Found from: https://wiki.debian.org/ALSA

1. Remove all pulse packages via Synaptic

2. Remove pulseaudio config files

rm -r ~/.config/pulse/*

3. Re-install alsa-packages and start alsa

sudo apt-get --reinstall install libasound2 libasound2-plugins alsa-utils alsa-oss alsamixergui apulse alsa-firmware-loaders

sudo alsactl init

4. Test sound

aplay /usr/share/sounds/alsa/Noise.wav

PS. Skype conferense does not work in antiX if pulseaudio is installed!