The iPhone has become an almost absurdly-popular platform for music apps this year, even given more capable, more plentiful PCs. But to those who don’t yet “get” the appeal, talk to a mobile music addict: having the ability to be creatively musically in corners of time that would otherwise go unused, like a cramped bus ride, can be a beautiful thing. (Now, you start talking about taking away my PC/Mac experience, and I will start screaming in agony – but that’s a topic for a separate post.) The question is, what form should that app take? Today, I’ve got an iPhone round-up going as I clear out my news inbox, but that thread lies beneath all the stories…

I’m working on putting together a collection of truly productive, non-gimmicky/non-toy music apps now that the platform is maturing. But two apps released this week I think deserve special mention, and mention together – partly because of the different angle they take.

They’re both essentially handheld grooveboxes. They’re both relatively powerful, bringing desktop-style production to the platform. They’re both good options, and at this price, you might go buy both. But as I go off to test these two apps, I’m already struck by the contrast between the two.

One is the kind of app that we’re seeing a whole lot of on the iPhone, just as we once saw it in me-too apps on desktop computers. It assumes that the way to reach more people is to give them a whole bunch of canned loops that already sound like the styles they might want to play, and assume they’ll be pretty limited in their ability to do much with those loops.

The other of the two apps eschews the obligatory audio loops for real synthesis, and strips out the usual “let’s try to look like hardware” interface for something a lot more minimal and (I think) touch device friendly. That’s a design lesson that might well be applied beyond the iPhone, too.

First, consider the looped audio approach.

DyNAmic sequencer from Lo-Fi Massahkah on Vimeo.

Ready for some musical genetic engineering?

Much of the sound of electronic music today grows out of the use – and abuse – of specific designs. The electronica beats bred in discos and techno, Detroit and Berlin have a direct lineage to analog step sequencers and the rigid precision of Roland’s early electronic devices. These designs create limitations to embrace and to oppose – just as music notation or theoretical convention did for composers for centuries.

Okay, that’s a lofty way to put it — the question here is, how do you re-engineer music, even an ounce at a time? If you’re a composer a few centuries ago, you make subtle changes to your craft, working inside a convention, and write that down. (Just as with electronic music, there is a layer of separation – only then, it was a piece of paper.) If you’re an electronic artist today, you can likewise change what you’re able to control, and how, playing live. The differences at first may be imperceptible, but just like learning an instrument, the long-term payoff can be huge.

I asked for examples of what people are doing with the Lemur multi-touch touchscreen controller and its recently updated V2 software. This isn’t just about the Lemur – it illustrates what’s possible when the musical device and the controller can flow freely out of a musician’s imagination. That could apply to hardware or software designs well beyond the Lemur.

Mikael Björk of Sweden responded with a terrific example, a “dynamic” sequencer available to all Lemur users via JazzMutant. The open-ended screen layout of the Lemur has allowed the creator to provide all kinds of unusual control over morphing beats, with your fingertips manipulating simulated physics as beats twist around you. It’s not just electronica and sampling and DJing, either – he also has an incredible clip working with a very talented vocalist. It sounds markedly different from the more conventional, Loopstation-style loop performance.

Slicing, remixing, looping, "live performance-oriented features" … this is Digidesign we’re talking about, right? Digi’s Advanced Instrument Research (A.I.R.) unit, the fruits of the acquisition of Wizoo, may have a pretentious name, but they’ve been doing some pretty great work on new instruments. The new project, Transfuser, will have to enter some crowded waters. Loop slicing and handling already works pretty nicely in Ableton Live (especially with Live 7’s drum racks), in instrument form in FL Studio 8’s awesome Edison and Slicex, and in tools like fxpansion’s GURU. (Superficially, at least, Transfuser bears more than a passing resemblance to the latter in its overall UI layout. And then there’s the fact that the knobs look like they were lifted directly from Live.)

Of course, Transfuser isn’t for FL Studio users. As with previous AIR releases, the Digi-owned Wizoo now make plug-ins for Pro Tools only. And if you are a Pro Tools user, you don’t have to listen to me or try to squint at the screenshots: you can take Transfuser for a test drive free. Download the plug-in for Pro Tools (LE/HD/M-Powered) before June 25, and it’ll operate for three months, no restrictions.

Transfuser Preview [Digidesign]

I can already see from these shots that this isn’t quite the way I’d want to work, personally, let alone enticing enough to make me deal with Pro Tools as a host. But "groove-making" is different for different people, so I’d be very eager to hear what someone else thinks. If you’d like to write up a mini-review for CDM, let us know.

The DS’ stylus and touchscreen make an ideal pocket-able interface: they’re coupled with friendly, conventional arcade buttons, but provide precise control of visual interfaces without using a mouse. (Touch with fingertips is not nearly as accurate, especially on tiny screens.) That’s already inspired quite a bit of music software, but GrooveStep earns extra points for employing a friendly interface for easy, quick pattern sequencing.