Sound lags while switching consoles

Please help me! I needed a good console music player, and I quite liked moc, but it lags about 2-3 seconds each time i switch a console (Alt-F#).

I tried setting up ALSA as a default output, increasing output and input buffers, and it still lags. Please help me with this problem.
The OS is Ubuntu 9.04 x86_64.
The version of MOC is 2.5.0-alpha3, the one downloaded from the repository.