MIDI Communication:
The MIDI communication is based on sample code by Pete Goodliffe.
Thank you to Pete for publishing his sample code on the internet.
You can find more information here:
http://goodliffe.blogspot.com/2010/10/using-coremidi-in-ios-example.html
Music Symbols:
The music symbols for insertion with the annotation function are from Linkware Graphics.
Thank you to Shirley Kaiser for publishing these symbols.
You can find more information here:
http://linkwaregraphics.com/music/
In-App-Settings:
The in-app settings were realized with "InAppSettingsKit". Thank you to Luc Vandal and Ortwin Gentz for the development and publication.
You can find more information here:
https://github.com/futuretap/InAppSettingsKit
OpenSSL:
SongBook+ uses OpenSSL. According to the licensing terms, this must be mentioned with the following statement:
“This product includes software developed by the OpenSSL Project for use in the OpenSSL Toolkit (http://www.openssl.org/).”