iOptigan is a multimedia application developed by Stefan Stenzel for iPhone users. It is a digital recreation of the Optigan, an iconic chord organ from the 1970s known for its unique sound reproduction using optical discs.

With iOptigan, users can experience the nostalgic charm of the Optigan right on their iPhones. The app faithfully replicates the scratchy lo-fi sound of the original instrument, allowing users to explore the distinct musical styles of the past.

The app comes with 25 of the original 40 discs, each containing a specific style of music such as Bossa Nova and Big Band. Additional discs can be purchased individually or as a complete package.

iOptigan also offers a range of features to enhance the user experience. It supports disc loading in both orientations, offers a virtual spring reverb, and includes an optical metronome for precise timing. Users can also import MIDI files, record and playback their own sequences, and share their creations as audio or MIDI files.

With its intuitive interface and comprehensive features, iOptigan is the perfect app for musicians and enthusiasts looking to explore the vintage sound of the Optigan organ on their iPhones.