links for 2010-08-07

You’ve decided that you want to downgrade the iOS software on your iPhone or other iOS device. Depending upon the particular device you own and iOS version you are running, your ability to do a downgrade can vary from slightly tricky to virtually impossible. This is because Apple has done its best to prevent downgrading.

Montreal band develop album art in the digital age, providing bonus material to accompany the download of their latest LP. "The idea is simple… Tightly sync a series of images with specific moments in a song using the m4a format. Like some podcasters do, but with micro chapters for each lines of the lyrics. In addition to that, we were able to add good old hyperlinks also synchronised to the song. This gives the possibility for the band to add, at any moments, all kinds of references related to each song. They plan to change and update those links occasionally."

This post describes some techniques that may help you optimize your PNG-images. These techniques are derived from laborious hours spent on studying how exactly the PNG encoder saves data. We’ll start with some essentials about the PNG format and will then move to advanced optimization techniques.