Amazon has been selling what appear to be <i>insanely high</i> v0 mp3s for years now. Of course, there&#x27;s no way to know for sure. This is what they claim &quot;Where possible, we encode our MP3 files using variable bit rates for optimal audio quality and file sizes, aiming at an average of 256 kilobits per second (kbps)&quot; but the bit rates suggest <i>insane</i> v0 to me.