LaDiDa Demo from khush on Vimeo.

There’s no question iPhone/iPod touch development – really, just clever mobile development – has gotten a bit overhyped lately. But that’s all the more reason to do a round-up of genuinely interesting stories, real innovation happening on the platform. So, I’m clearing out my inbox with some of the more creative tools appearing recently on Apple’s mobile gadgets. There’s no better way to kick off today’s festivities than with this unusual “reverse karaoke” creation.

Sure, people may think they’re tone-deaf. But even the layperson has extraordinary powers of musical perception. So how could you train your iPhone to perceive and respond to music? That’s the question asked by LaDiDa for iPhone, the first of a new line of “intelligent” music applications for mobile devices. A “reverse karaoke” tool, the idea is to listen to singing and fake accompaniment, rather than having you sing along to canned backing tracks. Nothing is pre-programmed; everything is generated on the fly on the device.

It’ll even make up a Bollywood accompaniment to your singing:

LaDiDa Bollywood Duet from khush on Vimeo.

Of course, to me, it’s interesting not only what the iPhone is able to musically, but also what these algorithms are unable to make sound musical. Both reveal a whole lot about how we hear and conceptualize music. I think the team deserves real credit for making this fun, though, and on constrained hardware.

The app’s creator Khush follows in the footsteps of Smule in that it takes hard-core academic music research and uses mobile devices as a vessel for getting that tech in the hands (literally) of the general public. (See my interview with Smule founder and ChucK originator Dr. Ge Wang.)

Parag Chordia, developed at professor at the Georgia Institute of Technology and the gentleman you see in the video, spoke to CDM about what’s happening behind the scenes. He tells us about how this application was developed, and how the intelligent algorithms work (or at least try to work, as music analysis and auto-accompaniment remain at early stages).

First, an explanation of the app.

World Science Festival 2009: Bobby McFerrin Demonstrates the Power of the Pentatonic Scale from World Science Festival on Vimeo.

At the World Science Festival in June here in New York, specialists – including musical specialist Bobby McFerrin – gathered to ask what in music we humans hear universally, versus what is culturally specific.

Is our response to music hard-wired or culturally determined? Is the reaction to rhythm and melody universal or influenced by environment? Join host John Schaefer, Jamshed Barucha, scientist Daniel Levitin, Professor Lawrence Parsons and musical artist Bobby McFerrin for live performances and cross cultural demonstrations to illustrate music’s note-worthy interaction with the brain and our emotions.

You can watch a series of five video highlights, but the one above is perhaps the most striking. (I believe it’s already more than made the rounds around the Interwebs, but, well, we can say we were all busy creating digital music.)

Notes and Neurons videos

It’s funny just how low the average person’s opinion of their musical ability can be. Ask an average “non-musician,” and they’ll often claim to be deaf to rhythm and pitch. Push the issue, though, and typically you’ll discover quite the opposite. Listen as the crowd laughs at discovering they all share some basic intuition about how pitch works. These are, after all, science and neurology types, not musicians.

Footsteps from the abyss of total unawareness, musician and musicologist Clive Wearing has two lifelines: love and music. Suffering from an amnesia that robs him of nearly all memories beyond a few seconds, these bring him back from a waking death and become life and being itself:

“I picked up some music,” Deborah wrote, “and held it open for Clive to see. I started to sing one of the lines. He picked up the tenor lines and sang with me. A bar or so in, I suddenly realized what was happening. He could still read music. He was singing. His talk might be a jumble no one could understand but his brain was still capable of music. . . . When he got to the end of the line I hugged him and kissed him all over his face. . . . Clive could sit down at the organ and play with both hands on the keyboard, changing stops, and with his feet on the pedals, as if this were easier than riding a bicycle. Suddenly we had a place to be together, where we could create our own world away from the ward. Our friends came in to sing. I left a pile of music by the bed and visitors brought other pieces.”

Neurologist Oliver Sacks has offered insights into the mind and consciousness before; here, he gives us a glimpse from an extreme world of just how important our experience is in all our minds. And if this doesn’t make you want to practice — in fact, realize what a profound experience that practice is — nothing will.

A Neurologist’s Notebook: The Abyss – Music and amnesia. [The New Yorker]

Thanks, Wally, who adds: “music is about being in the present – that seemed to be the thrust of things, and it was beautiful to read how this man who lives only in the present, with no remembrance of what happened just moments ago, was able to build his life around that. Ironically, after reading that story, i thought to myself — I will always think of this story whenever i listen to music or work on music.”