I have lately been converting audio cassettes to digital sound, using Audacity. I am successful with many of them, but I encounter a peculiar problem during some of these conversions, that no web search has helped me to counter.
Specifically, when played from an Android device, the sound from the exported mp3 or ogg file, be it variable or constant bit rate (for mp3), is muffled. The same mp3 or ogg sound file sounds just fine when played from a computer. I have tried to play the file with vlc for android, and also an uploaded video version with the Youtube app, in Android 4.0 and 4.2, with phones of different brands.Furthermore, the sound file that is distorted when played from the smartphone, sounds perfectly when heard through earphones, headphones,speakers - anything connected to the audio-out port of the phone. However, installing an app such as SoundAbout does not fix the problem, even after routing the sound through the speakers with the earphones plugged in. I have uploaded a sample Audacity project having the problem here: