A minor cosmetic suggestion: Negative values of %__replaygain_*_*% could be prefixed with the correct minus character ($char(8722)) instead of the hyphen. The minus character has the same width as the plus character. The advantage would be that if user creates a column displaying ReplayGain values, positive and negative values would align perfectly. The hyphen is shorter, and negative values are shifted to the left by a few pixels, which creates a jittering effect when the playlist is scrolled. This is how it looks like, on the left the minus, on the right the hyphen:

If the display is customizable, then try this workaround: $replace(%source string%,-,$char(8722))

sweet...that is excellent.

just tested successfully in the Default UI.

[$replace(%__replaygain_track_gain%,-,$char(8722))]

[$replace(%__replaygain_album_gain%,-,$char(8722))]

works like a charm.

thanks to both of you, for the idea & for the solution!

btw, how do you remove the " dB" and right align the output?