I've been playing with CrossDJ for about a month now and feel I can give it a fair review. It is never easy to review DJ apps, since they are all trying to do the same things, but CrossDJ is doing those things quite well.
Unfortunately for all that it gets right, it is still a little lack luster. An important thing it lacks is recording!
There have been several odd synchronicities since I started covering the news. Previously the wildest was the Thursday two people wrote in with two different site suggestions that I had been planning on implementing, but had been putting off.
Before the Apocalypse in December, you can explore this app which is part generative music experiment and part album.
Developed by ambient pioneer Brian Eno and musician / software designer Peter Chilvers, Bloom explores uncharted territory in the realm of applications for the iPhone and iPod touch. Part instrument, part composition and part artwork, Bloom's innovative controls allow anyone to create elaborate patterns and unique melodies by simply tapping the screen. A generative music player takes over when Bloom is left idle, creating an infinite selection of compositions and their accompanying visualisations.
"Bloom is an endless music machine, a music box for the 21st century. You can play it, and you can watch it play itself." - Brian Eno
BeatSpiral is a Universal sample performance instrument from Xylio, makers of Future DJ.
We've seen a few sample slicer apps, but most stick to the conventional 16-step sequencers of hardware samplers. This looks pretty damn cool, using the touch interface to control the sequencer in a more dynamic way.
Chop samples, make beats and perform them live. Choose from the included library or import your own.
Create new sequences by rearranging and looping sample slices
Hold the wave stripes at different locations to play slices, slide out to record
2 Waves on the left get recorded to one track, the others to the second
Different loop regions on each track, change their length, copy and erase
Mute pads for temporary silencing, erasing track content and deactivating
Eject buttons for selecting sample files and setting volume and panning
User sample import via iTunes File Sharing (mp3, wav, aiff, m4a)
Animated metronome shows tempo controls (20-200 BPM) with Tap Tempo
Zoom, Undo and Rotate tracks
Audio engine featuring high quality interpolation and low latency
Sample library and handy user guide to get you started
Chen You has a 3 iPads, so he set them up end-to-end, to make an 81-Key iPad Piano. This seems like a very space efficient 81-key configuration. He also demonstrates why you want to turn multi-tasking gestures off if you're playing polyphonic keys.