In this lesson, we will see sequence of 12 notes in scale A# on harmonium or keyboard keys. First of all, the sequence of 12 notes is:

1. Sa
2. Komal Re
3. Shuddha Re
4. Komal Ga
5. Shuddha Ga
6. Shuddha Ma
7. Teevra Ma
8. Pa
9. Komal Dha
10. Shuddha Dha
11. Komal Ni
12. Shuddha Ni

If you are not sure about these 12 notes and their sequence, do watch this lesson Introduction to 12 notes in music.

Sequence of 12 notes starting from A#2 is:

1. A#2
2. B2
3. C3
4. C#3
5. D3
6. D#3
7. E3
8. F3
9. F#3
10. G3
11. G#3
12. A3

Hence mapping the above two sequences, sequence of all 12 notes in harmonium/keyboard/piano with A#2 as 'Sa' is:

The same sequence of notes is applied A#3 onwards (called taar saptak or higher octave) and below A#2 (called mandra saptak or lower octave). To know more about saptak or octaves watch this lesson Introduction to octaves/saptak in music.

For another example of sequence of these notes, you can see this lesson Representation of 12 notes on harmonium/keyboard keys in Scale C#