# Lesson 8

# Interval Lesson. In this lesson, we will use
# variables to create melodic and harmonic
# intervals.

# General Instructions:
#
# This lesson contains one example and
# one exercise (A).
#
# To listen to an example, change "comment"
# to "uncomment" on the "comment do" line,
# then click the "Run" menu command at the
# top of the Sonic Pi editor window.
# When you are done with the example, turn
# it off by changing "uncomment" back to
# "comment," and move on to the next section
# of the lesson.
#


# Example 1: Melodic Intervals:

comment do
  unison = 0
  major_second = 2
  major_third = 4
  perfect_fourth = 5
  perfect_fifth = 7
  octave = 12

  play :C
  sleep 1
  play :C + major_second
  sleep 1
  play :C
  sleep 1
  play :C + major_third
  sleep 1
  play :C
  sleep 1
  play :C + perfect_fourth
  sleep 1
  play :C
  sleep 1
  play :C + perfect_fifth
  sleep 1
  play :C
  sleep 1
  play :C + octave

end

# Exercise A:
#   1) Change Example 1 by adding a major 6th
#      and a major 7th. Place the code to play
#      these intervals (up from :C) between
#      the code to play the perfect 5th and
#      the code to play the octave.
#   2) Change Example 1 so that the intervals are
#      played as harmonic intervals instead of melodic
#      intervals (but keep the sleep command
#      between each interval).