I successfully used the format of audio files M4A.
I changed the format of audio files on the WMA. This format is more convenient for processing. Now my media player gives an error. How to find out what audio file formats are available to my MediaPlayer
B4X:
MediaPlayer1.Load(File.DirAssets, "v_bliz0.wma")
MediaPlayer1.SetVolume(0.9, 0.9)
MediaPlayer1.Play