+ PKG_PATH=/nfs/packages/NetBSD/trunk/x86_64/All /usr/tools/sbin/pkg_add -K /usr/pkg/pkgdb digest-20220214 libtool-base-2.4.7nb1 mktools-20220614 gmake-4.4 pkgconf-1.9.4 cwrappers-20220403 checkperms-1.12 mpg123-1.31.2 jack-1.9.21nb1
pkg_add: package `mktools-20220614' already recorded as installed
gmake-4.4: registering info file /usr/pkg/info/make.info
pkg_add: package `cwrappers-20220403' already recorded as installed
libffi-3.4.4: registering info file /usr/pkg/info/libffi.info
fftw-3.3.10nb1: registering info file /usr/pkg/info/fftw3.info
===========================================================================
$NetBSD: MESSAGE.NetBSD,v 1.3 2021/09/08 19:19:19 nia Exp $

To start JACK on NetBSD:

$ jackd -Sr -d sun

If you have an external USB mic:

$ jackd -Sr -d sun -P /dev/audio -C /dev/audio1 -i 1

===========================================================================