Eno and Chilvers developed Bloom together, and Trope is very similar to it. It's the same setup, where you tap your finger in different areas of the screen to create sounds that then loop and change over time. Trope uses more drones and pads than Bloom, however, so the music you'll get it quite different and, as the developers say, darker than Bloom. The visuals have also gotten a big bump up, offering much more variation in patterns and colors than Bloom.

Trope is $4 and you can get it from the App Store now. If you liked Bloom, you'll like this. [Trope (iTunes Link)]

It's called the ReedBox (named for the magnetic reed switches it employs), and it drives a number of different Processing "sketches" (little apps), which is the same software used to make many of the projects we saw on IAC's 120-foot screen last week. The one you see here is inspired by one of our favorite iPhone apps, Brian Eno and Peter Chilvers's Bloom—musical notes dependent on which grid points you place your magnets on loop and can be changed in real time.

Aside from this, there is a more traditional drum sequencer, a particle tracer (particles on the screen follow the points where the magnets are), a Flickr photo picker based on colors and a simple strategy game. The source code for it all is available on John's site: [John Kuiphoff's ReedBox - ITP Winter 2008]

Bloom: Highlight of the week here at Gizmodo HQ is Bloom, Brian Eno and Peter Chilver's generative music app in action above (crank up the sound!). Touch the screen and create instant loops in a Music For Airports piano style which will degenerate and evolve in real time. You can also watch it do its own thing, creating a generative loop that's always different. Because why shouldn't a few spare minutes in line or on the can be enhanced by improvisational iPhone-assisted ambient sketches? Take the pain away...for $4.

RjDj: In a similar vein and just released today is RjDj. It records sounds from your environment via the iPhone's mic and then processes them into a playback loop, adding delay and shifting pitch according to preset "scenes." The effect is really, really cool, even just walking around the house. An ice cream truck rolled by my open window and I almost fell over, just now. There's a free version with one scene, and a $3 version adds another processing scheme. Check out the video above for some serious beatboxing with RjDj—neat stuff. Thanks, Gaby!

i.TV: Your weekend needs a well-structured plan for backlit entertainments. And thankfully the value quotient is very high with the free i.TV, which is a nicely designed TV schedule app that does a lot. Aside from giving you a nice schedule grid, it also pulls descriptions, reviews and images from each show, YouTube trailers for any movie on TV, and allows you to bookmark individual shows, channels or genres to keep track of them individually. Oh, and it also finds nearby movie theaters for showtimes and trailers for current theater runs, too. Free.

iNietzsche: Your sensory deprivation hovel also needs Nietzsche, obviously. iNietzsche provides a random quotation from our favorite nihilist at varying levels of translation precision. Free.

CameraBag: And for when it's time to go back into the world, CameraBag. It's not new this week but I want to right the wrong of missing it by mentioning it here anyway, because it's very cool. There are a lot of cheap-o photo effects apps in the store, but CameraBag is the first I've seen to add unique effects from actual classic cameras/film types to your iPhone's pics. You can add the distinctive vignetting of a Holga, a nice Kodachrome color effect, and a few others. Sure you could do all of this in Photoshop too, but CameraBag is a one-stop shop. $3

This week's app coverage on Giz:
•A sneak peak at the forthcoming South Park iPhone app shows downloadable show clips, wallpapers, contact icons and looks generally great. No streaming episodes though, yet.

•A nifty trick blocks ads in mobile Safari, for jailbreak only.

•Those greedy sonsabitches at MLB.com are already selling next season's version of the MLB at Bat baseball news and stats app, because you're forced to buy the same app again for each new season.

•TouchType adds a highly desired feature—the ability to use the landscape keyboard for emails for 99 cents.

•iPhone OS 2.1 is caught scrimping on the email downloads while in sleep mode.

•And a peak into the innards of the iPhone software 2.2 beta reveals Street View for Google Maps, the ability to turn off auto-correct while typing and Japanese emoji icons.

This list is in no way definitive. If you've spotted a great app that hit the store this week, give us a heads up or, better yet, your firsthand impressions in the comments. And for even more apps: see our previous weekly roundups here, and check out our original iPhone App Review Marathon. Have a good weekend everybody.

Unlike most music-creation apps, it doesn't take an existing musical instrument and cram it awkwardly into the iPhone's interface. Instead, it creates a completely new "instrument" designed specifically for the iPhone. Essentially, you're provided with a colored screen and a quiet drone. As you tap the screen in various places, different tones play depending on where you tapped. They then loop, creating a unique piece of music on the fly, one that changes gradually on its own once you stop tapping.

You can also just let it create music on its own, coming up with a new, unique piece every time you run it. It's also beautiful, with the tones appearing as colored spots that slowly fade. It's as satisfying to actively play with as it is to let do its own thing.

Bloom is available on the App Store now for $3.99, and if you're a fan of ambient music or music in general, you'll be wanting to get it right now. [Bloom (iTunes link) via The Apple Blog; Thanks, Purns!]

[Design 21]