anyone know of a free visualizer app like the itunes visualizer where the lines or smoke or something changes with the music
Doesn't work that way with the iPhone. Apple doesn't allow the device to analyze the music being played, so there's no way to do a visualizer yet unless you're doing it like Beatrider's upload system.
That's only accessing the library, not able to use the music. Apps now can allow you to play your music within it, but that's the limit.
As much as I'd love to see it, I wouldn't expect it anytime soon -- if ever. Analyzing the music means having access to realtime wave data, and if you can access the waveforms, you could potentially create an app that records the music digitally, effectively letting you copy it for whatever purpose, and Apple ain't gonna allow that. It would be nice if they could build an API for the SDK that provides an abstracted layer of audio analysis though. At least that way the user could get some realtime data from the music without accessing the music directly. That would make developers and Apple both happy. Of course, I've also been waiting for Apple to make a real 5 or 10 band EQ for ages now, instead of the crappy presets, but I don't see that happening any time soon, either.
Check out Energy Energy (shameless plug) is the closest thing you will get to a visualizer. Its an interactive music player but you can just let it do its thing as your iphone or ipod touch is docked (doesn't have to be docked but its a 3d graphics app and does take some battery charge) It can be found here http://itunes.apple.com/WebObjects/MZStore.woa/wa/viewSoftware?id=305373918&mt=8 Youtube video of it can be found here http://www.youtube.com/watch?v=DzshLtL2wBE Its only $0.99USD - Matt
I use spawn illuminati, it has a mic mode that reacts to the music suprisingly well, and they are talking about adding in the direct music support now that 3.0 is out - http://appshopper.com/entertainment/spawn another decent visualizer would be trippin - http://appshopper.com/entertainment/trippin I use both on occasion while plugged in and listening to music, better then just having the album art...
It doesn't react to the music though. It only displays a passive visualizer. Also, those screenshots (really just the same one with different colour overlays) don't do it any favours, either. For $2 I'd expect a lot more out of a passive, single-effect graphic demo.
There isn't a true visualizer in the app store yet because Apple doesn't allow the device to analyze the music being played... So any visualizer in the app store now wouldn't follow the music rhythm/beat or whatever.
iOS4 I'm going to gravedig this thread up for the arrival of iOS4 (I know it came out months ago). Anyway, if games like Tapic can use the ipod music library, is there any possibility that we will see something like G-Force able to use the music library? I have heard about iSeeMusic, anyone have that to confirm?