File asound-pulse.conf of Package alsa-plugins
# PulseAudio plugin configuration
# Let's create a virtual device "pulse" for mixer and PCM
pcm.pulse {
type pulse
}
ctl.pulse {
type pulse
}
# Let's make it the default!
pcm.!default {
type plug
slave.pcm {
type pulse
}
}
ctl.!default {
type pulse
}