Songs can be recorded at different sound levels. It is necessary to "smooth out" their volume to ensure a pleasant listening. The Radio Manager integrates a simple normalization, which can smooth out small differences.
It can be activated under Settings > Broadcasting in your Radio Manager.
You can enter a value between -100 dB (total silence) and 0 dB (max level, default). The sound level of your broadcast will be aligned with the value you choose.