Ok what I'm looking for is. A decently powerful tone generator app that would be capable of generating tones from 5hz up. Including settings for sine, square, ect sweeps and the ability to save as mp3 format. The purpose of this app is for tuning and tweaking the soud systems for competition vehciles. Id like to be able to create a sine sweep or specific frequency on the go. Thank you and payment is a deffinate