Brisbane City Council's use of loud music to move on rough sleepers in public spaces such as King George Square has come under question, with calls for a more "compassionate" approach.

In the council's Tuesday afternoon chamber meeting, Greens councillor Jonathan Sri asked lord mayor Adrian Schrinner how it was "compassionate" to force homeless people out of public spaces with loud music and voices.

The upper deck of King George Square where classical music is blasted to curb "antisocial" behaviour. Credit:Lydia Lynch.

The council plays loud classical music at night between midnight and 6am to discourage people from sleeping in the square, a practice started in 2012 under the LNP administration.

"How do you justify this decision to force vulnerable people out of a public space when they are seeking shelter?" Cr Sri asked, the second time he has raised the issue.