The iPhone, iPod Touch and iPad are now established favorites for the mobile muso with new synths and sequencers seemingly coming out every week. Until iOS 4 however there was no standardized method for getting MIDI control signals in and out of the units for interfacing with ‘proper’ equipment. Some enterprising developers created methods using the Apple Camera Kit USB connector whilst Line 6 created its own proprietary method and the MIDI Mobilizer dongle to go with it. In the iOS 4 software release Apple ported the CoreMIDI programming interface framework from MacOS and developers finally had a standard method with which they were familiar. Though iOS4 was released a year ago, compatible MIDI interfaces are now only beginning to get to market.