Linux-audio-user January 2011

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Re: [LAU] IR: LV2 Convolution Reverb

by Kim Cascone

15 years

[LAU] Can't capture sound.

by S. Massy

Hi, I'm writing on the off-chance that someone else has encountered this problem or has an inkling of how it could be solved. I have a Mac Mini and would like to use the line-in jack to perform some very simple voice recording. When enabling Line monitoring in alsamixer, I can hear the input fine, but no amount of fiddling with arecord has yet enabled me to capture any audio. There are three subdevices, and I have all set them to line input with capture switch to true. Then, I've done $ arecord -D hw:0,[0-2] -f cd test[0-2].wav ...but to no avail. It's not of deadly importance, but it does drive me crazy that I can monitor the input and yet not capture it. Any ideas? Cheers, S.M.

15 years

[LAU] [ANN] IR: LV2 Convolution Reverb

by Tom Szilagyi

Hi all, Standing on the shoulders of giants[*], I am pleased to announce the public release of IR, a convolution reverb in the LV2 plugin format. Released as free software under the GNU GPL, this easy to use plugin has been created to open the fascinating world of convolution reverb to Linux-based audio engineers. If you use Ardour to create, mix & produce music, you will most probably want to check out this plugin. Assorted features: * Zero-latency operation * Support for mono, stereo and 'True Stereo' (4-channel) impulses * Realtime operation * Very reasonable CPU consumption * Maximum impulse length: 1M samples (~22 seconds @ 48kHz) * Loads a large number of audio file formats * High quality sample rate conversion of impulse responses * Stretch control (via high quality SRC in one step integrated with impulse loading) * Pre-delay control (0-2000 ms) * Stereo width control of input signal & impulse response (0-150%) * Envelope alteration with immediate visual feedback: Attack time/percent, Envelope, Length * Reverse impulse response * Autogain: change impulses without having to adjust 'Wet gain' * Impulse response visualization (linear/logarithmic scale, peak & RMS) * Easy interface for fast browsing and loading impulse responses IR should work on Linux with Ardour 2.8.x (x >= 11) and 3. For further info and source code download, please visit the plugin's homepage: http://factorial.hu/plugins/lv2/ir Thanks, Tom [*] Fons Adriaensen (zita-convolver), Erik de Castro Lopo (libsndfile, libsamplerate)

15 years

[LAU] -ck patch

by Raffaele Morelli

Hi you all, what do you think about that? Have you got some personal experience? http://ck-hack.blogspot.com/2010/10/bfs-in-real-time.html Regards Raffaele -- *L'unica speranza di catarsi, ammesso che ne esista una, resta affidata all'istinto di ribellione, alla rivolta non isterilita in progetti, alla protesta violenta e viscerale.*

15 years

Re: [LAU] [ANN] IR: LV2 Convolution Reverb

by Tom Szilagyi

On 14 January 2011 01:55, Leigh Dyer <lsd(a)wootangent.net> wrote: > > I've just tested a few exports on my dual-core laptop, and the reverb came > through fine in all cases, so either it works fine, or I'm just lucky :) > We'll see how it goes in the real world in the future. > > I've found one minor issue, though -- the ".ir_save" file appears not in my > home directory, but in the working directory that the host (tested with both > Ardour and Qtractor) was launched from. If I re-launch the host from the > same folder it picks up the saved settings just fine, but if I launch it > from a different folder, it's unable to load the bookmarks or the selected > IR file. Thanks for noticing this, I could reproduce the issue (and will fix it ASAP). I also received some important advice from Fons offlist, regarding the usage of zita-convolver that is especially relevant when running on a multiprocessing machine. In that case the code may leak large amounts of memory on reinitialising the convolution engine (every time you load an impulse, or change a parameter). I haven't had a chance to check this, so please be aware of this possibility. I know how to fix it (thanks to Fons) and will do so very soon. So please stay tuned for an updated, corrected version, should come in a few days (I have to get a multicore system for testing and set it up)... Thank you all for the patience and the nice comments, Tom

15 years

[LAU] pyliblo: valid address to send OSC?

by Pablo Fernández

Hi! I am trying to send OSC messages to ardour by means of send_osc, included in debian/ubuntu package pyliblo-tools (http://das.nasophon.de/pyliblo/) . I always get the message "liblo.AddressError: address error: invalid URL" unless I am in the same computer that runs ardour and just enter the UDP port number that ardour uses to receive OSC messages. For example, this works: send_osc 3819 /ardour/access_action Common/About However, from my other computer in the same network, this: send_osc 192.168.0.192:3819 /ardour/access_action Common/About results in: liblo.AddressError: address error: invalid URL '192.168.0.192:3819' I have tried other options to no avail and the man page and pyliblo examples didn't help me. What is the right syntax in pyliblo outside the localhost for a given UDP port? Thanks in advance, Pablo

15 years

Re: [LAU] [ANN] IR: LV2 Convolution Reverb

by Dragan Noveski

On 13.01.2011 22:44, Tom Szilagyi wrote: > Ok, thanks, I think I got it now. > could you please try overwriting ir_gui.cc with the one attached& test? > thanks! > it seems to be working now. i got another crash when trying to remove the plugin with shift+rightclick in the ardour editor window, but i cannot reproduce it for now. i ll let you know, if i found out some other troubles. cheers, doc

15 years

Re: [LAU] [ANN] IR: LV2 Convolution Reverb

by Dragan Noveski

On 13.01.2011 20:57, Tom Szilagyi wrote: > please try this: > > replace the function ir_wavedisplay_set_message() in ir_wavedisplay.cc to this: > > void ir_wavedisplay_set_message(IRWaveDisplay * w, const char * msg) { > if (!values || !length) { > return; > } > IRWaveDisplayPrivate * p = IR_WAVEDISPLAY_GET_PRIVATE(w); > p->msg = msg; > if (msg) { > ir_wavedisplay_redraw(w); > } > } > > then recompile, reinstall& see if it still crashes. > > Thatks, > Tom > tom ,thanks for the fast response. when i do the mentioned it does not compile anymore: g++ ir_wavedisplay.cc -Wall -I. -I/usr/include `pkg-config --cflags gtk+-2.0` `pkg-config --cflags gthread-2.0` -D__STDC_FORMAT_MACROS -O2 -ffast-math -D_HAVE_GTK_ATLEAST_2_20 -c -fPIC -o ir_wavedisplay.o ir_wavedisplay.cc: In function 'void ir_wavedisplay_set_message(IRWaveDisplay*, const char*)': ir_wavedisplay.cc:278: error: redefinition of 'void ir_wavedisplay_set_message(IRWaveDisplay*, const char*)' ir_wavedisplay.cc:253: error: 'void ir_wavedisplay_set_message(IRWaveDisplay*, const char*)' previously defined here ir_wavedisplay.cc:279: error: 'values' was not declared in this scope ir_wavedisplay.cc:279: error: 'length' was not declared in this scope make: *** [ir_wavedisplay.o] Fehler 1 nowhiskey@murija5:~/Desktop/src/ir.lv2$ cheers, doc > > On 13 January 2011 20:31, Dragan Noveski<perodog(a)gmx.net> wrote: > >> thanks for the announce. >> >> unfortunatelly a2 and a3 are crashing here on the plugin: >> >> >> http://tracker.ardour.org/view.php?id=3711 >> >> cheers, >> doc >> >> >

15 years

[LAU] Ardour connections

by Goran Mekić

I've tested ardour2 and ardour3. What happens is that I save the session with one track, and when I close ardour and open it again, the track is connected to more inputs and outputs then it was when I've hit save. I use jackdbus + M-Audio Delta 1010LT. Is there any other info I should give? Thanx!

15 years

[LAU] OT: Electronic Music Degrees?

by Josh Lawrence

minimal background: I went to college when I was 18, and in my youth and stupidity, wasted the opportunity. I went to work in the IT field and have done reasonably well, but the 8 - 5 corporate grind is destroying my soul. I'm now 35 and have a family. is there such a thing as electronic music-related degrees (undergrad) in the US? or, are there composition degrees that primarily focus on electronic methods? I'm considering going back to school, and I would like to investigate this possibility, if it exists. sorry for the off-topic post. thanks, Josh -- Josh Lawrence www.hardbop200.com

15 years

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Linux-audio-user January 2011