Humdrum homework

Music 253 Humdrum Homework

Examine the melodic and harmonic properties of the Bach chorale data set. Refer to [Humdrum Lab 1] for how to download the chorales (and install the tools useful for the homework).

Melodic intervals

Here is a template for extracting the melodic intervals for the Tenor part in the chorales and plotting them in a histrgram by percentages:

    extractx -s 2 *.krn | mint | grep -v r | ridx -H | grep -v [[] | \
      sortcount -vp --sort interval -T "Tenor melodic intervals" > melodic-tenor.html

This plot should be displayed when opening up the generated HTML file:

Make plots for bass (spine 1), alto (spine 3), and soprano (spine 4) and visually compare the plots to each other.

Questions:

1. Which part has the most repetitions (P1 interval)? 2. Which part has the most leaps (intervals greater than 2 or less than -2)?

Harmonic intervals

Here is an example of how to extract the harmonic intervals between the soprano and bass parts:

    extractx -s 1,4 *.krn | hint | ridx -H | grep -v [r-] | sortcount -pv -T "Harmonic intervals between Soprano and Bass" --sort interval  > analysis.html

This plot should be displayed when opening up the generated HTML file: