How to start jack on .xinitrc or i3/startup?

[nettoyoussef]

Hi all,

I have read the guide on the Arch Wiki, and several others, also including the source code of Cadence.

I've tried to create the following script for initializing Jack, with a bridge from Alsa -> PulseAudio -> Jack.

It works when not used on startup, but don't when initialized on the I3 configuration or the .xinitrc.

Do you know what I am doing wrong?

Jack Initialization:

#/bin/sh

# Functions
IsJackRunning()
{
    PROCESS=`ps -u $USER | grep jack`
    if [ "$PROCESS" == "" ]; then
        false
    else
        true
    fi
}

IsPulseAudioRunning()
{
    PROCESS=`ps -u $USER | grep pulseaudio`
    if [ "$PROCESS" == "" ]; then
        false
    else
        true
    fi
}

# script

# Check if Jack is running
if (IsJackRunning); then
{
  jack_control exit
  killall -9 jackdbus
  echo "Done"
}
fi

# Check if PulseAudio is running
if (IsPulseAudioRunning); then
{
  pulseaudio -k
  echo "Done"
}
fi

# remove existing jack configuration 
rm -f ~/.config/jack/conf.xml

# Jack configuration
jack_control ds alsa
jack_control dps device hw:II24071480
jack_control dps rate 48000
jack_control dps nperiods 2
jack_control dps period 256
jack_control start
sleep 2
#a2j_control --ehw
#a2j_control --start
#sleep 2

# Load pulse audio config
FILE=~/.config/pulse/config
pulseaudio --daemonize --high-priority --realtime --exit-idle-time=-1 --file=$FILE -n
sleep 2

# Create connections
jack_connect 'system:capture_1' 'PulseAudio JACK Source:front-left'
jack_connect 'system:capture_2' 'PulseAudio JACK Source:front-right'
jack_connect 'PulseAudio JACK Sink:front-left'  'system:playback_1'
jack_connect 'PulseAudio JACK Sink:front-left'  'system:playback_7'
jack_connect 'PulseAudio JACK Sink:front-right' 'system:playback_2'
jack_connect 'PulseAudio JACK Sink:front-right' 'system:playback_8'

PulseAudio Initialization

~/.config/pulse/client.conf:

autospawn = no

~/.config/pulse/daemon.conf:

default-sample-format = float32le
realtime-scheduling = yes
rlimit-rttime = -1
exit-idle-time = -1

~/.config/pulse/config (used by the jack script to initialize pulseaudio):

#!/usr/bin/pulseaudio -nF

.fail
### Automatically restore the volume of streams and devices
load-module module-device-restore
load-module module-stream-restore
load-module module-card-restore

#### Load Jack modules
load-module module-jack-source channels=2 connect=0
load-module module-jack-sink channels=2 connect=0

### Load unix protocol
load-module module-native-protocol-unix

## Automatically restore the default sink/source when changed by the user
## during runtime
## NOTE: This should be loaded as early as possible so that subsequent modules
## that look up the default sink/source get the right value
load-module module-default-device-restore

### Make sure we always have a sink around, even if it is a null sink.
load-module module-always-sink

### Make Jack default
set-default-sink jack_out
set-default-source jack_in

Alsa configuration

~/.asoundrc

pcm.!default {
    type plug
    slave { pcm "pulse" }
}

pcm.pulse {
    type pulse
}

ctl.mixer0 {
    type hw
    card 0
}

[nettoyoussef]

To further clarify the issue, new programs connect directly to the system playback, instead of connecting on the Pulseaudio-Jack sink, then in the playback.
See the example below with mpv: