a corpus of Estonian regilaul folk songs from the Estonian Folklore Archives:
https://www.folklore.ee/pubte/eraamat/rahvamuusika/en/index
this repository contains audio files, corresponding tempo maps, txt files of lyrics, and the scripts used to annotate and analyze the acoustic correlates of stress in ictus and off-ictus position in the songs.
I made extensive use of the praatio library in manipulating the textgrids. thanks, praatio. Tim Mahrt. PraatIO. https://github.com/timmahrt/praatIO, 2016.
Could be modified to study other songs in other languages.
For tempo mapping tutorial: (to come) if you want to see the spectrograms with the textgrids, download the audio and grid files and view them in PRAAT: https://www.fon.hum.uva.nl/praat/