The audio application for the 4th-grade English textbook by O.A. Denisenko , M.Z. Biboletova, and N.N. Trubaneva (part of the School 2100 educational system) is primarily available through official publishing platforms. Where to Listen and Download
"Enjoy English" / "Английский с удовольствием".
Educational resources like the NS Portal library provide links to legacy Rosuchebnik collections where these audio files are often hosted.
Английский язык. Аудиокурс. 4 класс - Просвещение
For a physical or permanent digital copy, the audio application (CD MP3) is listed at retailers like StudentsBook.net . Textbook Details