deprecated redundant tuning functions and clarify docs
deprecated redundant tuning functions and clarify docs

nezticle/fluidsynth,nezticle/fluidsynth,nezticle/fluidsynth,nezticle/fluidsynth,FluidSynth/fluidsynth,FluidSynth/fluidsynth,FluidSynth/fluidsynth,FluidSynth/fluidsynth