Apply ReplayGain ReplayGain is a method of measuring loudness of audio tracks and altering the overall loudness, enabling tracks from different albums to have the same volume levels (modern popular albums are much louder than an album from the 1980's). ReplayGain requires that the audio tracks have an embedded ReplayGain ID Tag (dBpoweramp is able to add this tag to files, install dBpoweramp and the ReplayGain utility codec from Codec Central on dbpoweramp.com, then run the program 'Batch Converter', select the main audio folder (normally Music) and select Convert >> choose the encoder the [ReplayGain]. This method only scans the files and adds ReplayGain values, the audio is left untouched).
Only tracks which are streamed (in a format other than 'as is') would have replaygain applied. If the player supports 24 bit audio then enable this option as it allows ReplayGain adjustments without any loss of bit depth when playing 16 bit tracks, also set the Active and Inactive pre-amp to -3 dB.