[m45t3r]

> has a massive latency.

The trade-off for latency in PA is lower power usage. I think most consume users are pretty happy that their sound system does not suck tons of energy just to offer sub-10ms of audio latency.

> JACK

AFAIK, PulseAudio and Jack 2 can work pretty seamlessly together thanks to a new dbus API (https://wiki.archlinux.org/index.php/PulseAudio/Examples#Pul...).

[AstralStorm]

Mostly, but you will need a tuned kernel setup to have JACK working properly as in no random underruns.