Linux-audio-user July 2015

linux-audio-user@lists.linuxaudio.org

74 participants
61 discussions

by Will Godfrey

As I said at LAC 2015, sometimes we should just let the software do the talking: https://www.youtube.com/channel/UCaNnGAi29CdNJ6S43nmtMfA Enjoy! -- 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.

10 years

Linux Show Player 0.3.1

by Francesco Ceruti

Linux Show Player 0.3.1 is here :) What's new ... - The requested, more complete, Jack support: now in every media-cue the jack-sink output can manage its (8) client ports, the control UI is inspired by QjackCtl. If someone is interested, the audio data are send to jack by the GStreamer "jacksink", Linux Show Player only use a control client to manage the ports connections. - Minor bug fixes. For any issue/bug report use the GitHub issues tracker. Last release: https://github.com/FrancescoCeruti/linux-show-player/releases/latest Project site: http://linux-show-player.sourceforge.net <http://linux-show-player.sourceforge.net/> Code: https://github.com/FrancescoCeruti/linux-show-player

10 years

Outputs on Focusrite Scarlett 18i6 not working

by Ílson Bolzan

Hi, i'm Ílson Bolzan, from Brazil. I'm having problems with my interface, and i'm not sure if they are because of alsa, or jack. The inputs are working fine, but they only work when i'm using the interface in "Audio: Capture Only" otherwise i get the error bellow I've also run alsa-info script, the result can be found in: http://www.alsa-project.org/db/?f=03cc8c5c30232dfdbcd2b86ad8be4f609933d8c1 Can you point if i'm missing something? Thank you so much for your time. --------------------------------------------------------------- 00:20:59.553 Patchbay deactivated. 00:20:59.567 Statistics reset. 00:20:59.572 ALSA connection change. 00:20:59.577 D-BUS: Service is available (org.jackaudio.service aka jackdbus). Cannot connect to server socket err = No such file or directory Cannot connect to server request channel jack server is not running or cannot be started JackShmReadWritePtr::~JackShmReadWritePtr - Init not done for 4294967295, skipping unlock JackShmReadWritePtr::~JackShmReadWritePtr - Init not done for 4294967295, skipping unlock 00:21:07.014 D-BUS: JACK server could not be started. Sorry Cannot connect to server socket err = No such file or directory Cannot connect to server request channel jack server is not running or cannot be started JackShmReadWritePtr::~JackShmReadWritePtr - Init not done for 4294967295, skipping unlock JackShmReadWritePtr::~JackShmReadWritePtr - Init not done for 4294967295, skipping unlock Fri Jul 10 00:21:06 2015: Starting jack server... Fri Jul 10 00:21:06 2015: JACK server starting in realtime mode with priority 10 Fri Jul 10 00:21:06 2015: self-connect-mode is "Don't restrict self connect requests" Fri Jul 10 00:21:06 2015: Acquired audio card Audio1 Fri Jul 10 00:21:06 2015: creating alsa driver ... hw:USB|hw:USB|1024|2|44100|0|0|hwmon|hwmeter|-|32bit Fri Jul 10 00:21:06 2015: Using ALSA driver USB-Audio running on card 1 - Focusrite Scarlett 18i6 USB at usb-0000:03:00.0-2, high speed Fri Jul 10 00:21:06 2015: configuring for 44100Hz, period = 1024 frames (23.2 ms), buffer = 2 periods Fri Jul 10 00:21:06 2015: ALSA: final selected sample format for capture: 32bit integer little-endian Fri Jul 10 00:21:06 2015: ALSA: use 2 periods for capture Fri Jul 10 00:21:06 2015: ALSA: final selected sample format for playback: 32bit integer little-endian Fri Jul 10 00:21:06 2015: ALSA: use 2 periods for playback Fri Jul 10 00:21:06 2015: ERROR: ALSA: cannot set hardware parameters for playback Fri Jul 10 00:21:06 2015: ERROR: ALSA: cannot configure playback channel Fri Jul 10 00:21:06 2015: ERROR: Cannot initialize driver Fri Jul 10 00:21:06 2015: ERROR: JackServer::Open failed with -1 Fri Jul 10 00:21:07 2015: ERROR: Failed to open server 00:21:09.039 Could not connect to JACK server as client. - Overall operation failed. - Unable to connect to server. Please check the messages window for more info. Cannot connect to server socket err = No such file or directory Cannot connect to server request channel jack server is not running or cannot be started JackShmReadWritePtr::~JackShmReadWritePtr - Init not done for 4294967295, skipping unlock JackShmReadWritePtr::~JackShmReadWritePtr - Init not done for 4294967295, skipping unlock Fri Jul 10 00:21:08 2015: Saving settings to "/home/ilson/.config/jack/conf.xml" ... --------------------------------------------------------------------

10 years

Problem with alsa driver compilation script

by Ílson Bolzan

Hi, I'm using Ubuntu 15.04 and was trying to run the script ( http://www.alsa-project.org/alsa-compile.sh) but it was telling me that i don't have 'patch' package installed, but i have it. I found that the problem is because is expected that patch --version | head -1 | cut -d ' ' -f 1 would return 'patch' But instead it return 'GNU', because here the name id "GNU patch" So maybe you could change de script for: patch --version | head -1 | cut -d ' ' -f 1-2 | grep patch -o

10 years

jack 100% CPU when unplugging USB interface

by Peter P.

Hi list, When I unplug my USB Audio interface while jackd is running on that very card, jackd's CPU useage peaks and influences the whole operating system (RT-kernel, jackd's priority is -11) becomes very unresponsive. I know that I should not unplug it while jack is running, but sometimes I forget that jack runs and this almost takes my computer down. So I am wondering if there is any more elegant way of letting jack know that a device has disappeared, or other solution to this. Most looking forward to suggestions, Peter

10 years

OT: Bash help to check new USB keys.

by Kaza Kore

Hi all. I did ask this on the Ubuntu forum roughly a week ago but have had zero helpful replies off the "community" there so I hope you don't mind the off-topic (as far as audio goes) subject here. I have recently bought some large USB keys to use as backup storage to replace my old moving disk external hard drive. Due to the worry of the reports of fakes reporting to be large drives, even when plugged into the system, I wanted to test these before using them for real. Seems best way to do this is fill the drive up and check data for integrity. So first step will be to create a 8GB file which I will copy multiple times. (Why 8GB? No particular reason, except it seems large enough to be useful yet small enough to be manageable. 4GB might be a better choice so it can be used with FAT32 formatted devices.) dd if=/dev/urandon of=~/8gb block=1GB count=8 Then create a little script to copy the file across multiple times. cp8gbx.sh #!/bin/bash i=0 while [ $i -le $1 ] do mkdir /usb_mount_path/$((i++)) dd if=~/8gb of=/usb_mount_path/$i/8gb done ./cp8gbx.sh 15 Hopefully my thinking is correct and that, or something very similar, should copy the file 15 times, once each inside a folder called 1 to 15... Is using dd rather than cp or rsync OK here? Will it automatically wait for one copy/write to finish before starting the next? Is it worth worrying about? Can I do it with && within a script or how would you use the WAIT command otherwise in this instance? Then to do the md5sum on each... md5disk.sh #!/bin/bash i=0 while [ $i -le $1 ] do md5sum /usb_mount_path/$((i++))/8gb >> /usb_mount_path/md5checks done ./md5disk.sh 15 The 15 in the examples above is assuming a 128GB drive. 8*15=120GB. Even though I have used block=1GB rather than block=1G in the creation of the random file, to create a slightly smaller file, I thought the extra space to ensure not attempting to overfill the drive could be a good idea. After all, if they are smaller than advertised I'm thinking a LOT smaller, not just a handful of GBs! I also know there is a way to automatically check if each line in the created file is the same or not and thus only give me a message if there are differences. Bonus points for pushing me in that direction ;) I haven't actually tried or tested any of this, don't know if my syntax is wrong or if my basic thinking is flawed somewhere else. If somebody wouldn't mind having a look over, point out errors, suggest ways you might do it differently, or any other words of advice or hints it would be much appreciated. Thanks for any pointers, Dale.

10 years

Re: [LAU] OT: Bash help to check new USB keys.

by Kaza Kore

Date: Wed, 8 Jul 2015 18:37:04 +0000 From: f.rech(a)yahoo.fr To: dj_kaza(a)hotmail.com Subject: Re: [LAU] OT: Bash help to check new USB keys. It's not a full testing of a flash device I'm worried about, especially as they are new, I just want to know they really are the size they report as being... Dale. Probably GParted will tell you that, HTH, Fred Except the likes of GParted, df, udisks etc are exactly what I don't trust! I have read too many reports of people buying say a 128GB usb drive, copying loads of data onto it and later discovering everything after say 8 or 16GB isn't really there! Somehow they fake the part (ToC? MBR?) which the computer reads the size of the drive from and seems (at least in Doze-land, where most of these reports are from, but then again so is most the computer world) that the system even reports having written the files correctly and they show up in the table of contents and in your file explorer as you would expect. Hence I want to actually write data until the drive is near full and do an md5sum on the files I have written. It's only a single write of the few thousand they should be usable for and I plan to use them predominantly as back-up storage so I don't envisage lots of erase and re-writes over their lifetime. Basic drive integrity isn't a worry. Being sold dodgy, fake components which report the wrong size is. I did wonder if doing something as simple as a full (rather than Quick) format to the likes of ext4 might catch out something like this too... Dale.

10 years

next 'Open Source Audio Meeting Cologne' July the 15th.

by Nils Gey

Hello list, the "Open Source Audio Meeting Cologne" exists now for over a year (founded shortly after the LAC 2014). We meet monthly in form of a user group with small talks and demonstrations as well as Q&A sessions and, of course most important, a strong socializing aspect. Our next meeting is the next Wednesday (the 15th) and are happy to see new (or already known) faces! Maybe you have the time as well and are in the area. This is our website. http://cologne.linuxaudio.org We welcome international visitors without prior registration or announcement. However, due to the meetings location and beeing realistic we expect our regular visitors to speak German. If you want to hold a presentation of any kind this can be done in English of course. So if you are in the area one day please contact me if you want to present your program or anything else related to Linux Audio. Greetings, Nils Cologne

10 years

Re: [LAU] MIDI files played by Gsequencer - Was: Job - Germany - Multimedia hardware Technician with Company Vehicle

by Joël Krähemann

Hi This comes next ;) ags (0.5.1) [ Joël Krähemann (Maintainer of Advanced Gtk+ Sequencer) ] * fixed ags.xsl removed wrong division, note use segmentation to adjust appropriate playback rate * fixed file open dialog callback * ... Visit https://github.com/gsequencer/gsequencer/tree/0.5.0 best regards, Joël On Wed, Jul 8, 2015 at 6:45 PM, Joël Krähemann <jkraehemann(a)gmail.com> wrote: > Hi Ralf > > Is something going wrong? Did you know about reverse mapping ability in > GSequencer or invert tool? > If you're using limited soundfont2, please verify notation shift ... > > > cheers, > Joël > > > On Wed, Jul 8, 2015 at 12:54 PM, Ralf Mardorf <ralf.mardorf(a)alice-dsl.net> > wrote: > >> On Wed, 8 Jul 2015 06:24:45 -0400, jonetsu(a)teksavvy.com wrote: >> >Anyone got the DPRK national anthem in gsequencer format ? >> >> Regarding [1] it provides midi2xml, so you cold test if [2] really is >> their national anthem. >> >> [1] >> https://plus.google.com/+GsequencerOrg001/posts >> [2] >> http://www.download-midi.com/midi_8979_national-anthem-north-korea.html >> _______________________________________________ >> Linux-audio-user mailing list >> Linux-audio-user(a)lists.linuxaudio.org >> http://lists.linuxaudio.org/listinfo/linux-audio-user >> > >

10 years

Job - Germany - Hardware Technician

by Patrick Shirkey

Hi, I have a long term salary opportunity for someone based in Germany working with audio and multimedia hardware technology. No specific programming skills required, but should have a strong understanding of Linux and a passion for dealing with a range of multimedia hardware technology at various interesting locations. Will need to travel around the country on a regular basis so must have valid driver license and enjoy driving on the autobahn. Own vehicle is also useful. Also should be comfortable using phone and email and prepared to work hard to meet deadlines. Starting in August/September depending on availability. Contact me offlist for more details or just send me your CV. -- Patrick Shirkey Boost Hardware Ltd

10 years

2025

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

2009

2008

2007

2006

2005

2004

2003

2002

Linux-audio-user July 2015