Limitations of the iPod for DJing
The iPod is an MP3 player, so its not designed to work as a DJ unit, and as such there are limitations. Now many of the new DJ units that take advantage of the iPod such as the Cortex D-mix 300 or the Numark iDJ2 address the shortcomings presented by the iPod.
The main two limitations to the iPod from a DJing perspective are:
1. a lack of pitch altering- this means that track pitch can’t be altered, meaning that on an iPod the speed of a music track can’t be edited, which for a DJ means that you can’t beatmatch accurately.
2. there is no way to scratch music tracks on an iPod, something some DJs see as a necessity.
These flaws greatly affect the performance and usability of the iPod as a DJ tool, in reality its shows that iPod DJing is merely at the beginning stages, just like CD players once were, and natrually as the attraction of DJing with an iPod grows so will the functionality provided by the iPod and its software, indeed this is already happening when you consider the Pacemaker, and if that proves to be popular, it will only be a matter of time before the iPod becomes a truly portable Dj unit. In the mean time there are work arounds to allow you to DJ with an iPod now, check them out here and here.