====== firefly ======
for jack applications
<code>
PIPEWIRE_LATENCY="128/48000" pw-jack jack_delay

</code>
https://linuxmusicians.com/viewtopic.php?t=23539
https://linuxmusicians.com/viewtopic.php?t=25556

change defaults in 
<code>
 cat pipewire.conf | grep 256
    default.clock.quantum       = 256

</code>