To cite tuneR in publications use:

Ligges U, Krey S, Mersmann O, Schnackenberg S (2023). tuneR: Analysis of Music and Speech. https://CRAN.R-project.org/package=tuneR.

Corresponding BibTeX entry:

  @Manual{,
    title = {{tuneR}: Analysis of Music and Speech},
    author = {Uwe Ligges and Sebastian Krey and Olaf Mersmann and Sarah
      Schnackenberg},
    year = {2023},
    url = {https://CRAN.R-project.org/package=tuneR},
  }