software instrument giving you the power and flexibility of additive synthesis together with easy editing and morphing capabilities.

Crystal Synth XT is a full featured semi-modular synthesizer, ideally suited to creating lush evolving soundscapes.

Continua is a three-oscillator / dual-filter six-voice virtual analog synth, with fully polyphonic modulation sources and built-in custom-designed effects, for everything from complex, evolving chill-out soundscapes to New Wave synth stabs.

Combo Organ Model V is a musical keyboard app for iPad/iPhone/iPod touch that simulates the electric transistor organ, is called a Combo Organ. It was a big success in the 1960s.

Colossus Piano sets a new standard in terms of realism, detail and overall quality of piano sounds on your iPad, iPhone and iPod touch.

The second best sounding piano app in the App Store (after "Colossus Piano")!

Chiptunes Pro lets you make retro music the way it should be made - with chips. Build your circuit to lay down drum beats, basslines, and tunes.  No knowledge of electronics needed.

CHAiOS SYNTH 2 is a synthesizer/melody generator that creates unique melodies with just one tap.

Caustic 3 is a music creation tool inspired by rack-mount synthesizer/sampler rigs.

Branches is a semi-modular synthesizer inspired by classics of the past. It runs both as a standalone instrument with support for external MIDI input or as a plugin (AUv3) in your favorite DAW app.

Borderlands Granular uses a technique called granular synthesis, which involves the superposition of tiny fragments of sound, or “grains," to create complex, evolving timbres and textures.