The singchord module

Questions for this exercise need to have the key variable set if the key signature is anything else than ''c'' major (or ''a'' minor). Example:

header {
  module = singchord
  lesson_id = "a404df62-e037-6a1b-9027-cd05397e88a2"
  version = "3.1.4"
  title = "Simple chords"
}
question { music = "c''|e'|g|c" }
question { music = "a'|e'|c'|a" }
question { key="d \major" music = "a'|fis'|d'|d"}
question { key="f \minor" music = "as'|f'|c'|f"}

See also the section called “Sing chord”.