Linux-audio-user July 2011

linux-audio-user@lists.linuxaudio.org

103 participants
107 discussions

Re: [LAU] Applying effects when recording electric guitars: before or after recording?

by Ralf Mardorf

On Thu, 2011-07-07 at 10:02 +0000, linux-audio-user-request(a)lists.linuxaudio.org wrote: > Message: 27 > Date: Thu, 7 Jul 2011 09:12:29 +0000 > From: Fons Adriaensen > Subject: Re: [LAU] Applying effects when recording electric guitars: > before or after recording? > > The 'lot of work' is maybe what it takes, and you can always record > two or more tracks at the same time, a clean one and any number with > effects applied. This is the answer to what the so called pros do, if possible, when they piece together pop music. > > Message: 28 > Date: Thu, 7 Jul 2011 11:17:52 +0200 (CEST) > From: Cedric Roux > Subject: Re: [LAU] Applying effects when recording electric guitars: > before or after recording? > > ----- "Arve Barsnes" <arve.barsnes(a)gmail.com> wrote: > > > On 7 July 2011 10:06, Alexandre Prokoudine > > <alexandre.prokoudine(a)gmail.com> wrote: > > > 2011/7/7 Roberto Su?rez Soto: > > > > > >> ? ? So, what do the real pros (that'd be you ;-)) do? > > > > > > They use hardware rigs. I'm quite serious. > > > > > Indeed. Ideally, the computer should not be responsible for any > guitar > > effects. > > and what do you think all those effect boxes do? how do they work? > by magic? or by electronics? > > The only difference is that you can push hard on the box with your > foot while you play live. Nonsense, if you wish to produce particular sound you need particular effects. Not all choruses, wha-whas etc. are equal. > > Apart from that > I think you can emulate everything else, at least theoretically. Nonsense. Discrete circuits have responding qualities that can't be emulated. You're writing that for "room/ampli/microphone placement" there are issues, but not regarding to effects? I guess you're referring to the room, to the responding qualities of a microphone etc.. This can't be emulated today, correct. But why do you think that software is able to emulate discrete circuits? It's the same issue, e.g. the responding quality of the circuit. Even the sound some microchips do generate can't be emulated, e.g. by CEM microchips. > > Pros don't go that route because they learned with some tools and > stick to them. All Germans eat Sauerkraut, all Italians eat Spaghetti, all amateur guitarists are interested in new stuff, but pros stick to old tools. It's the other way around, pros test new stuff a long time before amateurs just hear about it. > > Message: 29 > Date: Thu, 7 Jul 2011 09:58:55 +0000 > From: Dale Powell > Subject: Re: [LAU] Applying effects when recording electric guitars: > before or after recording? > > > > > > > The only difference is that you can push hard on the box with your > > foot while you play live. > > > > Disagree! Effects pedals and the like have almost no round-trip > latency (through soundcard, to the processor, and back for monitoring) > and usually a much lower processing time (especially if they are > analogue!) both of which are very important points when you are > listening to the effected path while playing. Latency? Hm? You might be right, but usually latency is that low, that it doesn't matter and some old digital devices, e.g. the Yamaha SPX 90 II, with an unique sound might have longer latency. A lot of effects are a mix of the clean sound and an anyway delayed signal. Regarding to latency I tend to disagree. > Message: 30 > Date: Thu, 07 Jul 2011 12:02:27 +0200 > From: Jeremy Jongepier <autostatic(a)gmail.com> > Subject: Re: [LAU] Applying effects when recording electric guitars: > before or after recording? > To: linux-audio-user(a)lists.linuxaudio.org > Message-ID: <4E158433.8040303(a)autostatic.com> > Content-Type: text/plain; charset=UTF-8; format=flowed > > On 07/07/2011 11:08 AM, Renato wrote: > > On Thu, 7 Jul 2011 10:36:49 +0200 > > Arve Barsnes<arve.barsnes(a)gmail.com> wrote: > > > >> On 7 July 2011 10:06, Alexandre Prokoudine > >> <alexandre.prokoudine(a)gmail.com> wrote: > >>> 2011/7/7 Roberto Su?rez Soto: > >>> > >>>> So, what do the real pros (that'd be you ;-)) do? > >>> > >>> They use hardware rigs. I'm quite serious. > >>> > >> Indeed. Ideally, the computer should not be responsible for any > >> guitar effects. > > > > why? > > > > renato > > I'd like to know too. I know albums where the guitars are all running > through NI Guitar Rig for example. > I'm perfectly ok with Guitarix, Rakarrack, linuxDSP, Calf and the > likes, > I can get pretty decent sounds out of it. What I normally do is to > record the clean guitar track while it does run through the desired > effects before it goes to my headphones/monitors. Like this you > record > the guitar track with the right feel but you still have the > possibility > to play around with it afterwards. For serious studio work I'd prefer > valve amps with decent speaker cabinets or valve combo's but for > homerecording using the computer to process your guitar is a good > option > I think. > > Best, > > Jeremy Jeremy +1, but the question was, what the pros do and pros don't do homerecording, when they do professional work. Btw. for some kind of music there isn't the need to use a valve amps or any amp, it's possible to play the guitar directly to the mixing console, OTOH it's more fun to play by an amp, even if the sound isn't needed for the recording, it's better for the feeling. We shouldn't confuse response with latency. 2 Cents, Ralf

13 years, 2 months

jack session question

by fred

Hi list, with QJackCtl 0.3.8 the session window is supposed to "re-start" all applis and settings saved. If I reload a recent session with applis started it's ok, but if only Jack is running nothing loads. Did I miss something in the QJack settings ?

13 years, 2 months

How to bypass preamps in a Behringer ADA8000 unit

by Giorgio - Audiophilo

Hello guys, i've recently bought a Behringer ADA8000 unit. If i recall well, there's a way to bypass its preamps but i can't find specific documentation about. Can anybody help me? Thank you in advance. -- Giorgio Baù *Sound engineer* T.Rex Studio www.trexstudio.com

13 years, 2 months

Experimental? Ambient?

by Folderol

This is a totally new direction for me, inspired by memories of when I was a child and held my ear to telegraph poles and was awed by the sounds of the wires. http://www.musically.me.uk/music/Wires.ogg -- Will J Godfrey http://www.musically.me.uk Say you have a poem and I have a tune. Exchange them and we can both have a poem, a tune, and a song.

13 years, 2 months

cgroups in kernel, no libcgroup... RT?

by Renato

Hello, CONFIG_RT_GROUP_SCHED is enabled in the default archlinux kernel. Reading this page http://trac.jackaudio.org/wiki/Cgroups I'm not sure I understand the second paragraph, "Why does it touch jackd". If I do *not* have libcgroups installed (which is the default on arch, the package is found only in the AUR user's repository, not in official repos), am I still ok for doing RT? cheers renato

13 years, 2 months

[promo] Livecoding concerts: Paris (Sat 9th July) and Strasbourg (Mon 11th July)

by nescivi

Hi all - Two livecoding concerts this weekend in France: Saturday in Paris and then Monday in Strasbourg. The majority of the code will be sc :) PERFORMANCES FEATURING: - Marije Baalman (NL) - Charlie Chocolate (NL) ((Strasbourg only)) - Michele Pasin (IT/UK) - MCLD (UK) PARIS, Sat 9th July: La Generale 14, Avenue Parmentier Metro station: Voltaire http://lagenerale.fr/ http://www.facebook.com/event.php?eid=238044802881179 http://www.last.fm/event/1989879+Livecoding+concert STRASBOURG, Mon 11th July: Place Rouge (parvis de la fac de droit) (law school square) (nearest tube?) 8pm--10:30pm Part of the RMLL free software festival <http://2011.rmll.info> http://www.facebook.com/event.php?eid=247195045307080 http://www.last.fm/event/1989716+Livecoding+concert Flier: http://flic.kr/p/9ZWb5o Please do forward, esp to your french copains sincerely, Marije

13 years, 2 months

Re: [LAU] Kernel 2.6.39

by Ralf Mardorf

On Thu, 2011-06-23 at 12:00 +0000, linux-audio-user-request(a)lists.linuxaudio.org wrote: > > Message: 1 > Date: Thu, 23 Jun 2011 08:42:15 +0100 > From: Rui Nuno Capela <rncbc(a)rncbc.org> > Subject: Re: [LAU] Kernel 2.6.39 > To: linux-audio-user(a)lists.linuxaudio.org > Message-ID: <4E02EE57.7020003(a)rncbc.org> > Content-Type: text/plain; charset=ISO-8859-1; format=flowed > > On 06/23/2011 07:17 AM, Ralf Mardorf wrote: > > > > I used the config from the self-build kernel 2.6.33.9-rt31 and run > > oldconfig only to configure 2.6.39. I didn't make music until now using > > this kernel. Yes, I wish to "emulate" the PREEMPT_RT, since common > > PREEMPT only kernels never did, what I needed. > > > > What do I need to set? > > > > $ cat config-2.6.39.1 | grep PREEMPT > > CONFIG_TREE_PREEMPT_RCU=y > > CONFIG_PREEMPT_RCU=y > > CONFIG_PREEMPT_NOTIFIERS=y > > # CONFIG_PREEMPT_NONE is not set > > # CONFIG_PREEMPT_VOLUNTARY is not set > > CONFIG_PREEMPT=y > > > > IIUC this is correct?! > > > > yes. > > and don't forget to add "threadirqs" to your kernel bootloader > line--only then you'll get "rtirq" to do its magic as it used to do on a > genuine -rt kernel. > > > > > > PS: SCHED_FF? > > > > SCHED_FF is a process/thread attribute, not a kernel configuration > option--jack does that for you when told to run with realtime scheduling. > > > byee > -- > rncbc aka Rui Nuno Capela > rncbc(a)rncbc.org > > > ------------------------------ > > Message: 2 > Date: Thu, 23 Jun 2011 00:59:29 -0700 (PDT) > From: James Warden <warjamy(a)yahoo.com> > Subject: Re: [LAU] Kernel 2.6.39 > To: linux-audio-user(a)lists.linuxaudio.org > Message-ID: > <1308815969.6124.YahooMailClassic(a)web39321.mail.mud.yahoo.com> > Content-Type: text/plain; charset=us-ascii > > > > --- On Thu, 6/23/11, Rui Nuno Capela <rncbc(a)rncbc.org> wrote: > > > From: Rui Nuno Capela <rncbc(a)rncbc.org> > > Subject: Re: [LAU] Kernel 2.6.39 > > To: linux-audio-user(a)lists.linuxaudio.org > > Date: Thursday, June 23, 2011, 3:42 AM > > On 06/23/2011 07:17 AM, Ralf Mardorf > > wrote: > > > > > > I used the config from the self-build kernel > > 2.6.33.9-rt31 and run > > > oldconfig only to configure 2.6.39. I didn't make > > music until now using > > > this kernel. Yes, I wish to "emulate" the PREEMPT_RT, > > since common > > > PREEMPT only kernels never did, what I needed. > > > > > > What do I need to set? > > > > > > $ cat config-2.6.39.1 | grep PREEMPT > > > CONFIG_TREE_PREEMPT_RCU=y > > > CONFIG_PREEMPT_RCU=y > > > CONFIG_PREEMPT_NOTIFIERS=y > > > # CONFIG_PREEMPT_NONE is not set > > > # CONFIG_PREEMPT_VOLUNTARY is not set > > > CONFIG_PREEMPT=y > > > > > > IIUC this is correct?! > > > > > > > yes. > > > > and don't forget to add "threadirqs" to your kernel > > bootloader > > line--only then you'll get "rtirq" to do its magic as it > > used to do on a > > genuine -rt kernel. > > > > And remember to use /etc/default/grub to have this threadirqs boot option permanent: > > /etc/default/grub : GRUB_CMDLINE_LINUX="threadirqs" > > if you are too lazy to compile / recompile /etc, just use the liquorix debian kernel (http://liquorix.net/) > > I use that one (kernel compiled with CONFIG_PREEMPT=y, threadirqs at boot). It does wonders! I tried the cyclictest mentioned by Rui and I got some quite outstanding numbers on my system. > > > (However, the liquorix kernel is not PAE, which prevents the use of more than 4GB RAM for 32bit systems with more than 4GB of physical RAM) > > J. spinymouse@debian:/boot$ less config-2.6.39.1 | grep ONFIG_IRQ_FORCED_THREADING CONFIG_IRQ_FORCED_THREADING=y So I don't need to re-build the kernel? PAE is irrelevant for me, hence I'm using 64-bit architecture. Hm, less seems to be less comfortable, I hope I'm allowed to use cat instead. $ less /etc/default/grub ... needs to copies, so I fall back to cut, it needs just one copy. $ cat /etc/default/grub # If you change this file, run 'update-grub' afterwards to update # /boot/grub/grub.cfg. # For full documentation of the options in this file, see: # info -f grub -n 'Simple configuration' GRUB_DEFAULT=0 GRUB_TIMEOUT=5 GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian` GRUB_CMDLINE_LINUX_DEFAULT="quiet" GRUB_CMDLINE_LINUX="" So I need to add GRUB_CMDLINE_LINUX="threadirqs" ? Thanks, Ralf OT: > Oberhausen at 11:30 Julien, this is the Ruhrgebiet city I'm living :D.

13 years, 2 months

Some jazz for a change :-)

by Julien Claassen

Hello again! Here is a very different version of the 3-part invention in G-minor. Probably will every jazzophile criticise, that there's no evident composition principle in there, no reason behind the used chords, no scale... Still it sounds jazzy enough for me and is better, than my feable attempts at chord substitution. :-) http://juliencoder.de/nama/a_nama_night.ogg http://juliencoder.de/nama/a_nama_night.mp3 Or via the website: http://juliencoder.de/nama/music.html this piece is dedicated to Joel: Thanks for all the lovely work you did on Nama and happy belated personal new year. :-) Warm regards Julien -------- Music was my first love and it will be my last (John Miles) ======== FIND MY WEB-PROJECT AT: ======== http://ltsb.sourceforge.net the Linux TextBased Studio guide ======= AND MY PERSONAL PAGES AT: ======= http://www.juliencoder.de

13 years, 2 months

Best file system for audio?

by S. Massy

Hello, all, I know this topic comes up now and again. I'm about to create a partition for audio work and am wondering whether any new consensus has been reached over which is the best file system format for the job. What are you, fellows using? Cheers, S.M. -- --

13 years, 2 months

New Bach: 3-part invention in G-minor

by Julien Claassen

Hello Everyone! Yes even more Bach, but it's beautiful. I wanted to play this for quite some time and just noticed a few weeks ago, that my teacher actually had the notes. :-) http://juliencoder.de/nama/bach-gms.ogg http://juliencoder.de/nama/bach-gms.mp3 Or go to the website: http://juliencoder.de/nama/music.html This piece was - as ever - recorded in god, old, faithful Nama with the Sampletekk Black Grand Medium and a Concertgebouw IR reverb applied with jconvolver. Thanks to all involved devs! NOTE: The website has changed slightly. It was really very silly of me. I should have titled the links differently. It's enver too late. :-) As always, rants, comments, praise(?) welcome. Kindest regards Julien -------- Music was my first love and it will be my last (John Miles) ======== FIND MY WEB-PROJECT AT: ======== http://ltsb.sourceforge.net the Linux TextBased Studio guide ======= AND MY PERSONAL PAGES AT: ======= http://www.juliencoder.de

13 years, 2 months

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Linux-audio-user July 2011