Squeezebox Studio
Scale

C Mixolydian on a B/C button accordion

C Mixolydian uses C, D, E, F, G, A and B♭. On a B/C you can play the whole scale up from C4 and C5.

It has the same notes as F major, so the buttons are the same; what changes is the note the tune comes home to.

From C4 to C5

Push, above the linePull, below the line

No single row has every note of this octave, so you have to cross between the rows. This is the way with the fewest changes of bellows: four going up, and four moves between rows.

C rowinsideE3A31'G3B32'C41D423'E4F444'G45A465'C58B46'E5D57'G5F58'C6A59'E6B510'B rowoutsideD♯3G♯31F♯3A♯32B3C♯43D♯4E434F♯4G♯45B4A♯476D♯5C♯57F♯5E58B5G♯59D♯6A♯510F♯6C♯611
The same way, marked on the box: numbers give the order, blue halves are push and orange are pull.
Every button for each note of this octave
NoteButtons
C43′ push
D43′ pull
E44 pull, 4′ push
F44′ pull
G45′ push
A45′ pull
B♭46 pull
C56′ push

From C5 to C6

Push, above the linePull, below the line

No single row has every note of this octave, so you have to cross between the rows. This is the way with the fewest changes of bellows: four going up, and four moves between rows.

C rowinsideE3A31'G3B32'C4D43'E4F44'G4A45'C51B46'E5D527'G55F548'C68A569'E6B510'B rowoutsideD♯3G♯31F♯3A♯32B3C♯43D♯4E44F♯4G♯45B4A♯46D♯5C♯57F♯5E538B5G♯59D♯6A♯5710F♯6C♯611
The same way, marked on the box: numbers give the order, blue halves are push and orange are pull.
Every button for each note of this octave
NoteButtons
C56′ push
D57′ pull
E58 pull, 7′ push
F58′ pull
G58′ push
A59′ pull
B♭510 pull
C69′ push

Above and below

From C3 the scale is incomplete: this box has no C3, D3 or F3. Tunes that go that far down will need a different note there, or a different key.

Tab is only the start

A scale shows where the notes are, but a tune rarely runs straight up the octave. Whether you play a note on the push or the pull depends on the notes either side of it, the rhythm, and whether you play along the rows or across them. Along or across the rows explains the difference.

Same notes, different home: F major, D minor, G Dorian.

C Mixolydian on other boxes: G/C melodeon.

Other keys on a B/C: G major, D major, A major, C major, F major, E major, E minor, A minor, B minor, D minor, G minor, A Dorian, E Dorian, D Dorian, B Dorian, G Dorian, D Mixolydian, A Mixolydian, G Mixolydian. Or see every key compared and the B/C button chart.