Linux-audio-user

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20664 discussions

by Nacho -

Hi everybody. My first mail here. I have a question about send mtc between two different cities over network. Something like the osx rtp-midi for linux. I've heard that you can do it with jack, but I´m not sure if it´s only for a lan network. Just want to know if possible before starting. Thanks!

12 years, 4 months

Raspberry: problems with shell script launcher when booting

by Carlos sanchiavedraz

Hello, dear folks. I'm still (constantly) tweaking my raspberry here and there when I can. I have some configurations/sessions that run ok, Looper (jack+sooperlooper), Looper+Fx (jack+sooperlooper+rakarrack/guitarrix). But I'm still having some annoying problems that wanted to share with you: 1) Simple session script, Looper, runs quite well when launched (via ssh -X or from console) logged as PI user. When I run it as a boot/init script (simple launcher script placed in /etc/init.d and then installed with "update-rc.d launcherscript defaults 99"), almost in every first start there's crackles and noise and my loops sound distorted, even with clean guitar; if I restart then it goes well (2nd or 3d time). 2) Next step forward I added Rakarrack in charge of guitar FX routed to the Looper. First, it happens almost same thing as mentioned about noise. Well, I guess It should have something to do with the signal path and things connected to the same power supplier, so I'll have to reserve some time to debug and switch off things until I get a cleaner signal and get rid of the hum and crackles. But the main issue is that there's problems with Rakarrack not been able to start because several problems with not enough Jack ports and Jack and RT. I didn't have any of these problems before. I got to solve the problem with ports changing -p16 to -p32 when launching jack+sooperlooper (-p24 is enough for just Rakarrack). Then I made a launcher script LSB compliant (service script placed in /etc/init.d and then installed with "update-rc.d servicescript defaults", with LSB flags and functions for "start" and "stop", as a proper newer Debian service, and configured to launch last in boot phase) which then call the Jack-config+Rakarrack+Sooperlooper session launcher script. I can see on screen in the init messages this error: "JACK is running in realtime mode, but you are not allowed to use realtime schedule..." But I know RT is already configured, so I guessed it was something to do with the boot/init stage configuration and environment. I tried using "su" with several different parameters to run the launcher script as "pi" user, as It runs quite well when logged as this user (calling just the script and even with "sudo /etc/init.d/script start"). So, maybe you can't get RT in init phase on RaspberryPI and you can only when you get to the login prompt and everything is loaded and ready. But I think there's a "Puredata on Raspberry PI" project that runs some scripts in the init stage; and it seems that in order to get a headless FX+looper station, running some configuration+apps-launcher at boot time is an obvious choice. I'm sure something escapes me after so much try-error-code cicles. Maybe you have some ideas. Thanks as always. -- Carlos sanchiavedraz * Musix GNU+Linux http://www.musix.es

12 years, 4 months

Re: [LAU] mtc over network

by Len Ovens

On Tue, July 16, 2013 4:54 am, Julien Claassen wrote: > Hello Paul1 > Did you change it again or was theLAN thing only in either of the > twoJACK > versions? I definitely did want to try and we had to set up a VPN tunnel > to > use the JACK net driver. Maybe I'm just antiquated in my knowledge. At least one end has to have a "visible" IP. Physical distance of the two ends affects the latency, as do the switches/routers in the path. The lowest bandwidth link in the path determines the maximum bandwidth of information a netjack link deal with. Obviously MTC is low bandwidth, but MTC without some other information (either a midi or audio stream) is of limited value :) -- Len Ovens www.OvenWerks.net

12 years, 4 months

My second album is done!

by Gabbe Nord

Hello everyone! I'm very pleased to announce that my second album is finished and online! :D It's called "Ordinary Day Montage", and it consists of 8 tracks, and is a bit more electronic than last one. I prepared a page for this at my new website, http://zthmusic.se/Ordinary_Day_Montage , but my host is a little shaky, so it might not always work. So, if that link doesn't work, you can find the album at: Bandcamp http://zthmusic.bandcamp.com/album/ordinary-day-montage Soundcloud https://soundcloud.com/zthmusic/sets/ordinary-day-montage FLAC/OGG/MP3-formats for download at Piratebay: http://thepiratebay.sx/user/zthmusic/ I'm very excited to be finished and to have completed this. Everything was, as always, 100% made with Linux and Linux software. It's also licensed CC-BY-SA. I wrote a bit about the album and what I've used technically too at http://zthmusic.se/Ordinary_Day_Montage , if anyone wants to check that out! Anyway, thank you for taking your time to listen! I greatly appreciate it!

12 years, 4 months

[a bit OT] Vocal microphone

by Grekim Jennings

>Hello! > I need to get a vocal microphone. I've had this project several times >before, but now I'm decided. There are a couple of alternatives. there is the >Shure SM5x and there is the SE-220, if my memory doesn't betray me. Any more >suggestions on the topic? I want to pay around 100-200 EUR maximum. This >microphone will be meant solely for singing. No instruments to mic. > Warm regards and sorry for the OT again > Julien Hi Julien, I think it's the Audix OM-6 that I have here. It is nicely built and has a lot of clarity, maybe too much presence in some cases. Also, check out the Heil PR-20 which I think is a little more neutral sounding and less expensive. And the AKG C700 is a very good value. As with most mics, with a good voice it can sound great. Grekim

12 years, 4 months

Fixing a MIDI issues

by Julien Claassen

Hello everyone! this is perghaps not straight on topic, but I couldn't find a satisfactory answer anywhere else. I'm having trouble with my JV-1080. Only every second note gets played. I checked different input devices and different cables, direct and indirect connections. It seems to be a problem of the Roland itself. Internal sounds, demos and the preview button, work fine. Any idea, what this might be? It looks so systematic, as if it might be by design, but I don't know any feature, which should allow for that. Sorry to spam the list and thanks for following me so far. Warm regards Julien ---------------------------------------- http://juliencoder.de/nama/music.html

12 years, 4 months

zynaddsubfx as dssi

by Atte André Jensen

Hi I'm trying to get zynaddsubfx going as dssi plugin in renoise on crunchbang (Debian Wheezy). I downloaded the source ZynAddSubFX-2.4.3.tar.bz2, installed the dependencies, ran cmake and ccmake (switching DSSI on) as advised in doc/build.txt. Everything seems to build just fine, running make install places the dssi plugin in /usr/local/lib/dssi: atte@blokhus:~/software/zynaddsubfx/ZynAddSubFX-2.4.3$ ll /usr/local/lib/dssi/libzynaddsubfx_dssi.so -rw-r--r-- 1 root staff 3.6M Jul 12 00:35 /usr/local/lib/dssi/libzynaddsubfx_dssi.so However zynaddsubfx doesn't show up in renoise. I then tried symlinking to /usr/lib/dssi (maybe renoise forgot to look in /usr/local) atte@blokhus:~$ ll /usr/lib/dssi/ total 1.1M drwxr-xr-x 2 root root 4.0K Jun 5 10:21 calf -rw-r--r-- 1 root root 955K May 17 2012 calf.so drwxr-xr-x 2 root root 4.0K Jun 5 09:57 fluidsynth-dssi -rw-r--r-- 1 root root 22K Jul 19 2011 fluidsynth-dssi.so -rw-r--r-- 1 root root 8.1K Dec 3 2011 karplong.so drwxr-xr-x 2 root root 4.0K Jun 5 10:19 less_trivial_synth -rw-r--r-- 1 root root 12K Dec 3 2011 less_trivial_synth.so lrwxrwxrwx 1 root root 42 Jul 12 00:48 libzynaddsubfx_dssi.so -> /usr/local/lib/dssi/libzynaddsubfx_dssi.so drwxr-xr-x 2 root root 4.0K May 29 11:41 nekobee -rw-r--r-- 1 root root 74K Apr 14 2011 nekobee.so drwxr-xr-x 2 root root 4.0K Jun 5 10:19 trivial_sampler -rw-r--r-- 1 root root 11K Dec 3 2011 trivial_sampler.so -rw-r--r-- 1 root root 5.7K Dec 3 2011 trivial_synth.so Still no luck :-( Any ideas? Anybody using the dssi version of zynaddsubfx? -- Atte http://atte.dk http://modlys.dk

12 years, 4 months

maximum input level, or normalization and dc offset correction?

by Rusty Perez

Hi list, I know this is a contravercial subject, but I'd like to hear some viewpoints. I use a delta 1010lt card. I'm wondering if I should carefully set my input levels for each input source, or, if the digital convenience of normalizing and dc ofset makes up for level defficiencies, without adding noise. I know the concern here is signal to noise ratio. Would my delta add noise if I boosted input levels initially or, in normalizing, am I just boosting the audio with the snr which I would have recordedif I had boosted my input levels in the first place? Does that make sense? Thanks! Rusty

12 years, 4 months

[a bit OT] Vocal microphone

by Julien Claassen

Hello! I need to get a vocal microphone. I've had this project several times before, but now I'm decided. There are a couple of alternatives. there is the Shure SM5x and there is the SE-220, if my memory doesn't betray me. Any more suggestions on the topic? I want to pay around 100-200 EUR maximum. This microphone will be meant solely for singing. No instruments to mic. Warm regards and sorry for the OT again Julien ---------------------------------------- http://juliencoder.de/nama/music.html

12 years, 4 months

Re: [LAU] maximum input level, or normalization and dc offset correction?

by Ralf Mardorf

I guess it was off-list by accident?! -------- Forwarded Message -------- From: Ralf Mardorf <ralf.mardorf(a)alice-dsl.net> To: Rusty Perez <rustys.lists(a)gmail.com> Subject: Re: [LAU] maximum input level, or normalization and dc offset correction? Date: Fri, 12 Jul 2013 20:40:23 +0200 On Fri, 2013-07-12 at 11:20 -0700, Rusty Perez wrote: > My question was really more of a question to understand what unwanted > noise I may be adding to my recording, which I'm not hearing, either > because of deficient equipment or deficient hearing. :-) A valid question, but don't care about the dynamic, the real issue with mastering music that should sound as good as possible on as much equipment as possible is the whole mix regarding to frequencies, phases vs mono and stereo. It's unlikely that noise will become an issue, it's more likely that the frequencies are biased or that there will be phasing between the channels. What faders do you use? The analog inputs have an optimized working point, perhaps the digital side then is too high or lower than "optimal". I don't know what positive or negative effects are caused by digital remachining. Keep the level below 0 dBFS, resp. add headroom. Too high in all cases is bad, but even a real too low level might be inaudible. "I never normalize the tracks in the DAW when mixing. I can't do it with my analog machine, so I don't do it with my DAW." - Ricardus Vincente and we can use the volume control of our amps to make the music louder and quieter. However, optimal leveling at recording time is better, than postprocessing. Analogy: If a recording does miss frequencies, you can't raise the missing frequencies, you only can rase frequencies that are there, but to silent, but this will come with side effects.

12 years, 4 months

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Linux-audio-user