Advanced Gtk+ Sequencer
Advanced GTK+ Sequencer is intended to use for music composition. It features a piano roll, as well a synth, matrix editor, drum machine, soundfont2 player, mixer and an output panel. It's designed to be highly configurable, you may add effects to its effect chain, add or remove audio channels/pads. You may set up a fully functional network of engines, therefore exists a link editor for linking audio lines.
The following command install's development dependencies on debian GNU/Linux and related.
apt-get install make gcc autoconf automake pkg-config libwebkit2gtk-4.0-dev libgstreamer1.0-dev libgstreamer-plugins-base1.0-dev gstreamer1.0-plugins-good gstreamer1.0-plugins-bad libgtk-3-dev libinstpatch-dev libsndfile1-dev libsamplerate0-dev libxml2-dev ladspa-sdk dssi-dev lv2-dev libfftw3-dev libasound2-dev libjack-jackd2-dev libpulse-dev libsoup2.4-dev uuid-dev libcunit1-dev gtk-doc-tools pulseaudio cmt swh-lv2 invada-studio-plugins-lv2 calf-plugins fluid-soundfont-gm hydrogen-drumkits libxtst-dev
The following command install's development dependencies on openSUSE Linux Leap15.1.
zypper install gcc automake autoconf libtool glibc-devel pthread-stubs-devel pcre-devel libuuid-devel gettext-devel fftw3-devel libsndfile-devel libsamplerate-devel libinstpatch-devel alsa-devel libpulse-devel libjack-devel ladspa-devel dssi-devel lv2-devel gobject-introspection atk-devel gtk-doc glib2-devel cairo-devel gdk-pixbuf-devel pango-devel gtk3-devel webkit2gtk3-devel cunit-devel
To compile Advanced Gtk+ Sequencer issue the following in the source directory:
./configure --prefix=/usr make make install
The following command install's development dependencies on FreeBSD with binary package management.
pkg install dssi lv2 docbook-xsl desktop-file-utils gettext-tools gmake gtk-update-icon-cache libxslt pkgconf shared-mime-info gcc9 binutils libX11 alsa-lib fftw3 fontconfig freetype2 libinstpatch libsamplerate libsndfile libsoup e2fsprogs-libuuid webkit2-gtk3gettext-runtime cairo gdk-pixbuf2 glib gtk3 libxml2 pango
To compile Advanced Gtk+ Sequencer on FreeBSD issue the following in the source directory:
MAKE="gmake" LDFLAGS="-L/usr/lib -L/usr/local/lib" ./configure --prefix=/usr/local --disable-alsa --enable-oss --disable-pulse --disable-jack --disable-introspection gmake gmake install
Using with Systemd or PulseAudio
Most annoying is when don't get desired performance. To maximise throughput you might be interestend in running GSequencer using
systemd-run and disable accounting:
systemd-run -p CPUAccounting=false -p MemoryAccounting=false -p TasksAccounting=false -p IOAccounting=false -p BlockIOAccounting=false --scope gsequencer
PulseAudio may have it's disadvantages, too. It's alsa emulation should work thought but to disable pulseaudio temporally invoke.
pasuspender -- gsequencer
Or stop PulseAudio completely.
systemctl --user stop pulseaudio systemctl --user stop pulseaudio.socket killall pulseaudio
You probably want to modify preallocated buffer size of your audio device. Card0 is your very first soundcard within your system and pcm0p is first playback device. This one-liner modifies the preallocated buffer size by echoeing 8192 to the virtual file prealloc.
echo 8192 > /proc/asound/card0/pcm0p/sub0/prealloc
Realtime-Kernel with full dyn-ticks and performance governor
It is recommended to use a realtime kernel in order to get most out of GSequencer. Below I show you how to compile linux-4.6.5-rt10 from source code. But first install some build dependencies:
apt-get install cpio zlib1g-dev libssl-dev libncurses-dev
Now we are ready to download kernel source, patch it and run `make menuconfig` once.
cd /usr/src wget -c http://www.nongnu.org/gsequencer/config-4.6.5-rt10 wget -c https://www.kernel.org/pub/linux/kernel/v4.x/linux-4.6.5.tar.gz wget -c https://www.kernel.org/pub/linux/kernel/projects/rt/4.6/patch-4.6.5-rt10.patch.gz gunzip patch-4.6.5-rt10.patch.gz tar -xzf linux-4.6.5.tar.gz cd linux-4.6.5 cat ../patch-4.6.5-rt10.patch | patch -p1 make mrproper
Copy the modular kernel configuration in place.
cp -v ../config-4.6.5-rt10 .config make menuconfig
Alternatively you might want to get an optimized kernel configuration (recommended) instead above. Note you have to enable real-time configuration yourself.
make localmodconfig make menuconfig
We have patched and a working kernel configuration so far. We are able to build the kernel, yet. Then we are ready build the debian package. Alternatively you may consider this build procedure using kernel-package to do a debian package.
The mkinitramfs script can be optained from beyond linux from scratch
export MAKEFLAGS="-j 5" make make modules_install cp arch/x86_64/boot/bzImage /boot/vmlinuz-4.6.5-rt10 cp .config /boot/config-4.6.5-rt10 cp System.map /boot/System.map-4.6.5-rt10 cd /boot mkinitramfs 4.6.5-rt10
Congratulations! You're done and ready to reboot. Note might be you have to update your bootloader.
Here's an example how actual config might look like. Note it changes from time to time and should be manually updated. You may use the preferences dialog to do so.
This file is usually located in $HOME/.gsequencer/ags.conf or embedded in your XML project file.
[generic] disable-feature=experimental autosave-thread=false segmentation=4/4 engine-mode=deterministic rt-safe=false [soundcard-0] backend=alsa capability=playback buffer-size=1024 pcm-channels=2 format=16 samplerate=44100 device=default [recall] auto-sense=true [thread] model=super-threaded super-threaded-scope=audio lock-global=ags-thread lock-parent=ags-recycling-thread thread-pool-max-unused-threads=16 max-precision=125 [osc-server] auto-start=false any-address=false enable-ip4=false ip4-address=127.0.0.1 enable-ip6=false ip6-address=::1 server-port=9000 monitor-timeout=0.033333
Here's an example how actual priority config might look like. Note it changes from time to time and should be manually updated. This file applies to version 2.4.2 and later.
See `man -s2 sched_setscheduler` for further information. This file is usually located in $HOME/.gsequencer/priority.conf
The value 0 disables RT priorities set by the application.
[rt-thread] libags=45 server-main-loop=45 audio-main-loop=45 audio=45 osc-server-main-loop=45 gui-main-loop=15
Last modified: Sat Mar 02:09:54 UTC 2021 by joelkraehemann