Give this page a set of musical notes and/or chords, and it'll tell you what chords and scales contain or are contained by that set (along with all the notes in those scales and chords).
http://scottdavies.net/chords_and_scales/music.html

Lots of good info here. Good find.

I scrolled down to see how many upper extensions they handled (lots) but noticed something odd: a minor third is always shown as a sharped second.

For example, look at a simple Cm chord. It isn’t C, Eb, G but instead is C, D#, G. I wonder why.

EDIT: Found it. There is a setting to show only sharps, only flats, or both. Still, a bit odd that it shows both sharp AND flat, rather than choosing the 'right' enharmonic note.

The great feature is that if you enter chord tones (must separate by a space or a comma!), it gives you chord names containing those notes, including other notes. Good feature.

Really cool find, thanks for sharing!

pghboemike:
That is a cool piece of work.
Would you mind elaborating for the benefit of the (largely) self taught an example or two of how you
(or any others on this thread) put this remarkable tool to use?
I can see how advanced composers such as
Mario or Matt Finley, David Snyder, or yourself might run into
theoretical applications quite often beyond
the scope of counting by fingers, (my method.) I have also been struck by how many Berklee grads, esp. the jazz ones, are so totally versed in chords.
Briefly, how can this tool help someone like me?

RapidComposer has a lot of tools for that:

first i'm in no way in the same company as Mario or Matt Finley, David Snyder or any of the other fine songwriters who are members of these forums
though i do enjoy composing mostly instrumental original material using my ears guitar & tools like this

which is why something like this is valuable

the reaultes of entering Cmaj Gmaj Am Fmaj as chords for a song like let it be and may others



presuming you had these chords in your song in some order you could then use biab/rb to experiment using the scales and additional chord suggestions

if you enter the notes of your melody instead you'll get suggested scales and chords to go with it

Chord Identifier (Reverse Chord Finder) is also useful

Thanks for the information, pbghmike. You're modest.
I hadn't intended to single out anyone in particular, but,
rather, to illustrate the point. If I were to list the exceptional
talents associated with this forum, I'd still be writing.
The topic has had the effect of stimulating thought on
my part. Probably shouldn't go there, but, "How the heck
does Band-in-a-Box work, anyway?" The video that shows
how the same progressions may create different songs
provides a clue, not the whole answer. I find, sometimes,
renderings seem to contain the melody, with no
explanation as to how that could be. It's like they
have some weird Ai in a cage, somewhere.

They do.