Some clips are recorded with too much volume making over modulation in broadcast distorting sound. A volume control on each cart could level out the decibels.
COMPLETE
"Individual QuickCart volume controls have been added in PlayIt Live 2.17 and PlayIt Cartwall 2.02 and can be enabled via Settings"
Comment on this feature request:
Mark Hawkins commented
This might be better fixed by using "MP3 Gain"
This is freeware at http://mp3gain.sourceforge.net/
Be careful with this and have a backup copy of all files !
Cameron Claassens commented
I would suggest Normalising tracks before loading them to the database. We normalise and use a compressor before loading to database to ensure all tracks are at same level. You can also use Audacity for this and set it to do a chain.