Linux-audio-user

linux-audio-user@lists.linuxaudio.org

6 participants
20644 discussions

by Jeanette C.

Hey hey, I know it's not specifically on Linux anymore, but does anyone know fi the VLC for mobile player can play music based on folders rather than tags? I had a look, but couldn't find anything on an idevice. Alternatively: is there perhaps another soltuion for a portable player that will be mounted on Linux and speak? I had a Rockbox enabled player for a while, but it's dying and the players that are usable to me and support Rockbox are a dying breed. Best wishes and TIA, Jeanette -------- * Website: http://juliencoder.de - for summer is a state of sound * SoundCloud: https://soundcloud.com/jeanette_c * Youtube: https://www.youtube.com/channel/UCMS4rfGrTwz8W7jhC1Jnv7g * GitHub: https://github.com/jeanette-c * Twitter: https://twitter.com/jeanette_c_s When you need someone, you just turn around and I will be there <3 (Britney Spears)

6 years, 11 months

mpv af channelmap help

by Jeanette C.

Hey hey, I've been trying to insert an audiofilter in mpv, through the commandline and failed miserably. Can you help? the only thing I wished to do is reverse the stereo channels, because my amp is actually plugged in the wrong way round and I can't change it. From my understanding of the help I typed: mpv --af channelmap:map="0,1,1,0":channeml_layout=2 file.wav The channelmap can't be parsed. Whatever I do. I can get a mono output with just one number. I also get some output with two numbers seperated by a dash "-", but no more. I also tried just giving two comma seperated numbers, i.e. only the new order of the input channels. I'd be grateful for a working example. My shell is bash. Best wishes, Jeanette -------- * Website: http://juliencoder.de - for summer is a state of sound * SoundCloud: https://soundcloud.com/jeanette_c * Youtube: https://www.youtube.com/channel/UCMS4rfGrTwz8W7jhC1Jnv7g * GitHub: https://github.com/jeanette-c * Twitter: https://twitter.com/jeanette_c_s Cinderella's got to go <3 (Britney Spears)

6 years, 11 months

Soundcraft Notepad 12 FX audio interface

by Carlo Ascani

Hi all, I am considering a Soundcraft Notepad 12 FX [1] as my main laptop audio interface. Is anyone aware about its Linux compatibility and software reliability? Being able to do some multi track recording would be awesome. Cheers [1] https://www.soundcraft.com/en-US/products/notepad-12fx -- Carlo Ascani aka 2pxSolidBlack https://2pxsolidblack.gitlab.io iam2pxsolidblack@freenode

6 years, 11 months

'Arrange' not available in Catia?

by Jonathan E. Brickman

I am finding Canvas/Arrange not available in Catia, have been using Patchage instead. Anyone know how to get Canvas/Arrange to work in Catia? I am recompiling both using yaourt in in Manjaro. -- Jonathan E. Brickman jeb(a)ponderworthy.com (785)233-9977 Hear us at ponderworthy.com -- CDs and MP3 available! Music of compassion; fire, and life!!!

6 years, 11 months

Impulse Resonance Reverbs

by hgn

Hello LAU list, I would like to get an overview what impulse resonance reverbs exist in Linux, in which format and which is the highest quality (sound & performance). I am not 100% sure if that is even the right term; what I mean is a reverb where you load a sound file that the reverb program uses to calculate the reverb of a signal. Do you have recommendations which are good? Do you have recommendations which programs are bad? Greetings, hgn

6 years, 11 months

command line midi processing

by Francesco Ariis

Hello LAU, lately I have been playing with ABC notation [1]. ABC outputs to postscript/PDF and MIDI (a good output), but there some things I would like to change in automatic fashion. Example: anticipate the attack on some channels (string). Is there a command line Linux utility to mess with midi files, similar to what ImageMagick is for images? I know plenty of libraries in many programming languages, but before diving into those I would like not to reinvent the wheel. [1] http://trillian.mit.edu/~jc/music/abc/doc/ABCtut_Intro.html

6 years, 11 months

spectmorph-0.4.1

by Stefan Westerfeld

spectmorph-0.4.1 has been released. Overview of Changes in spectmorph-0.4.1: ---------------------------------------- * macOS is now supported: provide VST plugin for macOS >= 10.9 * Include instruments in source tarball and packages * Install instruments to system-wide location * New Instruments: Claudia Ah / Ih / Oh (female version of human voice) * Improved tools for instrument building - support displaying tuning in sminspector - implement "smooth-tune" command for reducing vibrato from recordings - minor encoder fixes/cleanups - smlive now supports enable/disable noise * VST plugin: fix automation in Cubase (define "effCanBeAutomated") * UI: use Source A / Source B instead of Left Source / Right Source * UI: update db label properly on grid instrument selection change * Avoid exporting symbols that don't belong to the SpectMorph namespace * Fix some LV2 ttl problems * Fix locale related problems when using atof() * Minor fixes and cleanups What is SpectMorph? ------------------- SpectMorph is a free software project which allows to analyze samples of musical instruments, and to combine them (morphing). It can be used to construct hybrid sounds, for instance a sound between a trumpet and a flute; or smooth transitions, for instance a sound that starts as a trumpet and then gradually changes to a flute. SpectMorph ships with many ready-to-use instruments which can be combined using morphing. SpectMorph is implemented in C++ and licensed under the GNU LGPL version 3 Integrating SpectMorph into your Work ------------------------------------- SpectMorph is currently available for Linux and Windows users. Here is a quick overview of how you can make music using SpectMorph. - VST Plugin, especially for proprietary solutions that don't support LV2. (Available on Linux and 64-bit Windows) - LV2 Plugin, for any sequencer that supports it. - JACK Client. - BEAST Module, integrating into BEASTs modular environment. Note that at this point, we may still change the way sound synthesis works, so newer versions of SpectMorph may sound (slightly) different than the current version. Links: ------ Website: http://www.spectmorph.org Download: http://www.spectmorph.org/downloads There are many audio demos on the website, which demonstrate morphing between instruments. -- Stefan Westerfeld, Hamburg/Germany, http://space.twc.de/~stefan

6 years, 11 months

Best filter for reducing condenser mic "crash" impact outdoors?

by David Kastrup

Hi, what do people use for damage control (prevention likely is a case for deadcats though I am not sure whether their absorption may be too much for this application) when condenser mics occasionally "plop" due to wind? One can hear this effect a few times on the outdoors "wasp" video <https://youtu.be/vKCdTh7h8f8> between 5:00 and the end (5:22). What I tried in that recording is using a high pass filter (at about 100Hz) with "Soft limiter" which supposedly maps something like -3dB to +∞dB to -3dB to 0dB. I think it was "Invada". The result is still unpleasant. Are there any better approaches, like some sort of smooth gating? As a note aside, I got really annoyed at snd_oxfw (Firewire via ALSA, no Ffado available) for a Mackie Onyx Satellite. At 96kHz sample frequency, xruns using Ardour about once per minute. Don't remember this being the case when I tried last time (with a Thinkpad T61 and an older CPU). Regardless whether using the built-in Ricoh Firewire controller of a T420, or an Expresscard controller with TI chip, using Jack or not, connected to mains power or not. I finally threw in the towel and used the analog TLR outputs on the Satellite into an RME Hammerfall (via Expresscard-to-Cardbus Adapter). I am not sure I really was satisfied with the result: I suspect that it went through A/D+D/A already before arriving at Main Out of the Satellite. The video from that attempt was sort of badly lit so I ultimately ditched it anyway. The one linked above was instead recorded with an Alesis iO|14 audio card, using Ffado and Jack (this requires blacklisting the ALSA Bebob driver which only produced hacked-up audio last time I tried it). I did not want to move my regular equipment (a large Mackie Onyx mixer) into the yard and at least had the Alesis still around from earlier experiments. I actually found the noise level of the Alesis a bit nicer than when using the Satellite preamps, but then the Satellite produces lacklustre phantom voltage (something like 35V or so). A final note on the mics (leaving the Linux-specific realm): I used hypercardioid Oktava MK-012 capsules (I think 0.5" diameter membranes). Would cardioid or even omni be less sensitive to wind as a rule? Or is this a solid "it depends" or "naaah"? All the best, thanks for any hints -- David Kastrup

6 years, 11 months

System Configuration: kernel, CPU frequency, hardware timers

by Kevin Cosgrove

Hi folks, Back in 2012 I scripted some post-installation customization for when I would build a new Linux machine. I suspect that all of what I did is no longer needed for today's systems. I'm writing to see if someone can confirm that. What I did came from these links: https://wiki.linuxaudio.org/wiki/system_configuration#the_kernel https://wiki.linuxaudio.org/wiki/system_configuration#cpu_frequency_scaling https://wiki.linuxaudio.org/wiki/system_configuration#hardware_timers My new system runs the 4.17.17 kernel along with the rest of Fedora-27. What do you think? Do I need to taylor the new machine in the above ways? Thanks! P.S.: My script is below, for the curious. #!/bin/sh # $Id: 36-linux_musicians,v 1.4 2012/11/16 05:56:14 kevinc Exp $ DATE=`date +%F-%T` # http://wiki.linuxmusicians.com/doku.php?id=system_configuration#the_kernel sudo cp /etc/default/grub /etc/default/grub-${DATE} sudo cp /boot/grub2/grub.cfg /boot/grub2/grub.cfg-${DATE} # cp /etc/default/grub grub sudo perl -p -i -e 's/(^GRUB_CMDLINE_LINUX=\"nomodeset.*rhgb) quiet$\"/$1 quiet threadirqs\"/' /etc/default/grub sudo /sbin/grub2-mkconfig -o /boot/grub2/grub.cfg # http://wiki.linuxmusicians.com/doku.php?id=system_configuration#cpu_frequen… # echo -n performance \ # | sudo tee /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor sudo touch /etc/rc.d/rc.local cp /etc/rc.d/rc.local rc.local_cpufreq cat << EOF >> rc.local_cpufreq #!/bin/sh for cpu in /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor do echo -n performance > \$cpu done echo 3072 > /sys/class/rtc/rtc0/max_user_freq EOF sudo cp rc.local_cpufreq /etc/rc.d/rc.local sudo chmod 755 /etc/rc.d/rc.local # http://wiki.linuxmusicians.com/doku.php?id=system_configuration#hardware_ti… /bin/rm -f 40-timer-permissions.rules cat << EOF > 40-timer-permissions.rules KERNEL=="rtc0", GROUP="audio" KERNEL=="hpet", GROUP="audio" EOF sudo cp 40-timer-permissions.rules /etc/udev/rules.d/ sudo chmod 644 /etc/udev/rules.d/40-timer-permissions.rules cat << EOF > 60-max-user-freq.conf # High Precision Event Timer for performance audio/MIDI dev.hpet.max-user-freq=3072 EOF sudo cp 60-max-user-freq.conf /etc/sysctl.d/ sudo chmod 644 /etc/sysctl.d/60-max-user-freq.conf cat << EOF > 60-vm.swappiness.conf # Delay start of use of swap partitions vm.swappiness = 10 EOF sudo cp 60-vm.swappiness.conf /etc/sysctl.d/ sudo chmod 644 /etc/sysctl.d/60-vm.swappiness.conf cat << EOF > 93-audio_limits.conf # Increase priority of audio applications # # maximum realtime priority @audio - rtprio 90 # maximum locked-in-memory address space (KB) @audio - memlock 2000000 EOF sudo cp 93-audio_limits.conf /etc/security/limits.d/ sudo chmod 644 /etc/security/limits.d/93-audio_limits.conf exit

6 years, 11 months

libsndfile current info on mp3 support

by Jeanette C.

Hey hey, is there any further information on the mp3 support within libsndfile? More current than Q&A 21 in the FAQ? TIA and best wishes, Jeanette -------- * Website: http://juliencoder.de - for summer is a state of sound * SoundCloud: https://soundcloud.com/jeanette_c * Youtube: https://www.youtube.com/channel/UCMS4rfGrTwz8W7jhC1Jnv7g * GitHub: https://github.com/jeanette-c * Twitter: https://twitter.com/jeanette_c_s I love the things you say And I love the love your touch conveys <3 (Britney Spears)

6 years, 11 months

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Linux-audio-user