Eiji & Tom has released iToneMaker - Morse Edition (iTM) version 1.2 for iPhone.
iTM is an iPhone synthesizer based on the Morse Signal protocol. From any phrases, iTM generates unique rhythm sequences. The tone is totally customizable with the built-in effectors and OSCs. The Macro and Smart Pitch features also let you play melody. It is the first Morse music instrument, according to Eiji & Tom.
You can upload audio samples directly from iPhone as MP3 and M4R (iPhone ringtone format). Lossless export (WAVE/AIFF) to Dropbox and to iTunes File Sharing needs a paid upgrade. However, all the musical features are available for free. The PRO Pack in-app purchase is $1.99.