Do It Like a DJ
Posted 08/21/2007 at 5:45pm
| by Eugene Robinson
WHAT YOU NEED
> iTunes
> Algoriddm djay 1.2 free
> Potion Factory Tangerine 0.9.2 beta free, optional
> Audio Hijack Pro $32, optional
1. Drag-n-DJ
Launch djay 1.2. All of your iTunes tunes will be automatically listed in the native play list. Djay provides the standard features of any good DJ set up: a mixer for increasing the aural presence of one song over another in playback, dual equalizers, pitch, and tempo sliders for adjusting the sonic character of your songs, cue points for moving from points of one song to another, as well automation for when you’re ready to try crossfading (moving between two recorded songs). If you were thinking ahead, you’ve already listed your beats-per-minute (BPM) in your iTunes library. And if you didn’t know this already, being able to match the BPM rate will let you weave different songs with different tempos together while maintaining an entertaining consistency in your mix (translation: slowing down “YMCA” so that it segues into the slower and more down tempo “Feelings”). If you haven’t done this, djay 1.2 can do it for you automatically with a click on the Sync button along the bottom of the app window.

However, since we found djay 1.2’s native BPM feature to be a little slower than desired (a definite caution for live mixing), and many of us get paranoid about having all of our DJ eggs in one app basket anyway, there’s some cool freeware that you can use instead. Potion Factory’s Tangerine 0.9.2 beta on a 1.83GHz Core Duo iMac can BPM-analyze three songs a second in your iTunes library, which sets you up quite nicely to start beat-matching and even scratching, if it suits you. (Scratching, de rigeur in lots of hip-hop based DJ sets, used to be done by dragging the turntable needle across the vinyl. But that can all be done right here.) You want to avoid sudden volume peaks and strive for a barely noticeable sense of one song moving to the next. In iTunes, there’s also a Sound Check feature that does exactly the same thing, optimizing track volume for smoothness (the Join Tracks feature does sort of the same thing when you’re importing music).