Now this is going to sound dumb for someone who claims to know theory but it is something that I think is crucial to understanding what you are talking about and something that has never really sunk in with me (because I am not traditionally trained).
When you use the term "pedal" I assume you are referring to "pedal point". Could you expand on that and explain it to me like a child? I know it is likely a simple concept but the term seems to get used a lot without explanation in much of the material I've studied. I know (think) it's some kind of revolving point for progressions but the precise function and definition eludes me.
Also the Alt chord concept kind of weirds me out. What is the step construction of an Alt chord? I seem to recall that being a chord to use travelling between a specific point and that a "melodic minor" mixolydian mode works well over it (I am scrounging that from memory though and it has been a while... I have it writtten down somewhere). Point is since it is in between chord steps I'm just wondering how it is constructed and what it is constructed from.
Sorry if that is totally wrong or stupid. This is quite interesting. Thanks.