Linux-audio-user October 2011

linux-audio-user@lists.linuxaudio.org

130 participants
138 discussions

by James Stone

Hi All, Just wondered if people could give me a list of their favorite DSP plugins for "normal" studio recording type jobs. I guess I would need a parametric EQ, compressor and reverb.. Anything else? Whenever I have tried to mix a live recording before, I have always got lost in the spectacular array of different plugins - but quite often never found one that quite fits the bill. So I'm wondering if I have everything I need installed at the moment - and what the number 1 go-to effects are for people here? James

13 years, 2 months

csound conference on youtube

by joachim heintz

hi all - all discussions, workshops, papers and some other stuff from the csound conference in hannover (septemer 30 - october 2, 2011) can now be found at this youtube channel: http://www.youtube.com/user/csconf2011 the videos include: - developer-user-roundtables: -- roundtable 1: technology -- roundtable 2: community - workshops: -- steven yi: composing with blue -- michael gogins: writing csound opcodes in lua -- reza payami: csound - maxmsp translation -- richard boulanger: introducing csound4live -- rory walsh: developing csound plugins with cabbage -- max marcoll: quince - new ways of modular music editing - papers: -- andrés cabrera: python scripting in qutecsound -- reza payami: csound and object-orientation -- gleb rogozinsky: a personal view on teaching csound -- peiman khoshravi: circumspectral sound diffusion -- kim ervik/oeyvind brandtsegg: creating reverb effects using granular synthesis -- massimo avantaggiato: pwgl - a score editor for csound - richard boulanger: keynote - joachim heintz: welcome - impressions (amongst them the sound installations) other informations can be found on www.cs-conf.de enjoy - joachim

13 years, 2 months

Looking for Audio Watermarking Advice & Tools

by Moon

Kevin, Would something like this suffice or at least lead you in the direction you were headed? http://www.codeproject.com/KB/security/steganodotnet8.aspx -M Date: Sun, 23 Oct 2011 08:13:24 -0700 From: Kevin Cosgrove <kevinc(a)cosgroves.us> Subject: [LAU] Looking for Audio Watermarking Advice & Tools To: linux-audio-user(a)lists.linuxaudio.org Message-ID: <20111023151325.350C7BE006(a)joseph.cosgroves.us> Content-Type: text/plain; charset=us-ascii The subject line says it all. I'm looking for a Linux solution to watermarking audio. Thanks.... -- Kevinersion 0.01 even just being able to attach an md5 sum of an audio file along with a gpg signature would be cool. I use a subset of GNUPG's capability. Maybe you can see that in my above requirements? ;-) Is that a useful start on a start? Thanks.... -- Kevin

13 years, 2 months

Re: [LAU] Looking for Audio Watermarking Advice & Tools OFFLIST

by Nick Copeland

> My end goal is to insert content into an audio file to identify me as > the creator and identify which parts of the Creative Commons license > apply to its release. What term should I use to name that? Paranoia? Creative Commons is about letting your children leave home and find a life of their own - they are still your children but you accept that they have gone feral. If you cannot handle that then don't release in the public domain. Nick. "we have to make sure the old choice [Windows] doesn't disappear”. Jim Wong, president of IT products, Acer > To: nickycopeland(a)hotmail.com > Subject: Re: [LAU] Looking for Audio Watermarking Advice & Tools > Date: Sun, 23 Oct 2011 13:32:18 -0700 > From: kevinc(a)cosgroves.us > > > On 23 October 2011 at 22:10, Nick Copeland <nickycopeland(a)hotmail.com> wrote: > > > > Have you ever signed a file with GNUPG? That's a watermark. > > > Have you ever used an SHA or MD5 signature of a file, and > > > verified those signatures with GNUPG? > > > > What is the relationship? > > > > These are not watermarks. The above are methods to prove or > > disprove that any given person was the source of a given > > message. > > That's precisely the intent of what I want to do with an audio file > watermark, to prove that at least at one point I was the source of > the file. > > > A watermark is a means of marking a resource such that it may > > not be used by anybody else without degradation of quality. > > We have in mind different definitions of "watermark". Certainly, I > could be wrong in my terminology. > > This definition http://www.thefreedictionary.com/watermark doesn't help. > > This definition http://www.webopedia.com/TERM/D/digital_watermark.html > leans more in the direction of what you're saying in the 3rd sentence > of the first paragraph. But, the first sentence of that paragraph is > much like what I would want. I'm only after the identification of the > material, not the restriction of the material. If I wanted > restriction, then I would have asked for advise on how to do that > instead. > > My end goal is to insert content into an audio file to identify me as > the creator and identify which parts of the Creative Commons license > apply to its release. What term should I use to name that? > > Thanks.... > > -- > Kevin > >

13 years, 2 months

Controlling pulseaudio volume via XF86AudioLower/RaiseVolume buttons

by Andrew C

Hey all, I'm running Ubuntu 11.04 and have switched away from the Gnome 2 DE in favour of lwm and other assorted lightweight window managers etc. One thing I'm trying to get working again is the XF86AudioLowerVolume and XF86AudioRaiseVolume (as detected by xev) hotkeys on my keyboard to lower and raise the volume of the default pulseaudio sink by, lets say, +/-5% (incidentally, I'm having issue with the Monitor brightness increase key working, but not the down key. Probably better for me to ask somewhere else about that though). Should scripting and a suitable keygrabber (lets say, xbindkeys) work for this kind of stuff, or is there hardcoded gnome2/pulseaudio stuff going on? Thanks, Andrew.

13 years, 2 months

Re: [LAU] Top DSP plugins?

by Ralf Mardorf

> On 10/18/2011 07:45 PM, S. Massy wrote: > > - Finally, the only thing which seems to have been left out by others is > > the TAP scaling limiter which is great for final limiting if handled > > gently. > > > > Oh yeah true! Most of the time the LADSPA Fast Look Ahead Limiter is > sitting in my Master bus. > > Best, > > Jeremy I don't know the TAP limiter. But whats bad with Steve Harris Fast Look Ahead Limiter? It's one of the best limiters I know and btw. any Limiter is useless in the master bus. There's enough headroom to ban a limiter, assumed the basic mixing is ok. AFAIK there's only one usage for a limiter in the master bus. Do wish to get rid of any dynamic? Regards, Ralf

13 years, 2 months

[OT] Screen recording with jack: pain

by Lorenzo Sutton

Once upon a time I could record fine with (gtk)recordmydesktop selecting jack... then jack audio recording seems to be broken (in Ubuntu and now in Debian (wheezy)) with funky errors since quite a while. Then I had hacked a couple of script using ffmpeg with jack support... which of course involves compiling ffmpeg with jack enabled (and recording is a bit clumsy as you have to manually connect the jack client to ffmpeg jack client then cut that boring part from the video etc.) I was wondering what people's setup for (especially on debian) are, and if any simple solution currently exists. Lorenzo

13 years, 3 months

Voice-to-drums in general and the Trigger LADSPA in particular

by Artem Vakhitov

Hi all, I am in search of a more or less easy way to do voice-to-drums - that is, to trigger drum samples (MIDI or otherwise) and control their volume (velocity) using my voice recorded from a microphone. Real-time is not necessary, and neither is multi-sample capability. The objective is to create more lively, groovy drum loops, which I can emulate with my voice. I tried using the Trigger LADSPA plugin but so far have not had any success with it. The output I get makes no sense to me, and the meaning of some parameters like e.g. threshold is unclear due to units chosen. Can anyone point me to any HOWTOs on using Trigger or describe the workflow in a few words? I would also like to know about possible alternatives to Trigger, including those for Windows. Thanks in advance, Artem Vakhitov

13 years, 3 months

[music] kiti le step

by Dan S

Hi all - This was made with SuperCollider on Linux: http://chordpunch.com/releases/cp0x02/ Also, I made the video for it (for better or for worse). I was planning to use Toonloop but I couldn't get it working at the time, so I ended up using SuperCollider with ffmpeg to do generative stop-frame animation, which ended up quite a neat way to do it. Dan -- http://www.mcld.co.uk

13 years, 3 months

[ANN] spectrojack 0.4

by Cedric Roux

Hi LAU, spectrojack is a little program to display sonogram/audiogram (however that's called) in a jack setup. You need gtk 2 to compile it. It is at: http://sed.free.fr/spectrojack/spectrojack-0.4.tar.gz (no web page yet, sorry). If you are adventurous, Lorenzo Sutton says he has problems with the colormaps' browser in a 32b ubuntu host. I can't reproduce the bug. If you have it... (open the menu, "colormaps" then browse to spectrojack-0.4/colormaps and click on default.txt, the colormaps should be loaded; Lorenzo sees an error for each colormap, screenshot at http://sed.free.fr/spectrojack/lorenzo.png) (that bug is weird) (these are the Italians :)) Apart from that, the display might not be accurate. It's a simple STFT and maybe I do everything wrong in there. Take it as not-even-beta thing. Regards, Cédric. PS: CC me, I don't read the list for the moment.

13 years, 3 months

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Linux-audio-user October 2011