Audiobus: Use your music apps together.
What is Audiobus? — Audiobus is an award-winning music app for iPhone and iPad which lets you use your other music apps together. Chain effects on your favourite synth, run the output of apps or Audio Units into an app like GarageBand or Loopy, or select a different audio interface output for each app. Route MIDI between apps — drive a synth from a MIDI sequencer, or add an arpeggiator to your MIDI keyboard — or sync with your external MIDI gear. And control your entire setup from a MIDI controller.Download on the App Store
Audiobus is the app that makes the rest of your setup better.
These are mostly high quality soundfonts (*.sf2) compatible with BS-16i and a few other apps. These are currently compressed (rar), but don't worry the entire process can still be done on an iPad only. Simply download the files you would like from Dropbox, then "Open In..." an app like GoodReader, extract (unzip) the file exposing the .sf2 file, then "Open In..." BS-16i or a compatible program. The process can be simpler if you copy the download link and paste it into GoodReader's download manager, this eliminates use of a browser and a few steps.
Please note and credit the makers of Evanessence 2 (KVR forum) and Saint James Orchestra (and a few unknowns) for these high quality instruments and Viena SoundFont Editor for a great program. I simply took the best and most desirable files and compiled them into a few separate soundfonts. As with anything there may be a few "duds" but most should be great. Enjoy!
Piano & Organ (86/273mb)
Guitar & Bass (121/271mb)
Roland SC-55 (15/25mb)
Roland SC-55 is a great all-around soundfont only 25 mb and has a ton of instruments loaded with quality and variety
Guitarded & Orchestrated 44mb & 40mb
This is two separate soundfonts zipped into one file. Guitarded is a lot of guitars and is 44mb and Orchestrated is a ton of pretty good (mostly Saint James Orchestra) orchestra instruments. Both have a small memory footprint.
Size doesn't always matter with soundfonts (haha); Roland SC-55, Guitarded, and Orchestrated all take up minimal space while providing great quality and variety. Let me know if you have any issues with files, links, etc...Profit!