Line 6 has introduced Mobile In, a new digital audio interface and mobile POD guitar tone app for iOS that lets you turn your mobile device into a portable multi-effect processors.

The new Mobile POD app brings Line 6 tone and technology to its most portable level. The free app includes generous collections of 64 models of modern, vintage and boutique guitar gear including amps, cabinets, stompboxes and rack effects. Users can mix and match the fully adjustable models to build a virtually unlimited variety of tones, which can then be saved as presets.

Also included with the app, free of any in-app purchase, are over 10,000 hand-crafted presets created by artists, Line 6 and other guitar players.

Unlike competing analog adaptors that plug into an iOS device’s headphone jack, Mobile In digital input plugs into the 30-pin connector on the bottom of the iOS device. This digital connection enables the adaptor to offer ‘pro-quality audio specs’.

Mobile In supports up to 24-bit/48 kHz digital audio. The Guitar input features 110 dB dynamic range. The stereo Line input, which is perfect for sending keyboard audio or any other standard mono or stereo line-level audio source to your iPhone or iPad, has 98 dB dynamic range.

Mobile In includes a 6-foot guitar cable. Mobile POD is a free download from the App Store. Mobile In and Mobile POD are made for iPhone 4, iPad 2 and iPad.

Mobile In and Mobile POD are expected to ship Fall 2011, with Mobile In priced at US  $79.99.