[Mod] RSModsPlus - digital drop pedal for RS2014

I've added a drop pedal to RSMods. It shifts your guitar's pitch in-game, up to two octaves either way, and moves what the game expects to hear by the same amount so note detection stays in agreement with what you're playing.

How it works:

Note detection reads the raw signal upstream of the tone chain, so anything in the chain is invisible to it. Shifting the audio alone would leave you playing in Eb while the game marked you against E. The mod drives Rocksmith's own MultiPitch pedal for the audio, then redirects the reference frequency the game derives expected pitch from. That's the same value you set as an arrangement's tuning pitch when charting, which is why this works at all. Shift the audio down a semitone move the expectation up one, and the two agree.

Consequences worth knowing:

- Requires a MultiPitch pedal in your tone. It can only go in the Pre slot, and there's only one, so it replaces whatever was there. Leave its pitch setting at 0 - the mod's shift adds to whatever is set there.

- Emulated bass is the same setup, except you set the pedal's pitch to -12. The MultiPitch replaces the bass emulator that was in the Pre slot, so the tone needs that octave put back. After that it behaves exactly as on guitar.

- Set the drop pedal before you enter the tuner. The game latches expected tuning once and holds it for the song.

- Headphones, since your strings are still physically in E. Base tuning can be set in game

Fork of RSMods 1.2.8.2, so the rest of RSMods is unchanged. Credit to Lovrom8 and ffio1.

GitHub

Reverse-engineering notes, including what was ruled out along the way:

https://github.com/Cheesewizard/RSModsPlus/blob/develop/docs/wwise-plugin-internals.md