FS#13062 - ogg vorbis codec and eq (bass noise)
Create silence in Audacity program (Generate → Silence). Convert the wav file to ogg vorbis file. Put into the sansa clip+ player wav and Ogg files. Turn on the equalizer and set 32 hz, 64 hz, 125 hz in the 0.5-2.0.
Turn on maximum volume. Listen to the silence of wav file. Absolute silence. Listen Ogg Vorbis file - hear the noise (like the wind). It’s bug with only ogg vorbis. mp3, flac, mp4 is absolute silence.
On a musical files it’s additional noise. Ogg vorbis is economical of disk space. Testing on a sansa clip+ with 2GB.