linux-amd64-chroot-netjack

Tags: jackd amd64 chroot

Intro

I was getting bored about not being able to run vst and asio stuff under gentoo amd64. There's an hardcore way to have things running : a 32 bits chrooted environment that will connect to 64 bits apps through netjack.

Setup a 32 bits chroot env according to :
http://www.gentoo.org/proj/en/base/amd64/howtos/chroot.xml

Intro
Inside the chroot
Outside the chroot
Tips
Links

Inside the chroot

make.conf inside the chroot

make.conf example inside the chroot
CFLAGS="-O2 -march=athlon-xp -msse2 -pipe -fomit-frame-pointer"
CHOST="i686-pc-linux-gnu"
CXXFLAGS="${CFLAGS}"
MAKEOPTS="-j2"

USE="alsa netjack oss X jack lash"

VIDEO_CARDS="vesa"

ALSA_PCM_PLUGINS="adpcm alaw asym copy dmix dshare dsnoop empty extplug file \
hooks iec958 ioplug ladspa lfloat linear meter mulaw multi null plug rate route \
share shm softvol" 

PORTDIR_OVERLAY="/usr/portage/local/layman/pro-audio/"

/etc/modules.d/alsa inside the chroot

I had to copy /etc/modules.d/alsa from the main system or get rid of some errors

emerge layman and world

emerge layman and configure it 
# emerge layman

add the pro-audio overlay
http://proaudio.tuxfamily.org/

update all
# emerge --sync && emerge --newuse --deep world

install required software (lots of time and dependancies) fst
# emerge jack-audio-connection-kit wineasio fst qjackctk

launch jackd

# jackd -R -p128 -dalsa -dhw:0 -r44100 -p1024 -n2
jackd 0.103.0
Copyright 2001-2005 Paul Davis and others.
jackd comes with ABSOLUTELY NO WARRANTY
This is free software, and you are welcome to redistribute it
under certain conditions; see the file COPYING for details

JACK compiled with System V SHM support.
loading driver ..
apparent rate = 44100
creating alsa driver ... hw:0|hw:0|1024|2|44100|0|0|nomon|swmeter|-|32bit
control device hw:0
configuring for 44100Hz, period = 1024 frames, buffer = 2 periods
ALSA: final selected sample format for capture: 32bit little-endian
ALSA: use 2 periods for capture
ALSA: final selected sample format for playback: 32bit little-endian
ALSA: use 2 periods for playback

# jacknet_client -p localhost
JACK tmpdir identified as [/var/run/jack]
engine sample rate: 8000
Packet Miss: (expected: 8236, got: -1) framecnt=0
Packet Miss: (expected: 8236, got: -1) framecnt=0
[...]
sync = 1 (when the connection with outside is OK)


# launch lashd
lashd &

# launch fst with a vst_plugin
fst Crystal.dll 
yo... lets see...
JACK tmpdir identified as [/var/run/jack]
lash_init: Not attempting to start daemon server automatically
Created project project-1 in directory /root/audio-projects/project-1
Added client 9c9cb7a0-addd-4135-8a9e-6d127a63dc5c of class Crystal to project project-1
Client 9c9cb7a0-addd-4135-8a9e-6d127a63dc5c set its name to 'Crystal'

# launch qjacktl
qjackctl &

Outside the chroot

launch jackd outside the chroot

$ jackd -d net
jackd 0.103.0
Copyright 2001-2005 Paul Davis and others.
jackd comes with ABSOLUTELY NO WARRANTY
This is free software, and you are welcome to redistribute it
under certain conditions; see the file COPYING for details

JACK compiled with System V SHM support.
loading driver ..
creating net driver ... net_pcm|48000|1024|3000|2|2|transport_sync:1
Waiting for an incoming packet !!!

*** IMPORTANT ***
Dont connect a client to jackd until the driver is attached to a clock source !!!