The `harmonicinterval` module
Eelmine | Peatükk 4. Extending GNU Solfege | Järgmine

## The `harmonicinterval` module

User documentation is in “Harmooniline intervall”.

Here is a minimal lesson file:

    header {
      module = harmonicinterval
      version = "3.1.4"
      title = "Seconds"
      intervals = [1, 2]
      test = "3x"
      test_requirement = "90%"
    }

Additional variables you can put in the header. Click on the link to get an explanation:

- disable_unused_intervals

- lesson_heading

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