Sandbox Education

1. Siobhan Ramsey
Chief Exec
1
http://sandboxeducation.co.uk
info@sandboxeducation.co.uk
Compute the [Blues]

2. We are Sandbox Education

3. Compute the [Blues]
in Sonic Pi
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4. [Computational Blues]
12 Bars in the Key of C
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5. Computational Process
• analyse the problem and identify an algorithm
• break the problem down into a series of steps or
sub-problems
• create new algorithms and write pseudocode
• code, test and debug each sub-problem
• code sub-problems into parallel threads, test and
debug
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6. Algorithm
Blues Chords + Blues Scale Notes
played over 12 bars = 12 Bar Blues
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7. Sub-Problem 1
Blues Chords
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8. Sub-Problem 1
Code Blues Chords
over 12 Bars
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9. Chords
and Notes
Blues
Chords
Notes
C7 C E G Bb
F7 F A C Eb
G7 G B D F
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10. play C play 60
play C play 48
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11. Music Notes [C]
Midi Values [60]
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12. Code in Sonic Pi
Music Notation Midi (computer) Notation
play C3 play 48
play E3 play 52
play G3 play 55
play Bb3 play 58
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13. C7 Chord
Blues
Chords
Notes
C7
C E G Bb
60 64 67 70
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14. F7 Chord
Blues
Chords
Notes
F7
F A C Eb
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15. G7 Chord
Blues
Chords
Notes
G7
G B D F
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16. Blues Chords
Chord C7 F7 C7 G7 F7 C7
Bar 1 2 3 4 5 6 7 8 9 10 11 12
Notes 16 8 8 4 4 8
Total
Notes
48
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17. [Chords]
C7
play 48
play 52
play 55
play 58
F7
play
G7
play
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18. Blues Chords 4 Bars
C7 Chord
16.times do
play 60
play 64
play 67
play 70
sleep 1.0
end
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19. Function
play_chord [67, 71, 62, 65]
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20. 16.times do
play_chord [60,64,67,70]
sleep 1.0
end
16.times do
play_chord [48,52,55,58]
sleep 1.0
end
C7 Octave 4
C7 Octave 5
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21. Bar 1 2 3 4 5 6 7 8 9 10 11 12
Chord C7 F7 C7 G7 F7 C7
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22. 8.times do
play_chord [53,57,48,56]
sleep 1.0
end
16.times do
play_chord [60,64,67,70]
sleep 1.0
end
F7 Octave 3
C7 Octave 4
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23. # Octave 3 C7
play_chord [48,52,55,58]
# Octave 3 F7
play_chord [53,57,48,56]
# Octave 3 C7
play_chord [48,52,55,58]
#G7 Octave 4
play_chord [?]
# Octave 3 F7
play_chord [53,57,48,56]
# Octave 3 C7
play_chord [48,52,55,58]
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24. Melody
Sub Problem 2
Blues Scale
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25. Melody
Scale Notes
C Blues C Eb F F# G Bb C
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26. Function
play_pattern [:C, :Eb, :F, :Fs, :G, :Bb, :C5]
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27. # Welcome to Sonic Pi v2.1.1
#Blues Scale Octave 4 and 5
48.times do
play_pattern [:C, :Eb, :F, :Fs, :G, :Bb, :C5]
play_pattern [:C5, :Eb5, :F5, :Fs5, :G5, :Bb5, :C55]
sleep 0.25
end
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28. To Do!
• use rand for random function to vary the notes in the
blues scale
• code the chords and the scale to play at the same
time ( in thread do)
• experiment to find the right temp or bpm 100+
• experiment to find the best synth
• experiment to find the best release and attack values
for blues
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29. Get in touch…
Computing CPD
Computing Lessons
Hacks and Jams
Tech Fests
Hackathons
Hardware
info@sandboxeducation.co.uk

30. Siobhan Ramsey
info@sandboxeducation.co.uk