From Giel Bremmers:
MultitrackStudio for iPad is an audio/MIDI multitrack recording app. It comes with many high quality audio effects including a guitar amp simulator. Both audio and MIDI tracks can be edited. MIDI editing features include pianoroll, drum and score editors. the straightforward user-interface has been designed with tape-based recording in mind. It's easy to use yet powerful. Key features: Up to 16 audio/MIDI tracks, audio tracks can be mono or stereo. Editors: audio, pianoroll, drum, score, MIDI controllers, timesig/tempo and song. One effect return section. One master section. Three effect slots per mixer section (two for MIDI tracks). Effects: Automated Fader, Chorus, Compressor, DeESSer, Echo, EQ, Flanger, Guitar Amp, Master Limiter, Noise Gate, Phaser, Reverb, Rotor, Saturator, Stereo Imager, Tremolo, Tuner and Vibrato. MIDI instruments: MultitrackStudio Instruments (General MIDI compatible), SoundFont Player, Matrix Sampler, up to four Virtual MIDI Apps and one CoreMIDI output device. Supports Audio Unit effects and instruments (iOS 9). Supports Inter-App Audio effects and instruments. Supports Audiobus (acts as output in Audiobus app). MIDI sources: onscreen keyboard (keyboard, chords, drum, matrix and various string layouts) and one CoreMIDI input device. Supports Bluetooth LE MIDI. Audio sample rate: 44.1 or 48 kHz. Imports. wav, aif, mp3, mid and various other audio file types. Exports. wav and. mid files. Import/export audio/MIDI via AudioShare, General Pasteboard, Document Picker, iTunes File Sharing or email. Imports/exports. zip file containing all files needed to open song, compatible with MultitrackStudio for Windows/OS X. the Pro Extension (available as in-app purchase) adds these features: Up to 32 tracks. Either an extra Effect Return or up to 8 Groups. Two extra Effect Returns on 12.9 inch iPads. Multichannel audio playback. Mixer and effect automation. Audio pitch shifting in track editors. Time stretching in track editors. Tempo editor can process audio tracks. Stretch and Stretch Accelerando in tempo editor. Multi MIDI Editor (edit multiple tracks in a single editor). Create new song using current as template. Convolutor effect with Vintage Reverbs. Load custom speaker IR in Guitar Amp. Dynamics effect, supports sidechaining. Multiband Compressor effect. Phase Inverter effect. Transposer effect. Vocal Tuner effect. Note: MultitrackStudio for iPad does NOT support Bluetooth audio devices. iPad 2, iPad 3 and first gen. iPad mini do not support Audio Units.