My results with LaDiDa worked best when I sang original songs--be it improvised words about pants or, if I had more talent and inspiration, actual lyrics an aspiring songwriter might pen. LaDiDa did a pretty good job adjusting the background music and beat to my crooning. The finished product was less satisfying when I tried to sing actual songs; the accompanying music didn't quite match the singing, and the end result was fairly cacophonous. (LaDiDa does feature an a capella mode, which would be useful in those kinds of situations.)

In addition to A Capella, LaDiDa ships with three other musical styles. You can buy Guitar Style and Rap Style packs of additional background music as in-app purchases. In what I'm pretty sure is a bug with the current version, though, I was able to record and share songs using styles from packs I hadn't purchased--my masterwork "Pants!" is just such a track. One of my colleagues was also able to create songs with unpurchased styles. I imagine the developer will fix this apparent flaw by the time it takes you to read this sentence.

Version 1.5 of LaDiDa actually features a lot of these kinds of quirks. Normally, when you tap on the musical styles, you'll hear a sample to give you a flavor of what kind of background music to expect. On occasion, though, the only thing I heard was the sound of silence; tapping around usually fixed the problem. In other performance bugs, the recording countdown screen would periodically speed up to a breakneck pace--the tempo usually slowed back down once the recording began.

These performance burps aside, LaDiDa is an app that produces some pretty pleasing musical results. An ability to share your finished work via Twitter, Facebook, email, and LaDiDa's own music library only adds to the fun. I wouldn't go so far as to say you're producing your very own music with this app, but LaDiDa certainly fulfills the goal spelled out by Khush's Gupta when she talks about "bringing the joy of music creation to people who don't consider themselves musicians."

But does Songify deliver on that promise? Like LaDiDa, this new app features pitch correction and builds a melody around your input. The difference here is you're speaking, not singing. The concept is inspired by The Gregory Brothers, whom you may recognize from such auto-tuned YouTube sensations as and . Indeed, Khush developed Songify with the Gregory Brothers, who contribute a few musical styles to the finished app. Songify claims to use artificial intelligence and speech recognition technology to turn your words into a Gregory Brothers-style sensation.