Hokusai Audio Editor
Description of App
from the app page from the app store:
"Beautiful clutter-free interface" — TouchProducer.com
"Hokusai will convince you that audio was meant to be edited with a touch screen — it's just so natural within this app that you’ll find yourself consistently coming back to it." — iOS Music And You
Hokusai is a multitrack audio editor for iPhone or iPad. Record or import a track, and make it sound the way you want it to: not just trimming the ends, but full cut, copy, paste and delete, and a suite of filters and special effects available.
Edit many tracks side-by-side, mix them together, and export to wave or mp4 format — then transfer them to your computer via USB or Dropbox, or send them to another app on your device.
User description:
In version: 1.0.8, Accessibility features have been greatly enhanced: controls have been modified to read correctly. An accessible audio selection method/interface has been added.
Version
Free or Paid
Compatibility
Device(s) App Was Tested On
Accessibility Comments
In version: 1.0.8, Accessibility features have been greatly enhanced: controls have been modified to read correctly. An accessible audio selection method/interface has been added. Voiceover does not read the music library pannel, this has been found to be an Apple pannel accessibility issue rather than an in-app issue. All other parts of the app interface read, and interact correctly, with Voiceover

Comments
#1 Surprised.
I'm surprised this app is free, for all it does.
I haven't checked it out yet because I haven't felt the need too, but I probably will in the future if it's free.