Linux-audio-user August 2017

linux-audio-user@lists.linuxaudio.org

39 participants
47 discussions

by Jaromír Mikeš

Hi list, I am searching for tool that would allowed me to align sound system. I would like send sound impulse to one speaker and get delay time (ms) based on captured signal by measurement mic. For top speakers impulse could be about 2.5 kHz I guess. A bit more complicated situation could be for aligning top speaker and subs probably impulse of crossover frequency would be necessary. That mean 60Hz 80Hz or 100Hz depend on system XO. Any suggestion how to achieve this? GUI CLI whatever? best regards mira

8 years, 1 month

Re: [LAU] How to recover from a JACK freeze?

by Kjetil Matheussen

> > From: James Harkins <jamshark70(a)zoho.com> > To: "linux-audio-user" <linux-audio-user(a)lists.linuxaudio.org> > Subject: [LAU] How to recover from a JACK freeze? > Message-ID: <15df368d100.cbae553a56821.8435360232489998174(a)zoho.com> > Content-Type: text/plain; charset="UTF-8" > > Hi, been inactive for a while. > > I just up/cross-graded to Ubuntu Studio 16.04 -- very much enjoying it so > far! I'm getting better USB audio performance than I could ever manage > under plain Ubuntu (provided WiFi is off, but I can live with that for > shows). > > One problem that the upgrade didn't solve is that sometimes jackd gets > stuck and it can't be killed. > > Initial symptom: No audio, in or out. > > Secondary symptom: In qjackctl, the CPU usage number is frozen -- never > changes. > > At that point: > > $ ps x | grep jackd > 3140 ? SLsl 0:16 /usr/bin/jackd -dalsa -r44100 -p1024 -n2 -D > -Chw:Set,0 -Phw:Set > 4458 pts/1 S+ 0:00 grep --color=auto jackd > $ kill -9 3140 > $ ps x | grep jackd > 3140 ? SLsl 0:16 /usr/bin/jackd -dalsa -r44100 -p1024 -n2 -D > -Chw:Set,0 -Phw:Set > 4460 pts/1 S+ 0:00 grep --color=auto jackd > > "kill -9" has no effect. > > "sudo kill -9" has no effect. > > If I reboot, it takes several minutes for the system to shut down -- i.e., > jackd is even preventing a clean shutdown. > > So, the question: How do I regain control when this happens? (Ideally, > without having to close everything.) > > Pretty sure I've seen the same thing a few times, and the solution has been to reload the sound card driver. Here's my script to do that: [kjetil@localhost ~]$ more bin/startdelta.sh #!/bin/sh fuser -fv /dev/snd/* /dev/dsp* /home/kjetil/bin/removealsa.sh # see below sleep 1 /home/kjetil/bin/alsasound start # ccrma dist script modprobe snd-ice1712 # change to your sound card #modprobe snd-hda-intel modprobe snd-seq chmod 777 /dev/snd/seq alsactl restore 0 fuser -fv /dev/snd/* /dev/dsp* [kjetil@localhost ~]$ more bin/removealsa.sh #!/bin/sh killall -9 pulseaudio rmmod snd_hda_codec_atihdmi snd_hda_codec snd_hwdep snd_pcm snd_timer snd soundcore snd_page_alloc rmmod snd_seq snd_timer snd_seq_device snd_seq_dummy snd-ice1712 snd_ice17xx_ak4xxx snd_ak4xxx_adda snd_hda_intel snd_cs8427 snd_hda_codec snd_ac97_codec snd_hwdep snd_seq snd_pcm ac97_bus snd_i2c snd_mpu401_uart snd_rawmidi snd_seq_device snd_timer snd soundcore snd_page_alloc sleep 1 rmmod snd_hda_codec_atihdmi snd_hda_codec snd_hwdep snd_pcm snd_timer snd soundcore snd_page_alloc rmmod snd_seq snd_timer snd_seq_device snd_seq_dummy snd-ice1712 snd_ice17xx_ak4xxx snd_ak4xxx_adda snd_hda_intel snd_cs8427 snd_hda_codec snd_ac97_codec snd_hwdep snd_seq snd_pcm ac97_bus snd_i2c snd_mpu401_uart snd_rawmidi snd_seq_device snd_timer snd soundcore snd_page_alloc rmmod snd_seq_midi,snd_seq_dummy,snd_ice1712,snd_ak4xxx_adda,snd_cs8427,snd_ac97_codec,snd_seq,snd_pcm,snd_timer,snd_i2c,snd_mpu401_uart,snd_rawmidi,snd_seq_device rmmod snd_seq_midi,snd_seq,snd_timer,snd_rawmidi,snd_seq_device rmmod snd_seq_midi_event snd-seq-midi snd-seq snd-timer snd-rawmidi snd-seq-device rmmod snd_seq_oss snd_seq_midi_event snd_pcm_oss snd_seq snd_seq_device snd_pcm snd_timer snd_page_alloc snd_mixer_oss rmmod snd_hda_codec_realtek snd_hda_codec_via snd_hda_codec snd_hwdep snd_pcm snd_timer rmmod snd_hda_codec snd_hwdep snd_pcm snd_timer rmmod snd_via82xx snd_hda_codec snd_hwdep snd_ac97_codec snd_mpu401_uart snd_rawmidi snd_seq_device snd_pcm snd_timer snd_page_alloc soundcore rmmod snd

8 years, 1 month

Digigram VX222e not seen as card

by Sam Mulvey

A radio station I'm working on has a machine with a Digigram VX222e connected to it. According to the Digigram site and ALSA, the sound card is supported by ALSA. Unfortunately, it doesn't appear to be detected as a sound card. Reading online, it requires some firmware, but it appears that my system has the proper firmware installed. The VX222e is a PCIe card, but it appears to be PCI on the card with a PCIe to PCI bridge. According to Digigram's support site, they made a hardware change in March of 2017, and I suspect that this might be the problem. I'm guessing it might be as simple enough as an ID match that I need to add to a module, but I've never worked with the card before, and I'm a little stuck. I've posted lspci, dmesg and the like on this page in order to not clutter up the list: https://vis.nu/blog/digigram_vx222e_isn_t_seen_in_arch_linux Any pointers would be really helpful. Thanks! -Sam

8 years, 1 month

Re: [LAU] Speakers alignment

by Jaromír Mikeš

2017-08-15 15:32 GMT+02:00 Michael Squires <michael.leslie.squires(a)gmail.com >: > > > On 8/15/17 8:56 AM, Jaromír Mikeš wrote: > > Hi list, > > I am searching for tool that would allowed me to align sound system. > I would like send sound impulse to one speaker and get delay time (ms) > based on captured signal by measurement mic. > For top speakers impulse could be about 2.5 kHz I guess. > A bit more complicated situation could be for aligning top speaker and > subs probably impulse of crossover frequency would be necessary. > That mean 60Hz 80Hz or 100Hz depend on system XO. > > Any suggestion how to achieve this? GUI CLI whatever > > > The human ear can hear this quite well, I understand. I have a Behringer > crossover with adjustable delay built in and I think there's a procedure to > do this in the manual. > > There are also software for speaker testing and design that I've seen. > The most complete seems to be available from Parts Express. I've also seen > software packages with things like waterfall displays available for the PC. > Mike Squires > Hi Mike, thank you for suggestions, but only what I am searching for is to measure delay in ms for impulse from two sources. Most close what I've found is Fon's Jack_Delay which measure sound card latency for set of tones. http://kokkinizita.linuxaudio.org/linuxaudio/index.html (scroll down the page) Only difference is I don't want link input and output of sound card, but play to speaker and capture sound in mic. And I would probably should just one tone instead of set. best regards mira

8 years, 1 month

Re: [LAU] Monitor for usage with Ardour.

by David Jones

On Jul 30, 2017 10:06, Jannis Achstetter <jannis_achstetter(a)web.de> wrote: > > Hi list, > > Am 26.07.2017 um 17:42 schrieb Ralf Mardorf: > > > Could somebody recommend a monitor <= 300,- €? At the moment I tend to > > buy the Eizo or the LG. For usage with Ardour, as well as averaged > > desktop usage, IOW office, browser etc.. > > I don't know how your opinion about that is but I personally would > recommend to buy a used piece of higher priced equipment. The only > downside of this might be a bit higher power consumption but if you used > to have a CRT it should be an improvement anyways. I got myself a used > Dell UltraSharp 2408WFP for about ~200€ several years ago and I'm still > perfectly happy with it. > > Since you seem to know german pretty well you might want to have a look > here: > https://www.itsco.de/monitore/tft-lcd-monitore/ab-24-zoll-tft-lcd-monitore > > (I'm in no way related to that company, I'm not getting any money to > recommend them :) > > Best regards, > Jannis The Dell 27 inch LED monitors are very good. I saw one listed in this search for US$199: https://www.amazon.com/s/ref=nb_sb_ss_c_1_13?url=search-alias%3Daps&field-k… David W. Jones gnome(a)hawaii.rr.com authenticity, honesty, community http://dancingtreefrog.com

8 years, 1 month

Event Announcement: Sonoj Convention (4th/5th of November 2017, Cologne, Germany) - Music Production and Open Source Software

by info＠sonoj.org

I want to share with you an upcoming event. I would like to ask you to please take notice and help spreading the word by using the notice below for sharing or writing your own announcement. Thank you, Nils Hilbricht on behalf of the Sonoj Team Name of the event: Sonoj Convention Date: 4th and 5th of November 2017 Website: https://www.sonoj.org Location: Cologne, Germany Admission Free - Registration mandatory, limited to 50 visitors The Sonoj Convention is an event on the 4th and 5th of November 2017 in Cologne, Germany. Admission is free. You will be able to enjoy demonstrations, talks and workshops about music production through open source software. Hands-on tutorials and workflow presentations can be expected. The Sonoj Convention is a great opportunity to meet like-minded people, maybe even to have engaging discussions! Every man and woman is welcome, no matter your musical or technological background. An event like the Sonoj Convention does not exist yet. While commercial and closed-source products have plenty of platforms the open source, and sometimes hobbyist, scene does not. The official website https://www.sonoj.org offers a simple way to register as a visitor for free as well as more information, such as an overview of our talks, demonstrations and workshop (e.g. "Boring Music and How to Make it Interesting" or "Creating a Radio Drama with Ardour (for Beginners)"). If you can't attend personally but want to support the convention you can donate to our small fundraising-campaign ("Donation" on the website) and help covering our expenses.

8 years, 1 month

Pocket Guitarix?

by Tim

Hi list. My needs: Guitarix Battery powered 2 Hr or better run time Pocket sized For live use Latency <= 128 frames (at say 44.1Khz) Are there any pre-built units for this sort of thing out there? If not, I'd take a small embedded board, hopefully with enough room for stereo audio jacks, but I'll take mono. A midi in jack would be nice. Any one experienced with this? What is the state of phones these days for real-time audio? Is Guitarix doable? What about input and output jacks? Thanks. Tim.

8 years, 1 month

Re: [LAU] ShowQ - "a QLAB for Linux"

by Peter P.

Hi Michael CCing LAU list, * Michael Jarosch <riotsound(a)riotmusic.de> [2017-08-03 13:47]: > Am Donnerstag, den 03.08.2017, 02:44 +0200 schrieb Peter P.: > > > Thanks for your reply! I did build it myself from the latest git > > checkout and it did produce the same error. > > Damned! > Guess, if you'd contact Errol he wouldn't tell you something else than > he wrote in the bugreport... The question is: How to startup ShowQ > without jack-midi, right? Unfortunately, I don't know... I was wondering how to contact him (without gettig a github account) as I can't find an email address of his. The suggested reason for this problem was given as "ShowQ is connecting to Jack ports and does not care if they are audio or MIDI." In my case ShowQ lists the two jack audio ports (sinks) that my soundcard provides and makes audio connections to them. No midi connections are made. Dear list, does anyone know how I could debug or even fix this by using jackd tools/commands? thank you so much! P

8 years, 1 month

A defence of the straight line

by Will Godfrey

Warning: I've been thinking! There seems to be a trend in recent years for everything to be represented in various curves. They are very pretty and (possibly) technically more correct, but is that what the user wants? Take a simple amplitude envelope for example, showing intensity V time. Now that is often shown as a logarithmic curve, but the whole idea behind such a curve was to give our ears a *linear* impression of intensity change, so why do we now give our ears one impression but our eyes something completely different? -- Will J Godfrey http://www.musically.me.uk Say you have a poem and I have a tune. Exchange them and we can both have a poem, a tune, and a song.

8 years, 1 month

FFMPEG - Recording sound from jack

by list

Hello. Debian 9 - Stretch. ffmpeg version 3.2.5-1 I run Jackd from Qjackctl jackd2 1.9.10+20150825git1ed50c92~dfsg-5 cat /proc/asound/cards 1 [AVB ]: USB-Audio - UltraLite AVB MOTU UltraLite AVB at usb-0000:00:1a.7-5, high speed aplay -l **** Liste des Périphériques Matériels PLAYBACK **** carte 1: AVB [UltraLite AVB], périphérique 0: USB Audio [USB Audio] Sous-périphériques: 0/1 Sous-périphérique #0: subdevice #0 When i try to record my screen i use : ffmpeg -f x11grab -s 1920x1080 -r 25 -i :0.0 00screencast.mp4 And it's working great. But, when i try to add the sound.... no success ffmpeg -f alsa -ac 2 -i hw:1 -f x11grab -s 1920x1080 -r 25 -i :0.0 00screencast.mp4 [alsa @ 0x563a80c18b60] cannot open audio device hw:1 (Device or resource busy) hw:1: Input/output error arecord -l **** Liste des Périphériques Matériels CAPTURE **** carte 1: AVB [UltraLite AVB], périphérique 0: USB Audio [USB Audio] Sous-périphériques: 0/1 Sous-périphérique #0: subdevice #0 arecord -L null Discard all samples (playback) or generate zero samples (capture) default jack sysdefault:CARD=AVB UltraLite AVB, USB Audio Default Audio Device front:CARD=AVB,DEV=0 UltraLite AVB, USB Audio Front speakers surround21:CARD=AVB,DEV=0 UltraLite AVB, USB Audio 2.1 Surround output to Front and Subwoofer speakers surround40:CARD=AVB,DEV=0 UltraLite AVB, USB Audio 4.0 Surround output to Front and Rear speakers surround41:CARD=AVB,DEV=0 UltraLite AVB, USB Audio 4.1 Surround output to Front, Rear and Subwoofer speakers surround50:CARD=AVB,DEV=0 UltraLite AVB, USB Audio 5.0 Surround output to Front, Center and Rear speakers surround51:CARD=AVB,DEV=0 UltraLite AVB, USB Audio 5.1 Surround output to Front, Center, Rear and Subwoofer speakers surround71:CARD=AVB,DEV=0 UltraLite AVB, USB Audio 7.1 Surround output to Front, Center, Side, Rear and Woofer speakers iec958:CARD=AVB,DEV=0 UltraLite AVB, USB Audio IEC958 (S/PDIF) Digital Audio Output dmix:CARD=AVB,DEV=0 UltraLite AVB, USB Audio Direct sample mixing device dsnoop:CARD=AVB,DEV=0 UltraLite AVB, USB Audio Direct sample snooping device hw:CARD=AVB,DEV=0 UltraLite AVB, USB Audio Direct hardware device without any conversions plughw:CARD=AVB,DEV=0 UltraLite AVB, USB Audio Hardware device with all software conversions ffmpeg -f alsa -ac 2 -i plughw:1 -f x11grab -s 1920x1080 -r 25 -i :0.0 test.mp4 [alsa @ 0x55be84165b60] cannot open audio device plughw:1 (Device or resource busy) plughw:1: Input/output error Any advices, feeback, experiences.... ? All the best.

8 years, 1 month

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Linux-audio-user August 2017