modifying tags in batch

[monkey]

is it possible to modify a lot of tag with a command
either in Musicbee either with another soft ?
for example
copy the parameter "custom 1" in grouping ?

[purplebee]

You can do that in MB using this plugin: https://getmusicbee.com/forum/index.php?topic=3833.0

[monkey]

Super thanks
very good plugin, very easy to use...