this is not the first DAW, since beside Auria there are others, but this one might be interesting to all Cubase / Steinberg users – (there has been a recent update to Cubase 7) and on the iPad this one looks tempting..
for an app it is expensive as hell (45€), so is Auria, but note, if you want to import something to Cubase you need to be very very up to date on your Mac or PC..
• Unlimited audio and MIDI tracks (depends on the device used)
• Over 70 virtual instrument sounds based on HALion Sonic
• MixConsole with over 10 effect processors
• Over 300 MIDI and audio loops
• Virtual keyboard and virtual drum pads
• Sample Editor and Key Editor
• Export projects to Cubase, Dropbox, SoundCloud, AudioCopy and email
• Core Audio and Core MIDI compatible hardware supported
• Sequence other CoreMIDI apps (MIDI recording only) and run Cubasis simultaneously via background audio
• Audio import from iTunes music library, AudioPaste, Wi-Fi server and iTunes file sharing
• Audio mixdown and MIDI export
48 voices: iPad 2, iPad mini
64 voices: iPad 3, iPad 4
Project export to Cubase requires Cubase 7/6.5, Cubase Artist 7/6.5, Cubase LE AI Elements 6 or higher