Linux-audio-user September 2007

linux-audio-user@lists.linuxaudio.org

130 participants
158 discussions

MIDI active sensing- USB midi and EvoMK461

by Simon Williams

I have just received the usb midi adapter I bought on ebay. I plugged it in and it was recognized immediately- it shows up in lsusb as: Bus 002 Device 014: ID 4348:552d Anyway- if I plug it into my ordinary keyboard or the midi out on my Evolution MK461 then it's very slow and frequently stops and/or plays the wrong notes- theres usually note 0 (very low) attached to any note I get from it. Sending it to aseqdump gives lots of "Active sensing" messages. I don't get these from the MK461s own USB, nor from the old gameport midi adapter I have. Also, key releases on these appear as midi events with note velocity 0, whereas they don't with the usb midi adapter. My first instinct was that USB1 is too slow and it needs USB2, but my MK461 works fine so why would this be any different? The funny thing is- if I select the "midi out from USB" setting on my MK and then route midi events from vkeybd to the MK (which then sends them back through the USB midi adapter plugged into the midi out) then it works as expected, even though the MK itself going through this line does not. Any ideas? Thanks Simon

18 years

Re: ua-25 very noisy in advanced mode

by Pedro Lopez-Cabanillas

On Monday, 10 September 2007 10:55, Joselu?s Cruz wrote: > several places I've looked into: > ps -aexw > lsmod > cp -r /proc/bus/usb/* > cp -r /proc/asound/* > find /etc/ | grep alsa > dpkg -l > ~/.asoundrc > /var/log/messages > /var/log/kern.log > /var/log/debug > /var/log/dmesg > > > If you know more places where I should look I'd be very pleased to > hear it. And when I find the solution to the problem, I'll try to > write it in the alsa-project wiki, ua-25 page. Some common Jack pitfalls? /etc/fstab Where do you mount the /tmp directory? use tmpfs instead a disk partition. /etc/security/limits.conf Give your user or the audio group (where you should belong) realtime priority privileges. Unless you use the (obsolete) realtime-lsm module. Regards, Pedro

18 years

ua-25 very noisy in advanced mode

by Joseluís Cruz

Hello list! I've searched about this issue without success. I hope someone of you smart guys brings me any idea. The problem is: Edirol UA-25 sounds very noisy when in advanced mode. (I need it in advanced mode because in normal mode you can't use the midi ports and the sound quality is limited to 44.1khz 16bit) And when I start jack, I must configure it with 3 periods and 1024 frames minimum to eliminate noises. This is a new Debian Sid installation Ok, now the strange thing is that before reinstalling my system I was able to use the same soundcard in Debian sid, using the the same machine, same hardware, same kernel I'm using now (I recompiled with the same .config) with a very low latency (64 frames 2 period, 48000 hz around 2-4 msec). The only diferent is that I installed it from 0 two days ago. And, I've not lost my previous system. I have it in another partition, so I can take a look to any old-system's configuration file. But I've not found any clues!! Oh! I forgot to mention that some months ago, when I first installing debian I remember having the same problem so I used it in normal mode. But one day I tested advanced mode and it just worked! magically! that is not of much help because I don't know what I did. So I think I've discarded some bad kernel configuration by running my previous kernel. I've even tried recompiling the alsa libraries, and I'm using jack cvs head. do you have any clues? I'm really loosing my mind with this ;) hahaha greetings! joseLuís

18 years

Re: [LAA] [ann] nova filters as ladspa plugins

by Dragan Noveski

Tim Blechmann wrote: > hi dragan, > > >> hi tim, >> i would really like to get your filters running, but i get an error on >> running 'scons': >> > > >> nova/source/dsp/filter.hpp:30:29: error: boost/foreach.hpp: No such file >> or directory >> > > you are probably using boost-1.33, but foreach has been added in > 1.34 ... > > cheers, tim > > hey tim, you are right! i just upgraded to 1.34.1 and the filters are building fine. i very much like the parametric eq - thank you very much for providing this to the community!! cheers, doc

18 years

wav edit program to remove 'dead air'?

by william estrada

Hi guys, I'm looking for a command line program to edit out 'dead air' from a wav file. I want to run it inside a script on a linux system. Also any program that I can use to modify wav files, example, that annoying reverb format. Thanks for your time. -- William Estrada MrUmunhum(a)popdial.com Mt-Umunhum-Wireless.net ( http://Mt-Umunhum-Wireless.net ) Ymessenger: MrUmunhum

18 years

anyone running cecilia succesfully?

by Robert Persson

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Is anyone out there running cecilia successfully? The reason I ask is that it (or at least the package in the ubuntu feisty repos) doesn't seem to work very well and I was wondering if the same was true on other distros. The problems I have had have been of two kinds, the first being bugs in the tcl code for the interface. Only one of these actually caused me a serious problem, but I found a workaround for that (see https://bugs.launchpad.net/ubuntu/+source/cecilia/+bug/138337). However I still get occasional annoying error messages popping up now and then. The other problem I have been having is that some of the modules (in fact most of them, I think) just don't do anything. Nothing comes through the speakers, and if I save the output to disk I get an 82 byte empty aiff file. Among the modules that do work are Transposer, Transposer2 and DelayMod, while among those that don't work are Harmonizer, Warper, Brassage and Convoluter. Is there a way to get these modules working? Or are there other tools around that will do similar jobs to these modules? Robert -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFG45rAyQ3sfGecJBIRAgZdAJ9yQNcbx2extii3ghIQE8vZgdO8UQCfWAik aAy8RlM3WaNlZCVr9xxc7hE= =EEFP -----END PGP SIGNATURE-----

18 years

building snd in ubuntu

by Greg

Has anyone been successful in building snd with motif in ubuntu? I keep getting "can't find the Motif library!" even though i have libmotif-dev installed. --with-motif-prefix=/usr is no help. I tried looking at the configure script but I can't really make heads or tails of all the $variables to figure out where it's actually looking or how.

18 years

Re: [LAA] [ann] nova filters as ladspa plugins

by Dragan Noveski

Tim Blechmann wrote: > hi all, > > i just releases some filters as ladspa plugins, that i originally wrote > for nova, so that they can easily be used from any ladspa-aware > application. > > the filers are: > Low Shelf Filter > High Shelf Filter > Parametric Equalizer > > features: > - based on a mitra-regalia filter topology (like the 4-band parametric > eq filter plugin by Fons Adriaensen) > - up to 16 cascaded steps > - double-precision internal sample representation > - smooth interpolation in case of parameter changes (2205 samples, 50ms > @44100) > > url: https://tim.klingt.org/nova/download/nova_filters-0.1.tar.bz2 > compile-time dependency: boost (array and mpl) > > cheers, tim > > -- > tim(a)klingt.org ICQ: 96771783 > http://tim.klingt.org > > I had nothing to offer anybody except my own confusion > Jack Kerouac > hi tim, i would really like to get your filters running, but i get an error on running 'scons': nowhiskey@murija2:~/software/nove/ladspa/nova_filters-0.1$ scons scons: Reading SConscript files ... Checking for C++ header file boost/mpl/if.hpp... (cached) yes Checking for C++ header file boost/array.hpp... (cached) yes Checking for C++ library stdc++... (cached) yes scons: done reading SConscript files. scons: Building targets ... g++ -o filters.os -c -O3 -fPIC -DNDEBUG -Inova/source filters.cpp In file included from filters.cpp:31: nova/source/dsp/filter.hpp:30:29: error: boost/foreach.hpp: No such file or directory nova/source/dsp/filter.hpp: In constructor 'nova::median_filter<sample_type>::median_filter(size_t)': nova/source/dsp/filter.hpp:599: error: expected primary-expression before '&' token nova/source/dsp/filter.hpp:599: error: 'e' was not declared in this scope nova/source/dsp/filter.hpp:600: error: expected `;' before 'e' nova/source/dsp/filter.hpp: In member function 'void nova::median_filter<sample_type>::resize(size_t)': nova/source/dsp/filter.hpp:617: error: expected primary-expression before '&' token nova/source/dsp/filter.hpp:617: error: 'e' was not declared in this scope nova/source/dsp/filter.hpp:618: error: expected `;' before '{' token nova/source/dsp/filter.hpp:626: error: expected primary-expression before '&' token nova/source/dsp/filter.hpp:626: error: 'e' was not declared in this scope nova/source/dsp/filter.hpp:627: error: expected `;' before '{' token scons: *** [filters.os] Error 1 scons: building terminated because of errors. ......... i compiled boost some times ago, when it become a dependency for building ardour. if it helps: nowhiskey@murija2:~$ locate foreach.hpp /usr/include/boost/test/utils/foreach.hpp cheers, doc

18 years

ardour sync

by Malte Steiner

Hello, I need to sync Ardour (in my case 2.0.5) to an external midisequencer and would like to do it via Midiclock, but so far I know it only supports Midi Timecode which is more heavy datawise.Anyway, last night I tested it a bit following the Ardour doks but didnt managed it yet to react on MTC nor MMC. Any experiences, encouraging words or hints how to make it running, does it work for someone? Thanks in advance, Malte -- Malte Steiner media art + development -www.block4.com-

18 years

Advice for buying speakers

by Leslie P. Polzer

Hi folks, I'm going to move to a new home and want to replace my crummy old setup, which consisted of a very old stereo amp and a collection of assorted speakers. I would like to do the following: * listen to music all over the room (so this probably disqualifies a 5.1 setup?) * do semi-professional audio (voice recordings, singing, guitar, synth with MIDI keyboard) * watch a movie every now and then. That's not really important, though. Is that enough for you to hand me some advice on what to get? Thanks a lot. Leslie

18 years

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Linux-audio-user September 2007