Linux-audio-user January 2009

linux-audio-user@lists.linuxaudio.org

165 participants
173 discussions

What would you recommend for fine-tune equalization/calibration?

by mazarick＠bellsouth.net

I am in process of building a linux DAW system. I'm planning on using a bunch of very cheap speakers for playback of the middle range (each with its own channel), along with a stereo pair for fairly decent low range speaker for the low freq <150 hz (15" with a 5 lb magnet) and fairly decent high end tweeters for >4khz. The low freq and high freq channels will come off of an electronic crossover and can be adjusted independently from the middle range speakers. I'd like to get some method of injecting pink noise and auto-calibrating the midrange speakers to pre-compensate for the 'smile' (or frown) shaped frequency response curve of the cheap-o speakers. The speaker/amp setup will remain in the same place for the duration, so the calibration will only need to be done once (or until the room, the speakers, the amplifiers, etc change) What would you recommend for: 1. Applying a pink noise to everything 2. Auto-calibrating (pre-warping) with fairly narrow freq band filters (at least 3 filters ~+-10 db per octave) This doesn't have to be done real time. It is anticipated that I'll want to run 'wav' or similar files thru the filter prior to doing some additional 'black magic' with delays on various sound sources. Even though the stereo crossover and existing equalizer has some capability for doing this, but it may be easier to do everything with the same method and handle all of them at once with the same method. I'm looking at various DSSI, LADSPA, PD, etc effects to do this, but I'd like to work with what someone else has already had some success with. There is an extra bonus if I can use the same software suite to add in a variable amount of delay per source, since this will be the next step. There is a high likelihood I'll go with a method that is recommended by someone and has shown good/positive experience. I'm currently thinking I will need to script the part where a variable delay is added, and simply add in a number of '0' samples to the front end and back end of a source (to keep everthing the same length). Depending on how far the sound source is from each speaker, I'll put more 0's on the front of the sample list for sounds that are far from the speaker and less 0's on the front of the sample list for sounds that are close to the speaker, with the difference going to the back end of the list. What I will end up with is a bunch of files that are almost the same thing, except they will have a variety of delays in the start time. I'll then add up all the sources with Ardour and have a separate mix per speaker. TIA, Mike Mazarick

15 years, 3 months

Re: [LAU] New plugin site

by Jaromír Mikeš

< Hi Mira, did you run ./configure before make? (or, in my case with 64 < Studio 2.1, i had to run ./configure --prefix=/usr) < Yes I did .. 2.1 64Studio 32bit ... ./configure --prefix=/usr mira

15 years, 3 months

recommendations for midi controller keyboard

by andy baxter

Hi, I'm thinking of getting a midi controller keyboard. I.e. no onboard synth just a keyboard which sends midi messages to the computer. Should be pressure sensitive but not worried about aftertouch. Ideally it should work with a usb cable under Linux (but have a midi out as well in case I ever need it). Assignable controller knobs would be nice but not necessary. I had a quick look on the gak.co.uk website, and this one looks like the sort of thing I want (though I don't know if it works with Linux): http://www.guitarampkeyboard.com/en/behringer-umx-61/70535 Any (other) recommendations? andy

15 years, 3 months

Re: [LAU] New plugin site

by Jaromír Mikeš

< > Some missing dependencies? < < Yes, install your distros build environment. debian/ubuntu calls it < build-essential. I have this package installed ... :-( mira

15 years, 3 months

The Drummer's Gigsaw: Hip-Hop + Rap +...

by Philippe Hezaine

Hi all, You'll find the Hip-Hop + Rap + contributions from Chris McCormick at: http://philippe.hezaine.free.fr/spip.php?article31 WARNING: I changed the equivalences of dynamics by default in Lilypond. In the README.txt there is a copy of the new table. And i included the new midi.scm. It's for those who want to recompile some patterns. Have fun. -- Phil. Superbonus-Project (Site principal) <http://superbonus.project.free.fr> Superbonus-Project (Plate-forme d'échange): <http://philippe.hezaine.free.fr>

15 years, 3 months

webcam into freej

by nescivi

Hiho, I'm playing around a little with camera based input and am running into a similar problem as Dave Phillips posted on the 64studio-users list about about half a year ago... But, my built-in camera does work with luvcview/guvcview, so I was wondering how to make it output to a node file, from which freej could capture the stream again. Any hints and tips on how to do this? sincerely, Marije

15 years, 3 months

1 and 2 and 3 and 4

by Thorsten Wilms

Hi! I would like to remind you of my call for contributions. Take your chance of becoming part of a crowd of people all around the world, counting to the rhythm in several languages! Contributors will be credited in order of their submissions and this will also likely influence the order of use in the track ;) Besides recording yourself and family and friends and pets (if they are able to count), you can help by spreading the word. What I'm after are recordings of one person at a time, saying: A: "One Two Three Four" B: "One and Two and Three and Four and" C: "Beat" (to be translated to whatever makes sense 4 times in one measure at 4/4. A single utterance is enough, as I want to use these as accent.) - Translated in a native language and any language spoken without much of an accent. If there are special ways of counting to the beat in a language, use those (only or even better additionally) and inform me. - With a tempo of 110 beats per minute (to be very clear, the "and" has to be between beats ;). - A and B should ideally be recorded with about 4 iterations (4 measures) Don't think that your language will already be well-represented without you. Others might think the same ;) Also, the more I can layer in one language, the better. All files should be: - ideally wavpacked, or plain WAV as second choice - 32 bit float, 48 KHz - Trimmed - Normalized - Dry - Explicitly licensed as http://creativecommons.org/licenses/by-sa/2.0/ or released to the Public Domain _Only_ if you don't record with a JACK application, 16 and 24 bit integer formats are also acceptable. Please name the files as follows: - firstname_lastname_language_count.wav for "One Two Three Four" - firstname_lastname_language_count_and.wav for "One and Two ..." - firstname_lastname_language_beat.wav for "Beat" Email attachments are no option for such large files, so only send links to uploads. Consider using http://www.getdropbox.com/ if you have no other space. Please mail me off-list for submissions and on-list for questions. I'm also available as thorwil in #lad and #ardour at irc.freenode.net. My intention is to offer the result and the material on archive.org. This is an open-source project ;) I also want to submit a version to the https://wiki.ubuntu.com/UbuntuFreeCultureShowcase I can't promise to use all contributions. I will sort out ones that sound suspiciously different from others claimed to be in the same language ;) However, all serious contributors will be given credit. Extended deadline: I will start to work with the material as soon as I have enough, but will accept more until the 23rd of January. Thanks! -- Thorsten Wilms thorwil's design for free software: http://thorwil.wordpress.com/

15 years, 3 months

Decent but not necessarily pro quality USB audio for laptop?

by david

I'm looking for a decent but not necessarily pro-quality USB audio device for my laptop. The laptop currently has the usual built-in Intel HDA audio, with only a headphone jack out. I'd prefer something with line-level output. I mostly just listen to music via the laptop, but also use it for mixing live recordings of my church band. (Although I might want to be able to occasionally record from the mixer's line outs.) Any opinions on the following devices? SYBA SD-CM-UAUD USB Stereo Audio Adapter http://www.newegg.com/Product/Product.aspx?Item=N82E16812186035 SoundTech STUSBST LightSnake Stereo USB Audio Interface http://www.zzounds.com/item--STCSTUSBST Behringer USB Audio Input/output Adapter (UCA-202) http://www.universalpart.com/Behringer-USB-Audio-Input-output-Adapter_item_… M-Audio Transit http://www.zzounds.com/item--MDOTRANSIT I think they all work with Linux, but can't really tell about the Syba or SoundTech devices. Thanks! -- David gnome(a)hawaii.rr.com authenticity, honesty, community

15 years, 3 months

Test

by Thorsten Wilms

Please ignore.

15 years, 3 months

Made with Linux

by Stéphane Magnenat

Hello everybody, Here are two music pieces that I have composed using Linux: - Variations d'Automne http://www.jamendo.com/en/album/26105 - To Hope http://www.jamendo.com/en/album/30718 The lossless FLACs are available on my homepage: http://stephane.magnenat.net/music.html I've used the following programs: - Jack - Rosegarden - Ardour - LADSPA + various plugins - Lilypond In addition, for To Hope, I have recorded each singer separately, and then adjusted the pitches using a custom-made Qt4 GUI over Praat (http://www.fon.hum.uva.nl/praat/). Thanks to this trick, singing is in-tune in To Hope, event though the piece was difficult to sing and the singers were amateurs. To ensure temporal synchronisation, singers were listening to their voices in a headphone while singing. However, I still had to adjust synchronisation a lot using Ardour. If anyone is interested in the Qt4 GUI over Praat, I'll be happy to release it as open source, but be warned that it is currently very custom-tailored to my need, not particularly clean, and not commented. Kind Regards. Have a nice day, Stéphane -- http://stephane.magnenat.net

15 years, 3 months

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Linux-audio-user January 2009