Rating: 5.0

## Solution
The provided image contains notes on the [bass clef](https://en.wikipedia.org/wiki/Clef), all within a single [octave](https://en.wikipedia.org/wiki/Octave). An octave is composed of 12 [semitones](https://en.wikipedia.org/wiki/Semitone), suggesting that the values can be decoded as base12. The following table provides the conversion from semitone to value:

| Note | Value |
| ---- | ----- |
| C3 | 0 |
| C#3 | 1 |
| D3 | 2 |
| D#3 | 3 |
| E3 | 4 |
| F3 | 5 |
| F#3 | 6 |
| G3 | 7 |
| G#3 | 8 |
| A3 | 9 |
| A#3 | 10 |
| B3 | 11 |

Reading the notes results in the pairs:

G3C3 | G#3G#3 | G#3F3 | D3G#3 | F3A#3 | A3C3 | G#3C#3 | G#3G | D3G#3 | G#3A3 | A3G3 | D3G#3 | D3A#3 | G#3F#3 | A3C3 | G#3C#3 | G#3G3 | A#3D#3 | F#3F3 | A3A3 | A3G3 | G#3A3 | G#3D#3 | F#3C#3 | A3G3 | F3F3 | A3B3 | G#3F3 | A3G3 | A3D#3 | A3C#3 | G#3F3 | A#3F3 | D3A#3

Converting from base12 to base10, the first set becomes:

84 is the ASCII character T.

Continue this conversion for the remaining pairs of notes to get the integers 84, 104, 101, 32, 70, 108, 97, 103, 32, 105, 115, 32, 34, 102, 108, 97, 103, 123, 77, 117, 115, 105, 99, 73, 115, 65, 119, 101, 115, 111, 109, 101, 125, 34 which, in ASCII, is

The Flag is "flag{MusicIsAwesome}"


## Flag
**flag{MusicIsAwesome}**

Original writeup (https://malcrypt.gitlab.io/blog/ctfs/2021/tenable/stego/music/).