Linux-audio-user

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20662 discussions

by Daniel Swärd

Hi. Something me and my friend (who dropped by to cheer me up) made this afternoon using Bitwig on Ubuntu. It's David on guitar: https://soundcloud.com/excds/regularberlinmonday Comments? Cheers. /Daniel

8 years, 11 months

Re: [LAU] [SOLVED] Crackles in audio, drifting intermittent noise etc.

by David Jones

On Nov 30, 2016 15:01, Len Ovens <len(a)ovenwerks.net> wrote: > > On Wed, 30 Nov 2016, David Jones wrote: > > > On Nov 30, 2016 10:17, Len Ovens <len(a)ovenwerks.net> wrote: > >> > >> > termtech <termtech(a)rogers.com> wrote: > >> > > >> >> Fascinating! ANY one or two of the cores are OK, > >> >> yet ANY three or all four of them causes the noises. > >> > > >> > Don't know what CPU you have, but sounds like SMT (hyperthreading isn't > >> > working well for you? > >> > >> His 4 core i5 doesn't have ht... (according to the intel web site) > > > > My i7 doesn't have the problem, either. Makes me wonder if OP's i5 chip > > or one of the supporting chips on the motherboard has a defect? > > Or an engineering mistake, low latency and PCI performance is not exactly > top priority in todays computer world. > > I have an i5 (4 core no ht) and a D66, which is the same ice1712 to the > PCI bus as the OP. No problems. I have an azus MB which I chose for > maximum number of PCI slots (3) so I had as much choice of slot as I could > get. I chose minimum on board bells and whistles because those are just > more to get in the way of my audio. Intel video (on chip) and even ps2 > mouse and keyboard. (I have an old mechanical KB that has a switch for "at > or xt" to show how old it is). While I don't use a USB Audio Interface, I > don't like USB mice if I can avoid them... I have found USB interrupts > troublesome in the past. The only USB device I have is a scanner which is > turned off when not used, plus the odd USB mem stick and a second keyboard > I use with midikb as a controller sometimes for testing. Audio is not plug > and play really on a PC (win or linux) if you want low latency it needs > exrta work. Linux at least gives one the tools to do that. Agreed. Pro audio work (Win or Linux - don't now about MacOS) is such a tiny fraction of total PC use, so I don't think PC makers consider it at all. Even a friend who pursued a music career using Windows systems set up and supplied by experts at Sweetwater never got reliable RT audio performance. (He's now considering a Mac and Pro Tools.) David W. Jones gnome(a)hawaii.rr.com authenticity, honesty, community http://dancingtreefrog.com

8 years, 11 months

Re: [LAU] [SOLVED] Crackles in audio, drifting intermittent noise etc.

by David Jones

On Nov 30, 2016 10:17, Len Ovens <len(a)ovenwerks.net> wrote: > > On Wed, 30 Nov 2016, Joakim Hernberg wrote: > > > On Tue, 29 Nov 2016 20:02:25 -0500 > > termtech <termtech(a)rogers.com> wrote: > > > >> Fascinating! ANY one or two of the cores are OK, > >> yet ANY three or all four of them causes the noises. > > > > Don't know what CPU you have, but sounds like SMT (hyperthreading isn't > > working well for you? > > His 4 core i5 doesn't have ht... (according to the intel web site) My i7 doesn't have the problem, either. Makes me wonder if OP's i5 chip or one of the supporting chips on the motherboard has a defect? David W. Jones gnome(a)hawaii.rr.com authenticity, honesty, community http://dancingtreefrog.com

8 years, 11 months

Re: [LAU] RME HDSP 9652 priority issue

by David Jones

On Nov 30, 2016 10:17, Ralf Mardorf <ralf.mardorf(a)alice-dsl.net> wrote: > > Hi, > > since I needed to delete around 10,500 spam mails, I also needed to > delete a few mails I received from this list, so the thread is > semi-broken. This mail isn't in reply to the OP, but in reply to Len's > mail. I read it in the archive. > > Len wrote: > "If you think it is a problem with systemd, try > sudo /etc/init.d/rtirq restart" > > If this should be required, then something is fishy with > systemd-sysv-generator. > > Run > > systemctl status rtirq > > to check if systemd-sysv-generator has generated a unit and ask your > distro to completely migrate to systemd or to completely switch back to > init scripts. Hybrid distros are a PITA. It's idiotic to mix systemd > with init scripts. > > Regards, > Ralf I agree. I run Debian Testing. I don't consider systemd ready for prime time. It doesn't gracefully handle my daily situation: 1) Boot up laptop at home with access to my file shares there. 2) Take laptop to office, where I have no network connection at all - so no access to file shares. Systemd works at home (well, when it doesn't try to mount the file shares BEFORE it has brought up the network connection). At the office, it dumps me to an emergency boot systemctl wanting me to fix the errors: the missing file shares. Init on Debian Testing doesn't have either of those problems. David W. Jones gnome(a)hawaii.rr.com authenticity, honesty, community http://dancingtreefrog.com

8 years, 11 months

slim phatty

by tom haddington

Hello, All! i'm wondering: Does anyone on this list own one of Moog's Slim Phattys (or any of the other Phattys)? If so, have you been able to retune it from your computer? How about saving and loading presets? Thanks! il lupo

8 years, 11 months

[SOLVED] Crackles in audio, drifting intermittent noise etc.

by termtech

A follow-up to a thread in August. Recall: My Delta1010-LT card was not OK in my new PC so I tried it in another PC at the shop and it tested OK for 15 minutes, so I deemed that PC to be OK and my dealer would give me /that/ PC instead. Imagine my surprise (anger) when I finally brought the other PC home and set it up, and the sound was fine... For 15 minutes! Then suddenly the same noises started again! This time however, I noticed something: When using the card in an 'effect' situation, where audio input is passed through to an audio output, either directly or with some effect, horrible noise would appear after 15 minutes and then... slowly drift into working again for 15 minutes, and then slowly drift into noise again for 15 minutes, then working again for 15 minutes and so on. This was a HUGE clue. This slow drifting in and out of noise is familiar. It is instantly recognizable to me (as should you) as a synchronization problem, not a PCI voltage or bus problem. Anyone who has worked with syncing multiple sound cards together, or with ADC + DAC mutual clock sync problems, or re-sampling up/down converters should recognize this slow drifting in and out of noise. At last there was hope that this could be diagnosed and possibly solved. So... on this replacement PC there is a setting in the BIOS for the number of CPU cores to activate. The cheaper original new PC had NO such setting. * That setting has solved it! * I had to set TWO CPU cores (or ONE) instead of FOUR CPU cores. Working solidly for 3 days now! *NO* other settings helped. Not even Speed Step et al. They're all turned on now! This is my first multi-core CPU. I'm late to the party. Ironically I had told my dealer this was one of the reasons to get a new PC, so that I could test our app to see how it works with such newer CPUs. I had even researched these CPUs and had read that it is possible that the CPU Clock signals can be independent for each core, thus causing some synchronization problems. At this point I'm not sure if this a clock signal sync problem or a timer/counter problem. I had also read that 'local' timers/counters can be a problem with multi-core CPUs - that time is not quite the same in each core. IIRC Someone told me that a quad core is two chips each with two cores ?? That might explain why sound works fine with TWO cores but not FOUR ?? My interrupt affinity list showed only core 3 was getting them, and forcing them to core 1 didn't help. Can anyone shed some more light on these multi-core problems? Comments welcome, please! Thanks. Tim. On Thursday, August 25, 2016 3:20:40 PM EDT jonetsu(a)teksavvy.com wrote: > > Hello, > > > > Suddenly the audio started crackling. I was listening to a youtube > > tutorial (firefox) and it started. Bitwig and Renoise were running but > > not playing anything. I looked at the log files (syslog, kern) nothing > > relevant. Card is 10101LT. > > > > jackd runs at about 10.3ms latency (last time I checked using > > jack_iodelay), so it run as: > > > > /usr/bin/jackd --sync -T -P95 -ndefault -dalsa -dhw:M1010LT -r44100 > > -p128 -n2 > > > > scaling_gouvernor all set to performance. Interrupt prio looks OK: > > PID CLS RTPRIO NI PRI %CPU STAT COMMAND > > 436 FF 90 - 130 1.6 S irq/18-snd_ice1 > > > > 47 FF 50 - 90 0.0 S irq/9-acpi > > > > limits audio.conf is: > > > > @audio - rtprio 95 > > @audio - memlock unlimited > > > > Interrupts servicing for all 4 CPUs (i5) : > > 0: IR-IO-APIC-edge i8042 > > 4: IR-IO-APIC-edge > > 8: IR-IO-APIC-edge rtc0 > > 9: IR-IO-APIC-fasteoi acpi > > > > 12: IR-IO-APIC-edge i8042 > > 18: IR-IO-APIC-fasteoi snd_ice1712 > > > > jackd and pulse processes: > > /usr/bin/pulseaudio --start --log-target=syslog > > > > [pulseaudio] <defunct> > > > > /usr/bin/jackd -T -ndefault --sync -T -P95 -ndefault -dalsa > > -dhw:M1010LT -r44100 -p128 -n2 > > > > The pa zombie was there way before the crackling started. Not sure if > > this is related. > > > > The pulseaudio jackd sink is active and can be seen in qjackctl. > > > > So it seems OK. But the audio is full of crackles. In firefox, as > > well as Bitwig and Renoise when now something is played. Of course, > > when the machine was started some audio was played in both Bitwig and > > Renoise and it was fine. Then I watched a youtube tutorial and bam, > > after maybe 15 minutes, all audio output is full of crackling. > > > > Since the log files shows nothing. How is troubleshooting information > > gathered ? There should be some SW system component that can be > > probed, somwthing that could be observed. - or is it that the 1010LT > > is going awry ? Can this happen at all ? > > > > Thanks for suggestions and comments ! > > > > Cheers. > Hi, this is very, very ironic for me. > Is this a new or replacement PC? > > I hope the following helps provide at least one answer for others having > > these problems: > My new i5 Acer M3910 PC is doing the same thing with my 1010LT. > Right from day one. Digital noise, crackles, and pops, on the analog output. > > This is in BOTH Linux and Windows 7. The same noises in each. > > To be sure, I reinstalled the card on the older PC from which it came, > > and it is fine. I also installed a SBLive! PCI card on the new PC and > it is fine. Seems this 1010LT doesn't like this new PC. > > I have noticed many people complaining about such noises, > > especially the clicks and pops. But as you know this can be muddy > territory, with several different causes that are hard to pin down. > > So, being heavily involved with these ice1712 cards > > (I helped with mudita24 mixer), I have some test results > > that should interest owners of this card: > Go to this site: > http://onlinetonegenerator.com > > and input a high frequency of say 15000Hz, so that you don't > hear the tone so much as any noise that may accompany it. > > Or, if so desired, use Jack and a tone generator plugin. > > On this new PC I get really horrible digital noise, clicks and pops. > The digital noise, oddly, is worse with higher frequency test tones. > From listening carefully to the noise, it seems something to do > > with the PCI bus timing or voltage, or poor digital shielding such that > noise is getting into the D/A converters before conversion to analog. > > This 1010LT card is revision 'C', the last and latest revision. > > I tried everything. Turned off SpeedStep, adjusted Jack buffer size etc. > > This PC's BIOS is not very friendly, it is a so-called 'locked BIOS' > > where you don't have much in the way of critical timing parameters. > > ---- > > So, today I brought the card to my dealer and we tried it on > > another i5 PC, having a much better Asus MB. > > Result: Perfect behaviour. Even at the lowest power saving settings, > > on that test-tone website the card only made a couple of pops but > no digital noise. I would expect a couple of pops here and there > at these settings, so I concluded the card is fine there. > > Conclusion: My dealer is replacing this Acer MB with the better one. > > Believe me if there was something I could do to make it work > > I would do it and report back. I was contemplating replacing the > electrolytic capacitors on the card just in case. You'd be surprised just > how weak caps can be, allowing digital ripple on supply lines etc. > > It's possible that may help. > But given that the card works OK elsewhere, and I don't want to waste > > any more time on this, I am just going for the replacement PC instead. > > Tim.

8 years, 11 months

Missing master-volume on onboard soundcard?

by Michael Jarosch

Hi, there! Since approximately one year I have a new motherboard for my living- room-PC, called Biostar HiFi A88S3+. It's sound-device is a HDA-Intel with ALC892 Codec. I also use an "amplifier card" that is powered by the PCI-slot. With all of my recent equipment I've ever used it was possible to reduce noise that is produced by the digital devices in the PC: Lowering the master level did the trick. Just with the Biostar "HiFi" this doesn't seem to be possible. It always sounds like the master is open and all the noise comes quite audible through the speakers to my living room. Don't get me wrong: The master works. But it seems that lowering the volume is done by software. I wonder if this is a brand new method for manufacturers to save money or if probably the ALSA-driver is doing something wrong here? $ cat /proc/asound/cards 0 [HDMI ]: HDA-Intel - HDA ATI HDMI HDA ATI HDMI at 0xfeb64000 irq 45 1 [Generic ]: HDA-Intel - HD-Audio Generic HD-Audio Generic at 0xfeb60000 irq 16 Greets! Mitsch

8 years, 11 months

PreSonus 1818VSL vs Focusrite 18i20

by Ralf Mardorf

Hi, do you have experiences with PreSonus AudioBox 1818VSL and/or Focusrite Scarlett 18i20? Until now I'm using a RME HDSPe AIO and an ADA8000, but for several reasons I need an USB device. Regards, Ralf

8 years, 11 months

Re: [LAU] Linux-audio-user Digest, Vol 117, Issue 33

by francois bluewin

Adding to the subject : I found on the web and in the source code of HDSPMixer 2 interesting things, namely: - despite the effective 3x16 channels, it seems the internal channels might be 3x64, or at least 64 inputs, 64 outputs and ??? playback channels - the source code shows a "playbacks_offset = 64" variable I don't really see how to use these news as the code below doesn't work. (reminder : the goal is to connect playback channels 1&2 to outputs 7&8) function set_gain () { amixer -c hw:0 cset numid=1 $1,$2,$3 > /dev/null 2>&1 } function reset_matrix () { for out in $(seq 0 63); do for inp in $(seq 0 63); do set_gain $inp $out 0 done done } reset_matrix #following lines tried 2 by 2 : set_gain 0 6 65535 #doesn't work (I tried 0 and 1 inputs as there is sound there in graphical HDSPMixer vu-meter) set_gain 1 7 65535 #doesn't work set_gain 64 6 65535 #doesn't work (64 and 65 as 1st playback channels) set_gain 65 7 65535 #doesn't work set_gain 0 128 65535 #doesn't work set_gain 1 129 65535 #doesn't work set_gain 64 128 65535 #doesn't work set_gain 65 129 65535 #doesn't work exit 0 Any idea ? Le 28/11/2016 à 13:00, linux-audio-user-request(a)lists.linuxaudio.org a écrit : > Re: Channel routing with RME HDSPe AES without HDSPMixer

8 years, 11 months

Re: [LAU] Channel routing with RME HDSPe AES without HDSPMixer

by francois bluewin

Hi, Tanks for the advice and example. Unable to find the channels numbering, I tried with the assumption that inputs are 0-15, playback 16-31 and ouptuts 0-15, but it doesn't work (there are seemingly 16 channels of each type). Checking with the graphical HDSPmixer doesn't help as it loads it's own setup when starting, so it does probably erase my "manual" setup... Does anyone know the HDSPe AES channels numbering ? Thks Francois Le 27/11/2016 à 13:00, linux-audio-user-request(a)lists.linuxaudio.org a écrit : > Re: Channel routing with RME HDSPe AES without HDSPMixer

8 years, 11 months

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Linux-audio-user