instagram on dual screen

January 6, 2017

Instagram filter used: Willow

Tearing of fast action on NVIDIA

January 5, 2017

So with a brand new setup that includes a GLX/Geforce 1070 graphic card (will I ever be able to abuse all that GPU power?) I was somehow dissapointed to find non-uniform flickering, in other words the fast movement of things on screen was tearing. I didn’t prioritize this problem yet, but today I took time to look into it, and the following recipe solved it:

To avoid tearing, there’s a “workaround” – there are two options that seemingly need to be enabled in Xorg/nvidia driver: TripleBuffering and ForceCompositionPipeline (or ForceFullCompositionPipeline). My /etc/X11/xorg.com now contains the following in the “Screen” section:

Option    "TripleBuffer" "1"
Option    "metamodes" "HDMI-0: 1920x1080_60 +0+0 { ForceCompositionPipeline = On }, DVI-D-0: 1920x1080_60 +1920+0 { ForceCompositionPipeline = On }"

1 2	Option "TripleBuffer" "1" Option "metamodes" "HDMI-0: 1920x1080_60 +0+0 { ForceCompositionPipeline = On }, DVI-D-0: 1920x1080_60 +1920+0 { ForceCompositionPipeline = On }"

To find out what is your screens layout, you can do

xrandr | grep " connect"

1	xrandr \| grep " connect"

Also, if you want to fix tearing temporarily without changing any configuration files, use this command with something like that:

nvidia-settings --assign CurrentMetaMode="DVI-I-1: 1920x1200 { ForceCompositionPipeline = On }"

1	nvidia-settings --assign CurrentMetaMode="DVI-I-1: 1920x1200 { ForceCompositionPipeline = On }"

Supposedly forcing composition pipeline is causing some degradation in quality/speed in games.

Sources:
https://devtalk.nvidia.com/default/topic/543305/linux/screen-video-tearing-gtx6xx-7xx-kepler-9xx-maxwell-in-almost-all-applications-including-desktop/1
http://http.download.nvidia.com/XFree86/Linux-x86/325.15/README/configtwinview.html
https://forums.freebsd.org/threads/52311/#post-312833
https://forums.freebsd.org/threads/52311/#post-325927
http://us.download.nvidia.com/XFree86/Linux-x86_64/319.32/README/xconfigoptions.html

instagram: An important design decision

December 27, 2016

Instagram filter used: Inkwell

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Learning SuperCollider patterns: legato, sustain and using pairs

December 24, 2016

Yesterday I had problems understanding why does a SynthDef and it’s Synth instance complain when it’s envelope duration is shorter than duration \dur. The following code will produce FAILURE IN SERVER /n_set Node 1067 not found complaints in the post window.

// an example of undefined sustain resulting in FAILURE IN SERVER
( // define a simple synth
SynthDef(\bip, { |out=0, freq=440, gate=1, amp=0.3|
    var sig, env;
	env = Env.linen(0.01, 1, 0.1);
	sig = Pulse.ar(freq, 0.3) * EnvGen.kr(env, gate, doneAction:2);
    Out.ar(out, sig * amp);
}).add;
)
( // define a simple pattern
Pbind(
	\instrument, \bip,
	\degree, Pseq([0, 2, 3], inf),
	\dur, Pseq([1, 2], inf)
).play;
)

// an example of undefined sustain resulting in FAILURE IN SERVER

( // define a simple synth

SynthDef(\bip, { |out=0, freq=440, gate=1, amp=0.3|

var sig, env;

env = Env.linen(0.01, 1, 0.1);

sig = Pulse.ar(freq, 0.3) * EnvGen.kr(env, gate, doneAction:2);

Out.ar(out, sig * amp);

}).add;

)

( // define a simple pattern

Pbind(

\instrument, \bip,

\degree, Pseq([0, 2, 3], inf),

\dur, Pseq([1, 2], inf)

).play;

)

The sound will be generated fine, but the problem is that the doneAction and sustain value in Env.linen result in the Synth instance being freed before Pbind does it. So when Pbind does tries to free it, it’s already gone, it doesn’t exist anymore.

I asked nice SC people on SC FB group and the answer led me to understand that there’s a good use of\sustain parameter in Pbind, which deals with exactly that. So to properly control sustain time, an example shows how it can be done:

(
SynthDef(\beeps, {
	arg amp = 0.8, gate = 1, sustain = 1, release = 0.3, freq = 440;
	var sig, env;

	env = Env.linen(attackTime:0.01, sustainTime: sustain, releaseTime: release);
	sig = Pulse.ar([freq,freq*0.001], 0.5) * amp * EnvGen.kr(env, gate, doneAction:2);

	Out.ar(0, sig * amp);
}).add
)

(
Pdef(\beepsin,
	Pbind(
		\instrument, \beeps,
		[\degree, \dur], Pseq([[0, 0.5], [2, 0.1], [3, 0.1], [2, 0.1], [5, 1], [Rest, Rest]], inf),
		//\sustain, 0.1,
		//\legato, 0.05,
		\release, 0.1,
		\amp, 0.1
	));
)

Pdef(\beepsin).play;

(

SynthDef(\beeps, {

arg amp = 0.8, gate = 1, sustain = 1, release = 0.3, freq = 440;

var sig, env;

env = Env.linen(attackTime:0.01, sustainTime: sustain, releaseTime: release);

sig = Pulse.ar([freq,freq*0.001], 0.5) * amp * EnvGen.kr(env, gate, doneAction:2);

Out.ar(0, sig * amp);

}).add

)

(

Pdef(\beepsin,

Pbind(

\instrument, \beeps,

[\degree, \dur], Pseq([[0, 0.5], [2, 0.1], [3, 0.1], [2, 0.1], [5, 1], [Rest, Rest]], inf),

//\sustain, 0.1,

//\legato, 0.05,

\release, 0.1,

\amp, 0.1

));

)

Pdef(\beepsin).play;

It seems like the most important part is that the SynthDef has a sustain argument. Pbind will calculate sustain from \dur so that it doesn’t even have to be defined in the Pbind.

There’s a nice thing used above, which I was looking for a while – how to defined note and it’s duration in pairs instead of on separate lines for each parameter: [\degree, \dur] and what follows is a list of pairs.

instagram: A new release via Kamizdat is coming out today

December 22, 2016

Instagram filter used: Normal

View in Instagram ⇒

instagram: Acid lines on delay, fifths and more

December 22, 2016

Instagram filter used: Inkwell

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Interface Fractures IF4Q

December 20, 2016

Interface Fractures is a series of audiovisual explorations Luka Prinčič has been developing in collaboration with the Slovenian Cinematheque since 2013. The series’ cinema-sound episodes share the same method and format: an immersive situation in the darkness of the cinema, the use of digital and open source tools for generating image and sound, a dichotomy between fixed composition and improvisation in time, a tendency for abstraction out of which fragments of the concrete arise, and playing with the synchronisation of sound and image. Although the creation process includes an examination of the contemporary human condition, conventional narration is not so important in the created performances and remains in the background. Interface Fractures is thus a fragmented excursion into abstract sound and the moving picture. Their synthetic integration emerges from the process of searching for fractures and subjectivities in a seeming impenetrability of polished and polarised interfaces – mediated, inter-machinic, interhuman.

Collaborators

Author: Luka Prinčič

Support

Production: Emanat – (emanat.si/en/production/luka-princic–interface-fractures-if4q)
Co-production: Slovenska kinoteka
Financial support: City Municipality Ljubljana, Ministry of Culture RS

Technical

Technical rider -> https://goo.gl/VAIHtq

Events

31.05.2017 at 21:00, 2017 – Community, Stadtwerkstadt, Linz, AT
02.02.2017, MENT, Pritličje, Ljubljana, SI
20.01.2017, Cirkulacija, Ljubljana, SI
20.12.2016, Slovenska kinoteka, Ljubljana, SI (odpade/cancelled)

Video

Save

linux: auto-login

December 14, 2016

There’s couple of ways how to setup auto-login on linux. This one is geeky and not very user-friendly, but might come handy to somebody. This is on Ubuntu Linux 14.04.1/trusty with graphical login/desktop manager (lightdm) disabled.

install mingetty

 $ sudo apt-get install mingetty

1	$ sudo apt-get install mingetty

edit /etc/init/tty1.conf so that it looks like this:

# tty1 - getty
#
# This service maintains a getty on tty1 from the point the system is
# started until it is shut down again.

start on stopped rc RUNLEVEL=[2345] and (
            not-container or
            container CONTAINER=lxc or
            container CONTAINER=lxc-libvirt)

stop on runlevel [!2345]

respawn
#exec /sbin/getty -8 38400 tty1
exec /sbin/mingetty --autologin <YOUR USERNAME HERE> tty1

# tty1 - getty

# This service maintains a getty on tty1 from the point the system is

# started until it is shut down again.

start on stopped rc RUNLEVEL=[2345] and (

not-container or

container CONTAINER=lxc or

container CONTAINER=lxc-libvirt)

stop on runlevel [!2345]

respawn

#exec /sbin/getty -8 38400 tty1

exec /sbin/mingetty --autologin <YOUR USERNAME HERE> tty1

The most important part are the last three lines. Change username to what you have.

Edit your ~/.profile and add at the bottom:

if [ -z "$DISPLAY" ] && [ -n "$XDG_VTNR" ] && [ "$XDG_VTNR" -eq 1 ]; then
	startx
fi

if [ -z "$DISPLAY" ] && [ -n "$XDG_VTNR" ] && [ "$XDG_VTNR" -eq 1 ]; then

startx

Reboot and you should end up in your X session.

Sources:
askubuntu.com/quest…unning-upstart
https://wiki.archlinux.org/index.php/Xinit

instagram: a little plan

December 14, 2016

Instagram filter used: Normal

Photo taken at: Prekomorci

View in Instagram ⇒

instagram: December – such a suckoh

December 13, 2016

Instagram filter used: Inkwell

Photo taken at: Prekomorci

View in Instagram ⇒

supercollider: easy beats with patterns

December 13, 2016

///////////////// some easy beats, yo!
(

// somekind of highhat - enveloped whitenoise
SynthDef(\highhat, { | amp,freq,release |
	var env, sig;

	env = Env.perc(0.001,release);
	sig = WhiteNoise.ar(EnvGen.kr(env, doneAction: 2));
	sig = HPF.ar(sig, freq:freq);
	sig = Splay.ar(sig);
	sig = sig * amp;

	Out.ar(0,sig);
}).add;


// bass kick
SynthDef(\kicker, {
	var sig, env;

	env = Env.perc(0.01, 2, 1);
	sig = LFPar.ar(
		freq:50,
		mul: EnvGen.kr(env, doneAction: 2)
	) * 10;
	sig = Splay.ar(sig.distort * 0.5);

	Out.ar(0, sig);
 }).add;


~oscBridge = NetAddr.new("127.0.0.1", 12000);


h = Pbind(
	\dur, Pseq([ 4, 4, 4, 4, 2, 2, 4, 4, 2, 1, 1 ], inf),
	\instrument, \highhat,
	\amp, Pseq([ 1, 0.9, 1, 0.5, 1, 0.9, 0.2, 0.9,     1, 0.6, 1          ], inf),
	\freq, Pseq([9000,8000,7000,1000], inf),
	\release, Pseq([0.07, 0.09, 0.06, 0.2, 1], inf),
).play(quant:32);

k = Pbind(
	\instrument, \kicker,
	\dur, 32
).play(quant:32);

TempoClock.default.tempo = 100/6;


) ////////////////////////////////////////////////////////////////////////////

///////////////// some easy beats, yo!

(

// somekind of highhat - enveloped whitenoise

SynthDef(\highhat, { | amp,freq,release |

var env, sig;

env = Env.perc(0.001,release);

sig = WhiteNoise.ar(EnvGen.kr(env, doneAction: 2));

sig = HPF.ar(sig, freq:freq);

sig = Splay.ar(sig);

sig = sig * amp;

Out.ar(0,sig);

}).add;

// bass kick

SynthDef(\kicker, {

var sig, env;

env = Env.perc(0.01, 2, 1);

sig = LFPar.ar(

freq:50,

mul: EnvGen.kr(env, doneAction: 2)

) * 10;

sig = Splay.ar(sig.distort * 0.5);

Out.ar(0, sig);

}).add;

~oscBridge = NetAddr.new("127.0.0.1", 12000);

h = Pbind(

\dur, Pseq([ 4, 4, 4, 4, 2, 2, 4, 4, 2, 1, 1 ], inf),

\instrument, \highhat,

\amp, Pseq([ 1, 0.9, 1, 0.5, 1, 0.9, 0.2, 0.9, 1, 0.6, 1 ], inf),

\freq, Pseq([9000,8000,7000,1000], inf),

\release, Pseq([0.07, 0.09, 0.06, 0.2, 1], inf),

).play(quant:32);

k = Pbind(

\instrument, \kicker,

\dur, 32

).play(quant:32);

TempoClock.default.tempo = 100/6;

) ////////////////////////////////////////////////////////////////////////////

minor random bliss in two

December 12, 2016

Learning Patterns in SuperCollider, here’s a little lullaby:

(

SynthDef(\param, { arg freq = 100, sustain, amp;
	var sig;
    sig = LFPar.ar(freq: freq,
        mul: EnvGen.kr(Env.perc(0, sustain, 0.5), doneAction:2) * amp);
	sig = Splay.ar(sig);
	Out.ar(0, sig);
}).add;

e = Pbind(
	\midinote, Prout({
		var tone0, tone1, tone2, interval, freq0, delta;
		loop {
			tone0 = rrand(0,11);
			interval = rrand(2,4);
			tone1 = Scale.minor(\pythagorean).at(tone0) + [0,12,24].choose + 0.07;
			tone2 = Scale.minor(\pythagorean).at(tone0 + interval) + [0,12,24].choose;
			freq0 = [tone1,tone2]+48;
			postln(freq0);
			freq0.yield;
		}
	}),
    \dur, Prand([1,2,4,8,12,16,4,6,8], inf),
    \instrument, \param,
	\amp, 0.5,
	\sustain, 1,
).play(quant:1); // returns an EventStream
TempoClock.default.tempo = 200/60;

)

(

SynthDef(\param, { arg freq = 100, sustain, amp;

var sig;

sig = LFPar.ar(freq: freq,

mul: EnvGen.kr(Env.perc(0, sustain, 0.5), doneAction:2) * amp);

sig = Splay.ar(sig);

Out.ar(0, sig);

}).add;

e = Pbind(

\midinote, Prout({

var tone0, tone1, tone2, interval, freq0, delta;

loop {

tone0 = rrand(0,11);

interval = rrand(2,4);

tone1 = Scale.minor(\pythagorean).at(tone0) + [0,12,24].choose + 0.07;

tone2 = Scale.minor(\pythagorean).at(tone0 + interval) + [0,12,24].choose;

freq0 = [tone1,tone2]+48;

postln(freq0);

freq0.yield;

}

}),

\dur, Prand([1,2,4,8,12,16,4,6,8], inf),

\instrument, \param,

\amp, 0.5,

\sustain, 1,

).play(quant:1); // returns an EventStream

TempoClock.default.tempo = 200/60;

)

Luka Prinčič

sound, noise, music & new media

instagram on dual screen

Tearing of fast action on NVIDIA

instagram: An important design decision

Learning SuperCollider patterns: legato, sustain and using pairs

instagram: A new release via Kamizdat is coming out today

instagram: Acid lines on delay, fifths and more

Interface Fractures IF4Q

Collaborators

Support

Technical

Events

Video

linux: auto-login

instagram: a little plan

instagram: December – such a suckoh

supercollider: easy beats with patterns

minor random bliss in two

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