Search found 96 matches

by emarsk
Mon Aug 03, 2015 4:30 pm
Forum: System Tuning and Configuration
Topic: normal Linux kernels with threadirqs vs RT patchset
Replies: 18
Views: 10973

Re: normal Linux kernels with threadirqs vs RT patchset

I've been using the normal […] kernel with the threadirqs parameter on my laptop lately and it works great after setting my USB sound card to a higher IRQ priority. In my experience, the RT patched kernel is unstable and occasionally freezes during normal desktop use. I have the same experience (ex...
by emarsk
Wed Jul 29, 2015 8:17 pm
Forum: Linux Distributions & Other Software
Topic: Why people don't like Unity and Ubuntu?
Replies: 52
Views: 20079

Re: Why people don't like Unity and Ubuntu?

Nice flame fest. Let's join! :mrgreen: At the time I tried Ubuntu, what I didn't like was having every 6 months new broken "features" to fix. Maybe it's better now, I don't know, but honestly I don't care, because there are distros that I like more. Also, this bug has been quite a show stopper for m...
by emarsk
Fri Jul 24, 2015 2:53 pm
Forum: Plugins, Effects and Instruments
Topic: EBU R128 normalisation plugin?
Replies: 3
Views: 2982

Re: EBU R128 normalisation plugin?

Yes, to comply with EBU R128, you'll need to measure the whole audio segment and then normalize. So, while there's no plug-in that does the normalization step for you, it's trivial to do by hand. Also, if you're working in a DAW, you'd apply the "normalization" as a correction on the master fader, n...
by emarsk
Wed Jul 22, 2015 9:17 am
Forum: KXStudio Discussion
Topic: KXStudio Website has moved
Replies: 35
Views: 12376

Re: KXStudio Website has moved

Good move, it seems that Sourceforge is dying fast, and Github is much better and more modern in many ways.
by emarsk
Sat Jul 18, 2015 1:04 pm
Forum: Plugins, Effects and Instruments
Topic: Moony - realtime Lua as programmable glue in LV2
Replies: 3
Views: 2388

Re: Moony - realtime Lua as programmable glue in LV2

[grammar tips]
ventosus wrote:Moony let's you:
Moony lets you:
Moony ships with a simple code editor as it's UI as:
Moony ships with a simple code editor as its UI as:

More tips: http://theoatmeal.com/comics/misspelling

[/grammar tips]

:) Have a nice day! :)
by emarsk
Sat Jul 18, 2015 12:37 pm
Forum: System Tuning and Configuration
Topic: No sound from Audiobox 1818VSL
Replies: 5
Views: 4003

Re: No sound from Audiobox 1818VSL

As a start, I'd suggest to get rid of pulseaudio, so there's one less thing in the equation.
by emarsk
Fri Jul 03, 2015 4:00 pm
Forum: Computer Related Hardware
Topic: USB interface latency
Replies: 15
Views: 10396

Re: USB interface latency

You can use jack_delay (from http://kokkinizita.linuxaudio.org/linuxaudio/ ) to measure the real latency. The latency reported by jack (and its configuration tools) is only the one introduced by the buffer, it doesn't - and can't - measure all the other ones: USB driver, AD/DA conversions etc. More ...
by emarsk
Mon May 25, 2015 8:28 pm
Forum: HOW TOs, Tips & Tricks
Topic: Record What you Hear in Linux (stereo mix)
Replies: 7
Views: 7837

Re: Record What you Hear in Linux (stereo mix)

I forgot to say: it requires "/usr/lib/alsa-lib/libasound_module_pcm_jack.so" (or a similar path, it depends on your distro) to work.
In Debian and Ubuntu, it's in the "libasound2-plugins" package, in Gentoo, it's in "media-plugins/alsa-plugins" with USE=jack.
by emarsk
Sat May 23, 2015 9:38 am
Forum: Plugins, Effects and Instruments
Topic: Hail to Impulse Response!
Replies: 89
Views: 27093

Re: Hail to Impulse Response!

I understand what you mean. I don't think so. I'm sorry, it's entirely my fault, I can't came up with a decent explanation of what non-linear means. That was just an example to show that if the system is non-linear, things get out of hand. A sweep measures one freq at a time, at a fixed amplitude T...
by emarsk
Thu May 21, 2015 11:09 am
Forum: Plugins, Effects and Instruments
Topic: Hail to Impulse Response!
Replies: 89
Views: 27093

Re: Hail to Impulse Response!

Yes, the best (only?) way to emulate a non-linear system is to emulate its behaviour at the level of single components. The behaviour of an amplifier is wildly complex, EXACTLY because of its non-linearities, and because real components don't behave exactly like idealized components. There are a lot...
by emarsk
Wed May 20, 2015 10:40 pm
Forum: Plugins, Effects and Instruments
Topic: Hail to Impulse Response!
Replies: 89
Views: 27093

Re: Hail to Impulse Response!

What I think of is rather to introduce a measure of *total* amplitude of the signal. That means introducing some sort of windows in time to sample total amplitude (or some much cleverer kind of measure). That's a sort of amplitude envelope, then, and if you use windowing, then you'll have different...
by emarsk
Wed May 20, 2015 7:48 pm
Forum: Plugins, Effects and Instruments
Topic: Hail to Impulse Response!
Replies: 89
Views: 27093

Re: Hail to Impulse Response!

So instead of F(t)*G(t), it would be something like F(t)*G(a,t) where a is the amplitude of F(t). Exactly, and the "amplitude of F(t)" is F(t) itself, so the convolution would be F(t)*G(F(t),t), unless you're thinking of the envelope (let's call it "E") of the signal, and then it would be F(t)*G(E(...
by emarsk
Wed May 20, 2015 7:35 pm
Forum: Plugins, Effects and Instruments
Topic: Hail to Impulse Response!
Replies: 89
Views: 27093

Re: Hail to Impulse Response!

I was thinking more along the lines of a impulse and a convolution of a function in two variables, F(frequency, amplitude). Something that would convolute in two dimensions. No idea if it is actually possible, but mathematically then why not? In my days functions could generally be extended to n-tu...
by emarsk
Wed May 20, 2015 10:46 am
Forum: Plugins, Effects and Instruments
Topic: Hail to Impulse Response!
Replies: 89
Views: 27093

Re: Hail to Impulse Response!

Theoretically if you take a whole bunch of impulse responses at different levels you could use a dynamic convolution to reproduce the non-linear system. I've never actually heard of anyone doing that in practice. That idea also crossed my mind, and gave me another idea. What we are talking about he...
by emarsk
Mon May 18, 2015 7:56 pm
Forum: Plugins, Effects and Instruments
Topic: Hail to Impulse Response!
Replies: 89
Views: 27093

Re: Hail to Impulse Response!

Impulse responses make sense only for linear or quasi-linear systems. It doesn't work for non-linear ones (such as saturating tapes/amps/pedals/whatever). That is, whenever the amplitude of the input affects the waveform of the output, IRs are useless.