Jacktrip running on PiKVM / Raspberry Pi with arch distro

install.sh

#!/bin/bash

# Check if script is running as root
if [ "$EUID" -ne 0 ]
  then echo "Please run as root"
  exit
fi

# your personal machine running jacktrip
REMOTE_JACK_SERVER=nat.local
# change to any name to identify this jacktrip client
JOB_NAME=J1
BUFFER_SIZE=1024
# -d hw:1,0 for pikvm v3 hat
# -d hw:0,0 for others
AUDIO_DEVICE=-d hw:1,0

pacman -Syu
pacman -S --needed jack2 jacktrip njconnect jack-example-tools

# Checking if user 'jacktrip' already exists
if id "jacktrip" &>/dev/null; then
    echo "User 'jacktrip' already exists. Skipping user creation."
else
    useradd -M -r jacktrip -G audio
fi

cat > /etc/systemd/system/jack.conf <<EOF
JACK_NO_AUDIO_RESERVATION=1
JACK_OPTS=-d alsa $AUDIO_DEVICE -r 44100 -p $BUFFER_SIZE
JACKTRIP_OPTS=-C $REMOTE_JACK_SERVER -n 1 --remotename $JOB_NAME
EOF

cat > /etc/systemd/system/jackd.service <<EOF
[Unit]
Description=jackd
After=sound.target
[Service]
User=jacktrip
Type=simple
LimitRTPRIO=infinity
LimitMEMLOCK=infinity
LimitRTTIME=infinity
EnvironmentFile=/etc/systemd/system/jack.conf
ExecStart=/usr/bin/jackd \$JACK_OPTS
Restart=always
RestartSec=2s
[Install]
WantedBy=multi-user.target
EOF

cat > /etc/systemd/system/jacktrip.service <<EOF
[Unit]
Description=jacktrip
Requires=jackd.service
After=network.target jackd.service
[Service]
User=jacktrip
Type=simple
LimitRTPRIO=infinity
LimitMEMLOCK=infinity
LimitRTTIME=infinity
EnvironmentFile=/etc/systemd/system/jack.conf
ExecStartPre=jack_wait -w -t 5
ExecStart=/usr/bin/jacktrip \$JACKTRIP_OPTS
Restart=always
RestartSec=2s
[Install]
WantedBy=multi-user.target
EOF

systemctl daemon-reload

systemctl enable jackd.service
systemctl enable jacktrip.service

systemctl start jackd.service
systemctl start jacktrip.service

I hope this helps someone else as well.

I did all of the above, services are enable and I have a connection from peer, I can also connect the inputs and outputs through qjackctl on my macbook.
BUT, I had zero sound coming through, neither in nor output.

I finally figured it out: With my PiKVM v4 I needed to set the AUDIO_DEVICE setting in the jack.conf:
AUDIO_DEVICE=-d hw:1,0 to AUDIO_DEVICE=-d hw:0,0 <-- 0,0 instead 1,0