There is often more than one way of writing a particular note. For example, the note F sharp can also be called G flat. These two notes have exactly the same sound and the same fingering. Therefore, either spelling of the note may occur in the written music. This is called enharmonic spelling of the same note. The C Blues scale is often written using a Gb note instead of an F# note. The following example uses both versions of this note.
Once you are comfortable playing the Blues scale in the low register, try playing it over two octaves. Use the octave key to sound the notes Bb and C in the middle register.
This 12 Bar Blues solo makes use of the Blues scale in both the low and middle registers.