Update README.md

README.md

@@ -77,7 +77,7 @@ This does not apply to the data files:
 * Schubert songs are taken from the [Schubert Winterreise Dataset](https://zenodo.org/record/4122060). 
 * Recording of the cantata *Ach Gott und Herr* by Bach is taken fom [Bach10 Dataset](https://labsites.rochester.edu/air/datasets/Bach10%20Dataset_v1.0.pdf).
 * Recording of *Locus Iste* by Anton Bruckner is taken from the [Dagstuhl Choir Set](https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=&ved=2ahUKEwiJ1JnT9uuEAxXclP0HHUOXC4EQFnoECBMQAQ&url=https%3A%2F%2Fwww.audiolabs-erlangen.de%2Fresources%2FMIR%2F2020-DagstuhlChoirSet&usg=AOvVaw1sPox9R_Sh1eh5hqV2kgNs&opi=89978449).
-* Custom piano audio sample is taken from the [Single Note Database (SNDB)](https://github.com/audiolabs/SNDB)
+* Custom piano audio samples are taken from the [Single Note Database (SNDB)](https://github.com/audiolabs/SNDB).
 * Other audio files are taken from the [FMP notebooks](https://www.audiolabs-erlangen.de/resources/MIR/FMP/C0/C0.html).
 
 ## Acknowledgements