This version actually contains the same recordings as the first version posted earlier (https://doi.org/10.5281/zenodo.6761971). The tone diagram uploaded in that earlier version is now included in a PDF document, entitled An introduction to a Tai Muong variety spoken in Châu Phong Commune (Quỳ Châu District, Nghệ An Province, Vietnam), which could not be uploaded in this version and has to be posted separately (https://doi.org/10.5281/zenodo.7472112). The lexical items which appear in the recordings are the following ones. They were selected to provide examples of monosyllabic words for each of the twenty boxes in Gedney’s tone diagram. 1-10: một [nɯŋB1]; hai [sɔ:ŋA1]; ba [sa:mA1]; bốn [si:B1]; năm [ha:C1]; sáu [hokDS1]; bảy [cetDS2]; t...