Linux-audio-user April 2009

linux-audio-user@lists.linuxaudio.org

112 participants
101 discussions

by Ismael Valladolid Torres

This is a nice and powerful synth that I've always considered buying second hand, being the full version or the Micromodular version. However the patch editor is Windows based, so I wonder if it can be used fully-featured using Linux. The first option is using the Windows based editor using Wine, something that I guess involves fully MIDI working. Anyone tried? Second chance is trying a Linux based editor. I see there's something called nmedit, and also something called nomad, which I am not even sure they refer to the same software. Does it allow fully featured editing of patches in the Nord Modular? Any info useful so thanks in advance! Cordially, Ismael -- Ismael Valladolid Torres Un blog ilustrado, progresista y ateo <ivalladt(a)gmail.com> http://lamediahostia.blogspot.com/ t. 0034912519850 m. 0034609884094 (Yoigo) GnuPG key: DE721AF4 Google Talk/Jabber/MSN Messenger: ivalladt(a)gmail.com Jaiku/Twitter/Skype/Yahoo!: ivalladt AIM/ICQ: 264472328

16 years, 1 month

jconv, linuxsampler, and ingen

by alex stone

OK, back home again, with the feet under the desk. I have a question. I've been having a terrific run with Ingen, and slowly building up an orchestral template. Can i open jconv and linuxsampler in Ingen as either plugins, or 'recognised' apps? I'm not sure of the means of inserting command line apps in Ingen, so it may already be possible. I start both Jconv and Linuxsampler (with templates) from the command line by default these days, so a means of inserting a 'command line plugin' in Ingen might prove useful. (or not as the case may be) The intention is to build a series of 'layers' for each app and associated ports, all routed to the top 'master' view. If i can start Ingen, and load the saved patch file, then i hop that everything will start, including templates, in one go. Any help with this, or good reasons why it's not feasible, would be appreciated. Alex. -- Parchment Studios (It started as a joke...)

16 years, 1 month

learning drums

by Pascal Lawrynowicz

Hi, Couple of days ago I saw a thread about learning drums rhythms. Maybe my website can help : www.percunivers.com (click on the uk flag for the english version). Not only about drums, because everything is made under 64Studio (mainly ardour and lilypond). The weak point is about mp3 for the exercices. I have no choice because this is the only format I can use for streaming (via flash, argh!) and the only way to have my mp3 played on any Ipod-like from my students. I'm open for any open solutions... Maybe this can help, hope you send me any feedback. Thanks, PL

16 years, 1 month

Control Alesis SR-16 drum machine with midi via jack

by Scott

I have an Alesis SR-16 drum machine that I want to control with muse (or seq24) via midi. the SR-16 plugs into my EchoAudio AudioFire12 (AF12) midi ports. My computer is running Fedora 10 CCRMA. I'm using jack, a2jmidi, and muse. I'm not sure where I'm confused - I may have Muse, jack, or a2jmidi misconfigured. It's easier to show than describe how the jack patch is configured. In FIGURE1 you can see the jack audio is configured and connected. Everything works perfectly there, I can record audio with Ardour all day without problems. http://i298.photobucket.com/albums/mm262/troutpocket/figure1.jpg When I look at the midi tab I see FIGURE2. Then I start 'a2jmidid -e' and see FIGURE3. Then I start Muse and see FIGURE4. The final configurations in the alsa tab are in FIGURE5. Disregard the connections as they're made in the pictures. http://i298.photobucket.com/albums/mm262/troutpocket/figure2.jpg http://i298.photobucket.com/albums/mm262/troutpocket/figure3.jpg http://i298.photobucket.com/albums/mm262/troutpocket/figure4.jpg http://i298.photobucket.com/albums/mm262/troutpocket/figure5.jpg Here's the output from 'a2jmidid -e' [fed@f10 ~]$ a2jmidid -e JACK MIDI <-> ALSA sequencer MIDI bridge, version 4 (123) built on Wed Dec 31 16:00:00 1969 Copyright 2006,2007 Dmitry S. Baikov Copyright 2007,2008 Nedko Arnaudov Bridge starting... Using JACK server 'default' Hardware ports will be expored. port created: Midi Through (capture): Midi Through Port 0 port created: Midi Through (playback): Midi Through Port 0 Bridge started Press ctrl-c to stop the bridge Once this is all said and done... I need to configure Muse with the correct settings. Sync Mode: Master? Midi Song Type: GM? O-Port: qjackctl or Midi Through Port-0? I believe the general midi drum map in muse is pretty much the same layout as in the SR-16. I'd love to use seq24 but for the life of me I can't figure out how to place notes on the piano-roll, and it only shows notes instead of the drum map. Anyway, I'm massively confused by too many choices here. Any help is very much appreciated. -Scott

16 years, 1 month

strange webcam audio bug, continued

by David Hugh-Jones

Hello (again) About 3 months ago I wrote about my webcam sound recording at the wrong speed. I've finally made a bit of progress understanding the bug and can now reliably reproduce it. What is strange is that accessing the webcam video makes the problem vanish. That is: 1) Plug in my webcam (a creative Live! Cam, usb id 041e:4068) 2) Record something using e.g. "gnome-sound-recorder". It will be recorded at the wrong speed. 3) Access the video using e.g. "gst-launch-0.10 v4l2src ! xvimagesink" 4) Record something again. Now it's at the right speed. Does anyone know why this might be? My best guess is that the video sets up the correct timer in some way. And is there anywhere I could (usefully) report this bug? Cheers David David Hugh-Jones Post-doctoral Researcher Max Planck Institute of Economics, Jena http://davidhughjones.googlepages.com

16 years, 1 month

LAC2009 countdown

by Fons Adriaensen

Hello all, *** Latest news from Parma *** Joern N. has been here the past few days to get the streaming running and things look really good. We should have high-resolution and stable streaming, better than ever before. The streaming server homepage is at http://lac.stackingdwarves.net (IP 78.47.233.27, both on port 80 an 8000/tcp) There are two LAC chatrooms at irc.freenode.net: #lac2009 for discussions about the current paper/concert #lac2009-piazza for off-topic discussions and socializing. Remote participants are advised to join the first. They will then be able to take part in the Q&A session at the end of each presentation. See you soon in Parma ! -- FA & JN

16 years, 1 month

Normalizing Audio Levels using RMS

by Viktor Mastoridis

Hi Linux Audio Geeks In my musical prehistory, while I was on Windows, I used to use a program called SoundForge that had one very useful feature: normalizing audio levels with RMS, even using the Equal Loudness Contour For a whole year I am struggling now to find something similar on Linux, without much success. Any help/hints will be much appreciated. Viktor

16 years, 1 month

Fwd: Normalizing Audio Levels using RMS

by Viktor Mastoridis

> > Back to the original question, is the intention to try to make a track > you are working on louder, in which case a compression tool like jamin > would seem like the right approach, or is it to try to get commercially > mastered tracks to play in sequence at the same apparent loudness in > which case what is needed is a model to score tracks for their perceived > loudness so the louder sounding ones can have their amplitude reduced to > match the less loud? > > Steve. > _______________________________________________ > Thanks from heart for the great response to all of you, To answer the question above, I need the RMS (incl Equal Loudness Contour, ELC) to be able to "to get commercially mastered tracks to play in sequence at the same apparent loudness". I need to be able to change that loudness. Usually that loudness measures from -16 to -12db in Pop music, average. It's the overall loudness of a track, not its peak levels. Also, on a bit lower level than CD, I need to be able to get my backing tracks at a similar (but loud) level so I can perform in venues not having to adjust the volume on every track. Now, to my personal experience, it's good to be able to measure a track, get the average RMS (with and without ELC, and then make decisions about the final normalize levels based on the ear and the knowledge of what is recorded in. The ELC (Equal Loudness Contour) takes in account one 'imperfection' of our ears: we can't hear lower and higher frequencies at lower loudness levels. That's why, in the old Hi-Fi amplifiers one finds the 'loudness' knob. That knob adds bass+high at quiet levels, but does no change the audio spectrum at louder levels. So, one measures the average loudness of a track and if there is a lot of bass in it, one knows that if the RMS is high, is due to the presence of bass. Then we look at the RMS with ELC. Then we decide whether to equalize out some low frequencies or live with them and have an overall quieter track, etc Also, we don't need to do mathematically precise equal loudness on an album - if one track is -14db (RMS) and another -15.5 and they sound pretty close, and their bass frequencies are similar, then no adjustment is usually done. Thus, here, as everywhere, technology works hand in hand with ears and experience and knowledge of what frequencies are recorded in that track. Finally, the answer to the question is something that would measure the average RMS (with ad without ELC) and then the RMS could be adjusted - for a whole track, per channel or only for parts of a track. Now, about the apps mentioned in this thread: 1. Jamin is a very good tool and I am using it, but it does not give measurement of the actual RMS. It does not give average values of a whole track as well. It's meant fore something different, for mastering, not for normalizing, I believe. 2. Audacity only does peak normalizing, as well as Ardour 3. Adaptive Normalize in Rezound is good, but no measurements there as well. 3. Normalize(-audio) is something I didn't know before. That tool does the job, one can measure the levels (quite fast, as there is no GIU!) and decide what level to apply per track (or even batch, for less important projects). I can't change the loudness of a part of a track, though. Also, there is no measurement taking in account the Equal Loudness contour 4. ReplayGain does not work with wav files, I believe. Also, it does not change the gain, only gives instructions to Amarok (am I right here?) by writing some code to the ID3 tag of an mp3 file. Thanks to all for your replies - if you come to some other ideas, please do write. Viktor

16 years, 1 month

Re: [LAU] Linux-audio-user Digest, Vol 26, Issue 14

by Florian Hollerweger

Hi list, > From: Paul Davis <paul(a)linuxaudiosystems.com> >> - jamin, a full-featured program with GUI: >> ?http://jamin.sourceforge.net/ >> - normalize, a simple batch with CLI [nomralize-audio, in debian] >> ?http://normalize.nongnu.org/ > > AFAIK, neither of these programs normalize using RMS Really? I was under the impression that 'normalize' normalizes to RMS unless one uses the --peak flag to normalize to peak? (Speaking of normalize's --peak flag, it would be great if it was possible to normalize to a peak other than 0dB...) best, flo.H

16 years, 1 month

Re: [LAU] [LAD] Travel from Milan Malpensa to Parma on wednesday evening

by Pieter Palmers

Benno Senoner wrote: > I agree with Fons, perhaps better to look for a cheap hotel near the > milan central railway station and take > the train next day. > for example a quick search gave me this link for low cost hotels near > the railway station, > prices starting from 41EUR > http://www.traveleurope.it/milan/milan_central_station.shtml > > so my advide would be to take the bus malpensa express from Malpensa > airport (costs a few euros) to the central railway station > and then go to the hotel by foot (there should be several hotels in a > few hundred metres range). I've also investigated this, but given the fact that I already have to cover 40eur for a stay in parma for that night, and that the public transportation would set me back about 20eur (as far as I can see from the internet), it all adds up to about 100eur anyway. So for the extra 20eur the car costs, and another 20 for gas and road toll, I'd rather get to Parma the same evening. As a hard-headed stubborn idiot I'm probably going to take the chance, against your much appreciated advice ;). It's a good opportunity to put those navigation skills to a test... and I'll have a GPS at my disposal, so that should help. In any case, thanks for the advice! Pieter > > hope this helps, > cheers, > Benno > > > > > 2009/4/13 Pieter Palmers <pieterp(a)joow.be>: >> Fons Adriaensen wrote: >>> On Sun, Apr 12, 2009 at 07:17:08PM +0200, Pieter Palmers wrote: >>> >>> >>>> I seem to have put myself in a brilliant position... My flight lands at >>>> 22:30 in Milan Malpensa airport, meaning that I can't make the last >>>> train from Milan to Parma. >>>> >>>> I have two possibilities: either stay a night in Milan and take the >>>> morning train, or rent a car in Malpensa, drive it to Parma and drop of >>>> it there the next morning. I've done the accounting for both scenario's, >>>> and the first one would come down to 100eur, while the car rental would >>>> set me back about 120 eur. Therefore I'm probably going to rent the car >>>> as it saves me a lot of hassle. >>>> >>>> But before booking it, I'm wondering if there are other people that >>>> might have the same issue. If so, a split fee would make things even >>>> more interesting (at least for me ;). >>> I wouldn't really advise anyone to travel Malpensa-Parma by >>> car, certainly not during the night unless you have already >>> done it and know what to expect. Or you have a GPS navigator >>> in the car - using just visual roadsigns could make you end >>> up in a completely different place. >> OK, good advice. A GPS isn't that much of an issue these days, so I'll >> bring one if I decide to go this route. >> >> Thanks, >> >> Pieter >> _______________________________________________ >> Linux-audio-dev mailing list >> Linux-audio-dev(a)lists.linuxaudio.org >> http://lists.linuxaudio.org/mailman/listinfo/linux-audio-dev >> > _______________________________________________ > Linux-audio-dev mailing list > Linux-audio-dev(a)lists.linuxaudio.org > http://lists.linuxaudio.org/mailman/listinfo/linux-audio-dev >

16 years, 1 month

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Linux-audio-user April 2009