Linux-audio-user May 2014

linux-audio-user@lists.linuxaudio.org

75 participants
58 discussions

by Cristiano Alessandro

Hi all, I am very new to Jack and Linux audio in general, so I apologize if my questions are silly. I own a POD HD300, and I would like to use it as a sound card to loopback my guitar sound in the computer speakers...recording would also be nice. The POD gets appropriately recognized by the system and its device driver functions properly. In fact, I can hear sound using Pulse, of course with huge latency. I would like to use Jack for this (already properly installed and set it up for real time scheduling). I have configured Jack from QJackCtl such that the interface I am using is my POD (interface box in the Setup window - interface which is different than the one used in Pulse). Now, I cannot really go on. I guess I have two options to loop my sound back to the speakers (and please correct me if I am wrong): (1) specifying the input and output device in the Setup window appropriately; (2) specifying a proper connection in the Connections window. Option 1. The Input Device and Output Device scroll down list in the setup window are only usable if I select Duplex in the Audio scroll down list. And, in any case, they only list the audio cards of my PC, not the speakers. I guess, this is not the right way then. However I have some questions: what are the Input and Output device scroll down lists good for? And why can they only be used with duplex? Option 2. The POD appears only in the ALSA tab of the Connection window. Therefore I cannot connect it to loopback, which instead appears in the Audio tab. How can I proceed? And, in general, what is the difference between the three tabs Audio, Midi, and ALSA? Why don't I get the POD in the Audio tab as a USB sound card? Thanks a lot for helping Best Cristiano Scopri istella, il nuovo motore per il web italiano. Istella garantisce risultati di qualità e la possibilità di condividere, in modo semplice e veloce, documenti, immagini, audio e video. Usa istella, vai su http://www.istella.it?wtk=amc138614816829636 [1] Links: ------ [1] http://www.istella.it?wtk=amc138614816829636 Scopri istella, il nuovo motore per il web italiano. Istella garantisce risultati di qualità e la possibilità di condividere, in modo semplice e veloce, documenti, immagini, audio e video. Usa istella, vai su http://www.istella.it?wtk=amc138614816829636

10 years, 10 months

PulseAudio on top of Jack

by Max

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 I'm running PulseAudio on top of Jack and I'm satisfied with the experience http://trac.jackaudio.org/wiki/WalkThrough/User/PulseOnJack One exception is that i need to restart PulseAudio (pulseaudio -k) and the application using it (for ex. Chromium or Firefox) after every suspend. Is there a way to solve this little annoyance? m. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.14 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iEYEARECAAYFAlNKutEACgkQ3EB7kzgMM6IOxACghhcVBhU7l0hW2IeyMse8Wq03 itgAn3E20JTwz9WPO7goBqbL5IYEJx+f =7oMq -----END PGP SIGNATURE-----

10 years, 10 months

Fwd: DIY acoustic absorbers?

by Moshe Werner

Hi, > > I recently moved to a new flat, and I've just got my studio properly setup > in one of the rooms. > Congrats! I hope we get a lot of your beautiful music out of this room:) > Problem is, the room is rather horrible acoustically. As this is the room > I've got to play with, I'm going to have to make the best of it > acoustically. > > So, my question is about DIY acoustic absorbers. I'm most likely looking > to build absorbers both for mid/hi-end (I'm thinking the classical rock > wool ones you place spaced out a bit form the walls) and for the lower end, > but I am very much open for suggestions. Here's some specs of my setup: > > - The room is roughly 3.60m wide, 3.40m long and 2.50m high. I think at > least one wall is concrete. > As first step I would consider to mix facing the narrow side of the room Plus always keep everything nice and symmetric. Also I would recommend to measure the room to see what problems you're dealing with. http://www.roomeqwizard.com/ is available for Linux AFAIK. - My mixing position/monitors is in the middle of the front wall. I sit > about 1.20m out from the wall. > Have you heard about the 38% rule? If not read up on this http://realtraps.com/art_room-setup.htm, also covers early reflection points. > - My monitors are small, a set of Adam A3X (so 3" elements I guess). It > basically gives very low bass response, so I can hear fairly OK down to > about 80hz, rapidly declining down to 60hz where there's nothing left. > Less low energy buildup, but as you mentioned you won't know whats down there so I would recommend you to treat for lower frequencies in case you upgrade your speakers in the future. > - I am not terribly dependent on mixing at high volumes, if that matters. > It matters a bit as there is less energy to be absorbed, but again I would treat properly just in case you want to listen with higher SPL's, so it doesn't totally change the EQ of your mix (anyway it will change with sound pressure level because of equal loudness contour<http://en.wikipedia.org/wiki/Equal-loudness_contour>) > > What I currently have is: > - Two large bookshelves along the wall right behind my mixing position > acting as diffusors. These go almost all the way up to the ceiling, and has > stuff unevenly stacked at different heights/positions in the bookshelf. > They cover 1.60m in the middle of the back wall. > I've got good experience with bookshelves in homestudios, given they aren't to close behind the listening position. > - I also have a fairly large carpet on the floor in the middle of the > room. It probably doesn't do that much, but maybe it does a little. > It does a little in preventing flutter echo of high frequencies. > > My question then is; are there any effective ways of acoustically treating > this room? Of course, given the topic of the e-mail, I'm very much willing > to do my own DIY solutions, if that's a viable option. What I have been > thinking is doing what I mention above; classical absorber "panels", and > bass traps. > I would treat the corners and early reflection points first. In a homestudio of a friend we filled the corners with rockwool made a wooden frame and covered them with fabric. Early reflection points can be treated with 10-15cm thick "classical absorber panels". For our live room we've done something else, we made wooden slat covered frames and filled the cavity with rockwool . I like what it does to the room as it doesn't make it dead but tames the response quite nicely. > But, before I start anything, I'd very much like input from people who > actually know what they're talking about (I'm looking at you on this list > ;) ). So, does anyone have thoughts/suggestions for me? Any recommended way > of doing this? > > Thank you very much for any help and any replies! > Best of luck! Moshe

10 years, 10 months

DIY acoustic absorbers?

by Gabriel Nordeborn

Hi! I recently moved to a new flat, and I've just got my studio properly setup in one of the rooms. Problem is, the room is rather horrible acoustically. As this is the room I've got to play with, I'm going to have to make the best of it acoustically. So, my question is about DIY acoustic absorbers. I'm most likely looking to build absorbers both for mid/hi-end (I'm thinking the classical rock wool ones you place spaced out a bit form the walls) and for the lower end, but I am very much open for suggestions. Here's some specs of my setup: - The room is roughly 3.60m wide, 3.40m long and 2.50m high. I think at least one wall is concrete. - My mixing position/monitors is in the middle of the front wall. I sit about 1.20m out from the wall. - My monitors are small, a set of Adam A3X (so 3" elements I guess). It basically gives very low bass response, so I can hear fairly OK down to about 80hz, rapidly declining down to 60hz where there's nothing left. - I am not terribly dependent on mixing at high volumes, if that matters. What I currently have is: - Two large bookshelves along the wall right behind my mixing position acting as diffusors. These go almost all the way up to the ceiling, and has stuff unevenly stacked at different heights/positions in the bookshelf. They cover 1.60m in the middle of the back wall. - I also have a fairly large carpet on the floor in the middle of the room. It probably doesn't do that much, but maybe it does a little. My question then is; are there any effective ways of acoustically treating this room? Of course, given the topic of the e-mail, I'm very much willing to do my own DIY solutions, if that's a viable option. What I have been thinking is doing what I mention above; classical absorber "panels", and bass traps. But, before I start anything, I'd very much like input from people who actually know what they're talking about (I'm looking at you on this list ;) ). So, does anyone have thoughts/suggestions for me? Any recommended way of doing this? Thank you very much for any help and any replies!

10 years, 10 months

DIY acoustic absorbers?

by Johan Herland

(resend from subscribed email address) On Sun, May 25, 2014 at 1:47 PM, Gabriel Nordeborn <gabbe.nord(a)gmail.com> wrote: > So, my question is about DIY acoustic absorbers. I'm most likely looking to > build absorbers both for mid/hi-end (I'm thinking the classical rock wool > ones you place spaced out a bit form the walls) and for the lower end, but I > am very much open for suggestions. Here's some specs of my setup: I built some DIY floating panels suspended from the ceiling of my living room (to improve the acoustic environment in the TV/music/couch area). That part of the room is about 3.60m wide, 4.60m long and 2.60m high, so the dimensions are not too far off from yours. Maybe you'll find some of this useful/inspirational: I ended up building two big panels. each 3.00m x 1.20m. Each big panel is made from 5 smaller Troldtekt (http://www.troldtekt.com/) 1.2x0.6m acoustic panels. I went for the "Troldtekt Plus 75mm" variety, which consists of a 35mm thick layer of "wood wool" backed by a 40mm layer of mineral wool. The big panels are suspended ~0.25m from the (concrete) ceiling, by screw-in hooks and metal wires. Leaving some room behind the panels (as opposed to mounting them flush against the ceiling) improves absorption towards lower frequencies, and I still have ample height (~2.30m) below the panels. Also: suspending with wires means that I have the option of (re)moving the panels, leaving only 2 x 4 small holes to be spackled+painted. Some old, crappy pics from my phone here: https://www.dropbox.com/sh/xt2r8idaiqvhlld/AAD41vpxFRbDif_88uWk62Uva#/ Your usage (home studio as opposed to living room) means you'll likely need much more acoustic treatment than me.However, tackling the ceiling first, allows you to improve things a lot without giving up any "horizontal" space... ...Johan -- Johan Herland, <jherland(a)gmail.com> www.herland.net

10 years, 10 months

io GNU/Linux LiveDVD/USB ... You have an update available :)

by Manu Kebab

Hi all, I've uploaded a new iso of "io GNU/Linux", a LiveDVD/USB focused on multimedia (Debian based). Kernel 3.14.4 (64-bit only, 32-bit to come), Jack2 as default sound server, e18 as desktop environment and more nice stuff... For more infos: packages list, screenshots, video, howto etc... Please visit: -> http://manu.kebab.free.fr/iognulinux.html -> https://sourceforge.net/projects/io-gnu-linux/ Enjoy :) MK

10 years, 10 months

foo-yc20

by Fero Kiraly

Hi, I've just touched this synth and is famous! Thanks to developers. I 've foud three bugs: - MIDI CC message to control pitch does the effect but knob is not rotating (when changing other parameters via MIDI CC the sliders & knobs are changing their positions correctly) - MIDI CC 127 -> segfault - MIDI CC for 2 1/3' register does not exists ? thats all. sound is fantastic !!! cheers fero

10 years, 10 months

New music made with Linux: The "Lost Time" EP

by Gabriel Nordeborn

Hey everyone! It has been a while since I've finished and published new music. But, as LAC is rapidly approaching, and I'd really love to use whatever inspiration I get there making brand new stuff, I decided to pull my act together and finish a 5-track EP I've been working on for quite a while. The EP features, among others, community celebrity Glen MacArthur, and in contrast to my previous releases has vocals in various forms on more than half of the tracks. You'll find the EP in various formats at: http://www.zthmusic.com/lost-time/, or you can visit Soundcloud directly at: https://soundcloud.com/zthmusic/sets/lost-time-ep The music is, as usually, completely recorded, mixed and mastered with Ardour 3. I'm also going to write a more exhaustive post about the technicalities involved in making the EP in a few days. Keep an eye out for that on my blog, if you're interested :). I'm really happy with finally being finished with this project, and getting it out there. Please let me know what you think, I really hope you like and enjoy it! :-) Also, for those of you who are going to LAC, see you in a few days :-D Best wishes from Sweden, Gabriel/zth

10 years, 10 months

ANN: competitive iPhD research assistantship available at Virginia Tech/ICAT/DISIS

by Ivica Ico Bukvic

Apologies for x-posting, I would greatly appreciate it if you would please disseminate the following. I am pleased to announce immediate availability of a competitive 12-month iPhD research assistantship in Human-Centered Design program for the Fall 2014. Virginia Tech's new individualized Human-Centered Design (HCD) iPhD transdisciplinary degree is closely aligned with the newfound Institute for Creativity, Arts, and Technology (ICAT). iPhD is a degree designed primarily to support individually tailored PhD experiences, allowing students to actively participate in shaping their plan of study. The GAship in question seeks candidates with a solid research background, and a strong sense of independence and self-sufficiency. We are particularly seeking students interested in sonification, sound spatialization, and interactive technologies (e.g. mind-body technologies, laptop/mobile orchestras, hyperinstruments, installations, mobile/wearable computing, etc.). Candidates must possess a strong knowledge of Max and Pd/Pd-L2Ork programming environments. C/C++ programming (or equivalent) is also preferred, as well as skills in other domains (e.g. interactive multimedia, K-12 education, 3D animation, etc.). This is a 12-month renewable assistantship with a full tuition waiver and one of the highest paying stipends at Virginia Tech. To be eligible candidates need to apply, be accepted, and enroll in the new HCD iPhD program with primary focus in the computer music domain focusing on one or more of the aforesaid areas of interest. The successful candidate will be given an opportunity to participate in shaping the cutting edge 130+ speaker system and consequently its innovative spatialization, sonification, and immersion approaches in the new $100M Moss Arts Center and more specifically Institute for Creativity, Arts, and Technology's three-story Cube space and its smaller counterpart, the immersive Perform Studio. They will also work closely with ICAT faculty and students on a number of collaborative projects, including Tech or Treat, MAKEr camps, as well as ICAT IMPACT studio initiatives. For questions and application information please contact Dr. Ivica Ico Bukvic <ico(a)vt.edu> For more information: ICAT http://www.icat.vt.edu ICAT IMPACT Studio https://www.icat.vt.edu/impact DISIS http://disis.music.vt.edu L2Ork http://l2ork.music.vt.edu Best wishes, -- Ivica Ico Bukvic, D.M.A. Associate Professor DISIS, L2Ork, ICAT Virginia Tech School of Performing Arts - 0141 Blacksburg, VA 24061 (540) 231-6139 ico(a)vt.edu disis.music.vt.edu l2ork.music.vt.edu

10 years, 10 months

LAC 2014 Recordings

by Philipp Überbacher

Hey there. I was regularly checking the website for the recordings during the last few weeks. Are they not up yet or did I miss something? Regards, Philipp

10 years, 10 months

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Linux-audio-user May 2014