Key signature A minor as each accidental may be notated explicitly as required, or the piece may be modal or atonal. An example is Bartók's Piano Sonata, which has no fixed key and is highly chromatic. If not bound by common practice conventions, microtones can also be notated in a key signature; which microtonal symbols are used depends on the system. The common practice period conventions are so firmly established that some musical notation programs have been unable to show nonstandard key signatures until recently. The use of a one-flat signature developed in the Medieval period, but signatures with more than one
The Signature Series divided into 2 seasons: Season 1 and Season 2. In Season 1, when each episode was published online at CBC Music, the information about each key consisted of the notes in that key (the harmonic minor scale is always mentioned, not the natural minor), its relative major or minor, the number of sharps or flats in its key signature, the key's other nicknames, a list of fictional and real life characters representative of the key, and a couple of quotes about the key. In Season 2, the information about each key is replaced by the key's main traits, biggest strength,