How do I prevent Quod Libet from locking the audio device?
If you use ALSA, you can enable ALSA dmix to have ALSA mix in software. In ALSA 1.0.9rc2 and higher this is enabled by default for soundcards that don’t support hardware mixing. You can have other OSS apps use ALSA with the `aoss wrapper supplied in the `alsa-oss` package (so they can share the audio device with Quod Libet). For older versions of Debian, you can enable dmix by copying `/usr/share/doc/libasound2/examples/asound.conf_dmix` to `~/.asoundrc`. See [http://alsa.opensrc.org/index.php?page=DmixPlugin the ALSA dmix guide] for more information.