Roland tells us that their sound module, SOUND Canvas, has come back for iPhone and iPad. This is what they have to say about it:
SOUND Canvas for iOS is the software synthesizer built-in SMF *1 player. It is based on Roland GS standard that has been de fact standard sound source, "SOUND Canvas" of Roland Desk Top Music (DTM).
It is compatible with the sound for "GS","GM2", and "GM". It includes Reverb, Chorus, Delay, and 2 Band EQ, plus 64 types of insertion effects *2.
In addition, it plays SMF for "SC-88Pro" and "SC-8820". *3
You can enjoy the old data created by SOUND Canvas series and a variety of GS data on the market from Roland with high quality sound.
*1: SMF:Standard MIDI File with extension ".mid". *2: This utility canNOT edit the tone nor insertion effect. *3: Subtle nuance of Tone color, Volume balance, trigger timing of note on may vary depending on the data.
Two types of graphical user interface: "Sound Canvas skin" for music data creation and "Player skin" for practicing with instruments or karaoke application.
High quality MIDI file sounds by its 1,600 tones and 63 factory drum presets.
Convenient functions:"LOOP" mode to repeat your specifying region, "SONG LIST PLAY" to play sequentially plural songs, and more multifunction.
MIDI interface (separately sold) connection enables to receive MIDI data from the external devices to play sounds.
Available with a music application compatible for the Core MIDI.
Pricing and Availability: $14.99 ( until Feb 10, 2015) at the app store.