Honestly, I've been shocked (as someone who likes hardware) by how large of a part of my workflow the iPad has become since I got it; I was never really enamored of VSTs, either (no moral objections or anything, just didn't click with the workflow), but view the iPad as being a sort of half-hardware half-software swiss army knife, which often proves invaluable to me. I don't even try to create full tracks on it - people do, but I'll admit that I find working in DAW type settings in iOS to be pretty fiddly and annoying (though it certainly can be done, and done well), but these are the uses (and some of the apps) I find most compelling:
The finest small format, affordable sample mangling/granular synthesis hardware ever made:
Samplr: The reason I got an iPad, and an endless delight; the starting point for dozens of my most recent tracks. Genius use of touch surface, and still probably my favorite way to take bitlets of sound and make them into something new - yes, it has limitations, but so does an SP-1200, and like with many classic pieces of hardware, it's limitations are often a source of inspiration. A complete musical instrument.
iDensity/iPulsaret: My two favorite granular synthesis tools anywhere; iDensity allows for layering up to four looping tracks of granular goodness, and can be used to create beautiful ever-changing soundscapes or squalling noise. iPulsaret allows for chromatic/keyboard based playing, and is great for turning snippets of sound into bizarre/unearthly pads.
Borderlands: I use it less than many, but another intuitive and lovely granular synthesis app.
Sektor: Stochastic sample slicing and mangling, intuitive, pretty, fun, and midi slaveable.
As a chameleonic single voice 'synth module':
Tera Synth: (NOT 'microtera'!) 'modular' synthesis, polyphonic or mono, nice effects, some of the (IMO) best/most vibrant/'analog-ish' oscillators in iOS, plus a formant filter, waveguide synthesis, simple FM, and very flexible/weird/good sounding FX.
iSEM: Very nice emulation of the Oberheim SEM - not gonna beat it in a head to head competition (duh) but still very good sounding; great midrangy sounds, takes to external FX well.
FM4: Clean, simple, elegant, good-sounding emulation of yamaha 4op FM machines (including emulation of the aliasing/noise on some of the classic hardware, if you want to turn it on): replaces my TX81z pretty damn impressively.
Poseidon: Really entertainingly weird spectral/wavetable synthesis; bright, buzzy, flexible and good sounding (waldorfian) drive options, plus very nice and easily pushed-to-the-limit FX and morphing filters ala the Emu zplane stuff. Shit loads of fun.
(there are TONS of other synth apps, but they aren't my main focus; plenty of other good shit i haven't mentioned though)
As a flexible/odd MIDI controller, sequencer, arpeggiator:
Lemur/Touchable: Provide a wide variety of ways to interact with synths or software as infintely customizable control surfaces
TC data: super deep and interesting program allowing for a wide range of touch-surface specific and expressive playing techniques
xynthesizr: fantastic polyphonic arp/step sequencer
chordion: turns the ipad into a sort of pseudo omnichord, great for messing with various chord progressions/voicings
Fun, flexible, FX unit:
No, it's not going to beat out an Eventide when it comes to detailed, complex reverbs, nor will it out-filter an analog low pass or whatever, but there are a lot of useful, interesting one-at-a-time FX apps: Audioreverb, the whole AUFX lineup but AUFX dub in particular, weirder shit like
Muckraker (far out/freaky distortion, and free),
Flection (waveshaping),
CSSpectral (resonator, waveguide reverb, granular delay, spectral resynthesis, etc etc) all get plenty of use from me. And though I use them less, some multi-FX apps (Flux:FX and - less effectively IMO - Turnado, Effectrix, or DFX) aren't going to replace super high end competitors but can certainly give any Kaoss Pad a run for its money.
Hope that wasn't too overwhelming: just sometimes feel the need to proselytize for the damn thing as someone who knows the limitations of the software/hardware (sometimes the Audiobus Forum can be a little too credulous as far as 'this thing can replace all hardware!' type posts go) but still loves the shit out of it. I mean, what OTHER granular synth can I bring with me on the fuckin' bus, and actually get productive work done with?
