E flat major has three flats - B, E, and A.
The key signature is E flat major, which is also, C minor, the relative minor of E flat major. You can find out what flat key signature you're in by finding the second to last flat (in this case E flat). It is the major version of that key signature!
The keys of Eb Major and c minor have three flats in their key signatures: Bb, Eb, and Ab.
Bbb Eb Ab Db Gb Cb Fb. Far from being strictly theoretical, the key F flat major becomes important when a composition in Cb major modulates to the Subdominant, the second most common modulation. The key-change may be indicated either through accidentals (double-flats placed beside notes), or through a change of key signature. While some composers might write a sonata in the key of Cb major, they might wish their second movement to be in the Subdominant key. They have the option of notating with a key signature of 8 flats (which shows the relation to the first movement), or using it's enharmonic equivalent, E major (key signature: 4 sharps), to simplify reading.
Eb Major & C minor
Eb major
Eb major/C minorAb major/F minorDb major/Bb minorGb major/Eb minor
The key signature will consist of two flats: Bb, and Eb.
No key signature could have only Eb and Gb, but some include those two e.g. Db Major, Gb Major, Bb minor and Eb minor.
C MINOR is the relative minor to Eb major, meaning both keys have the same key signature.
The key with three flats (Bb, Eb, Ab) is the key of Eb.
A major key sounds more bright and cheerful than a dark, evil minor key signature. There are 12 major key signatures (C, F, Bb, Eb, Ab, Db, Gb, B, E, A, D, and G). To identify whether a piece is minor, look at the key signature. If the name of the key signature is the name of the last note, then you are in a major key signature. If it is not, chances are you are in a minor key signature.
Bb and Eb
The key signature is E flat major, which is also, C minor, the relative minor of E flat major. You can find out what flat key signature you're in by finding the second to last flat (in this case E flat). It is the major version of that key signature!
The key signatures are the same in both clefts, but the flats are placed in different locations since the notes themselves are found in different places. The key of Eb major has three flats: Bb, Eb, and Ab.
Bb, Eb and Ab
the time signature is 2/2 (cut time) and the key is Eb maj
The key signature for the C Dorian mode is two flats: Bb and Eb.