See also: Making a Note Block Project

Music may need to be composed for a project. This is where this tutorial comes in handy.

Note Note: This tutorial requires experience in the basics of music and its notation.



The play note () for () beats block can sometimes be tricky to get used to since the notes and rhythms are notated with numbers, unlike sheet music. These diagrams may help:


The note names are written on the keys. Notes written in the two most common clefs (treble clef and bass clef) are connected to the piano. All notes can be written in an infinite number of ways. The most common enharmonic notes are included. A line going from a long red box means the notes go to the same key on the piano. Even though the drop-down keyboard on each block shows only one octave of notes, a number can be put in manually to get any note. To change octaves, simply add or subtract 12, or click on the arrows at the top of the keyboard.

There are 131 notes on Scratch's keyboard, numbered from 0 (C-1, about 8.18 Hz) to 130 (B♭9, about 14917.24 Hz). Each note is 1 number larger than the previous, and the ratio of frequency is always (approximately 1.06), with A4 being exactly 440 Hz.

Note Note number Frequency
C3 48 131 Hz
C♯3/D♭3 49 139 Hz
D3 50 147 Hz
D♯3/E♭3 51 156 Hz
E3 52 165 Hz
F3 53 175 Hz
F♯3/G♭3 54 185 Hz
G3 55 196 Hz
G♯3/A♭3 56 208 Hz
A3 57 220 Hz
A♯3/B♭3 58 233 Hz
B3 59 247 Hz
C4 (middle C) 60 262 Hz
C♯4/D♭4 61 277 Hz
D4 62 294 Hz
D♯4/E♭4 63 311 Hz
E4 64 330 Hz
F4 65 349 Hz
F♯4/G♭4 66 370 Hz
G4 67 392 Hz
G♯4/A♭4 68 415 Hz
A4 69 440 Hz
A♯4/B♭4 70 466 Hz
B4 71 494 Hz
C5 72 523 Hz


This table shows the beat number values for the most common rhythms in the most common time signatures, interpreted in the most basic way.

SVGSemibreve.svg SVGDottedMinim.svg SVGMinim.svg DottedCrotchet.svg SVGCrotchet.svg SVGTripletCrotchet.svg SVGDottedQuaver.svg SVGQuaver.svg SVGripletQuaver.svg SVGDottedSemiQuaver.svg SVGSemiQuaver.svg
SVGTimeSig4-4.svg or SVGTimeSigCommonTime.svg 4 3 2 1.5 1 0.75 0.5 0.375 0.25
SVGTimeSig3-8.svg 8 6 4 3 2 1⅓ 1.5 1 0.75 0.5
SVGTimeSig2-2.svg or SVGTimeSigCutTime.svg 2 1.5 1 0.75 0.5 0.375 0.25 0.1875 0.125


Tempo is how fast the notes are played. If the tempo is 60 beats per minute and the time signature is 4/4, there is one quarter note every second, or 60 per minute. Likewise, if the tempo is 120 beats per minute, and the time signature is 4/4, there are 2 quarter notes in a second.


There are many scales in music. The main ones are the chromatic (all of the 12 notes), major, minor (natural/harmonic/melodic), and pentatonic.


Key Notes
C♯/D♭ C♯/D♭ D♯/E♭ F F♯/G♭ G♯/A♭ A♯/B♭ C C♯/D♭
D D E F♯/G♭ G A B C♯/D♭ D
D♯/E♭ D♯/E♭ F G G♯/A♭ A♯/B♭ C D D♯/E♭
E E F♯/G♭ G♯/A♭ A B C♯/D♭ D♯/E♭ E
F F G A A♯/B♭ C D E F
F♯/G♭ F♯/G♭ G♯/A♭ A♯/B♭ B C♯/D♭ D♯/E♭ F F♯/G♭
G G A B C D E F♯/G♭ G
G♯/A♭ G♯/A♭ A♯/B♭ C C♯/D♭ D♯/E♭ F G G♯/A♭
A A B C♯/D♭ D E F♯/G♭ G♯/A♭ A
A♯/B♭ A♯/B♭ C D D♯/E♭ F G A A♯/B♭
B B C♯/D♭ D♯/E♭ E F♯/G♭ G♯/A♭ A♯/B♭ B

Minor (natural)

Key Notes
C C D E♭ F G A♭ B♭ C
C♯/D♭ C♯/D♭ D♯/E♭ E/F♭ F♯/G♭ G♯/A♭ A/B𝄫 B/C♭ C♯/D♭
D D E F G A B♭ C D
D♯/E♭ D♯/E♭ E♯/F F♯/G♭ G♯/A♭ A♯/B♭ B/C♭ C♯/D♭ D♯/E♭
E E F♯ G A B C D E
F F G A♭ B♭ C D♭ E♭ F
F♯/G♭ F♯/G♭ G♯/A♭ A/B𝄫 B/C♭ C♯/D♭ D/E𝄫 E/F♭ F♯/G♭
G G A /B♭ C D E♭ F G
G♯/A♭ G♯/A♭ A♯/B♭ B/C♭ C♯/D♭ D♯/E♭ E/F♭ F♯/G♭ G♯/A♭
A♯/B♭ A♯/B♭ B♯/C C♯/D♭ D♯/E♭ E♯/F F♯/G♭ G♯/A♭ A♯/B♭
B B C♯ D E F♯ G A B


Key Notes
C C D F G A♯/B♭ C
C♯/D♭ C♯/D♭ D♯/E♭ F♯/G♭ G♯/A♭ B C♯/D♭


  • The music should sound interesting. Try to play the song regularly to make sure it is right.
  • If the needed instrument cannot be found, try to approximate it with a similar instrument. If it still cannot be found, try a different instrument.
  • To play chords, a broadcast block and one script are needed for each note to be used in the chord(s).
  • A broadcast block can be added in the middle of the song. This can be used to add and remove voices in a song; for example to make some parts of the song seem more grand, while others seem weaker. Multiple voices in a song often get desynchonized with each other (e.g. parts of a chord playing too early or late) so broadcasts can also be used to synchonize them.
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