Virtos Band Extrapolation [Click to enlarge] Synthesize high or low frequency harmonics to give life to dull recordings. The Band Extrapolation plug-in is suitable for post processing such as enhancing the often missing high frequencies in old recordings or increasing the perceived bass. Tip! MP3 recordings with low bitrate can be restored with the Band Extrapolation plugin (see the help files for further information). Features Synthesize high or low frequency harmonics to give life to dull recordings. Adjust mix ratio between low-frequency-, original- and high-frequency content. Use any of the factory presets for simple enhancement. Supports 24 bits / 96kHz. 32 bits internal processing for superior quality.