While I couldn't find an official source that provides free audio materials for "Suomen Mestari 1", there are some alternatives you can explore:
Below are the instructions to access the official free audio materials based on which edition of the book you are using. 1. Official Free Audio (Old Edition) suomen mestari 1 audio free
Note: These are rarely the full 100+ tracks. They usually cover the first 20 tracks (Chapters 1-2). This is enough to master the basics of greetings, numbers, and verb type 1. While I couldn't find an official source that
Scan individual pages to instantly play the corresponding audio for dialogues and texts. Finn Lectura / Nova Website (Older Version): suomen mestari 1 audio free