Hi list,
I have been search the archives and the web a bit and it seems there is
no easy way to route html5 audio playback from firefox through jack on
Debian testing.
Is this still the case or has there been recent development that might
enable it? What would have to be done to make it work? This
functionality is the last piece in my puzzle to finally get rid of
flash.
thanks for pointers,
P
Hi there!
ShowQ is a unique cue-player for Linux-Audio-Users. I use it as a core
application for my theater activities.
Even in the linux-community it's not a very well known application,
although there's no other linux-program (I know) if you need a
one-shot-audio-player with features like f.e. programmable fade-in,
fade-out, no matter if you want it time-based or triggered by space (or
another key).
It can do a lot more - ShowQ has MIDI-support. Although I never tested
this feature, it should be possible to control any application with
MIDI-support. QLC(+) f.e. - or maybe some video-players do support MIDI
- I don't know...
Yeah, of course, ShowQ is not a drop in replacement for QLAB, but
speaking about audio it fits quiet perfectly in my setup.
ShowQ is in the Debian (and Ubuntu?) repositories, it's written in C++
and of course released under the terms of the GPL. Although this app is
quiet useful for technicians like me, the development stopped years ago.
I am not a coder, but I do my best to keep this project alive. On the
Debian bug-tracker I write bug-reports for ShowQ, hoping that on one
hand it's useful for other users to work around problems, on the other
hand that someone fixes them.
Last time I reported a bug Jaromír Mikeš the Debian-maintainer of ShowQ
wrote that he is not able to fix the bugs and he would like to kick
ShowQ. Of course, he also would like to package an alternative if there
would be some he could package.
I don't know any - so my linux-based theater setup is about to be killed
one day when ShowQ wouldn't compile on my debian machine, anymore.
So, what do I want from you?
Test ShowQ! Maybe it's the app you've been missing for a long time!
And if you're a coder with C++-skills, check out my bugreports on
https://bugs.debian.org/cgi-bin/pkgreport.cgi?repeatmerged=no&src=showq
- maybe you've got the clue...
OR: Got an alternative to ShowQ? You're welcome!
Greets!
Mitsch
Hi,
Just wanted to share something I've been fiddling with this week.
AMEN $ Mother Function
https://youtu.be/qTQoE5UHgP8
One sample, one function. Live coded single function demolition of the most
ubiquitous sample in modern music. Takes a little while to get going ..
working on that .. amazing what sounds you can get from one sample and a
little maths! :-)
This was created in Praxis LIVE, which was recently presented at the
International Conference on Live Coding. I had this idea while I was
there. It utilises a few useful things for live-coding per-sample
functions that got added in v3.
Best wishes,
Neil
--
Neil C Smith
Artist & Technologist
www.neilcsmith.net
Praxis LIVE - hybrid visual IDE for creative coding - www.praxislive.org
The Guitarix developers proudly present
Guitarix release 0.35.2
Guitarix is a tube amplifier simulation for
jack (Linux), with an additional mono and a stereo effect rack.
Guitarix includes a large list of plugins[*] and support LADSPA / LV2
plugs as well.
The guitarix engine is designed for LIVE usage, and feature ultra fast,
glitch and click free preset switching and is full Midi and/or remote
controllable (the Web UI is not included in the distributed tar ball).
This release mainly fix a build issue in Debian #839354 and ARCH
Beside that, the changes are:
* add stereo cabinet plugin
* fix bypass insert jack port with midi CC
* add menu option to set a midi controller for engine bypass
* add scroll wheel support to status images
* switch to use glib-compile-resources instead gdk-pixbuf-csource to
include images into libgxw.
* Fix Preset switching issue in lv2 amps and cabinet
* disable midi control for un-loaded plugs
* add check if LV2 ports are valid
* fix bug #34
Note that a couple of new additional guitar related plugs in LV2 format
been available on github now. They all work very well in guitarix.
Check them out here:
https://github.com/brummer10?tab=repositories
Please refer to our project page for more information:
http://guitarix.org
Download Site:
http://sourceforge.net/projects/guitarix/
Forum:
http://guitarix.sourceforge.net/forum/
Please consider visiting our forum or leaving a message on
guitarix-developer(a)lists.sourceforge.net
<mailto:guitarix-developer@lists.sourceforge.net>
regards
hermann
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.
On Mon, October 31, 2016 3:44 am, Yassin Philip wrote:
> http://lexiconpro.com/en/products/alpha
> Does anybody here know about this interface?
Very competent but basic interface. Has a hardware monitor control which
is controlled by a front panel knob, also has a hardware volume knob for
the headphone out (which I also like, software crash cannot make unwanted
changes to headphone volume).
The microphone input (only one) does not have phantom power, and is very
basic. Good if you only need 30dB or 40dB of gain, gets noisy at the
maximum 50dB gain setting. With no phantom power you won't be using
condenser microphones, with limited gain range you won't be using ribbon
microphones, but fine for basic close range dynamic microphones.
I did not try the instrument input, so cannot comment on that.
I have a Lambda, bought an Alpha for someone else. The Lambda is more
flexible, it has two microphone inputs with phantom power, but otherwise
very similar. I would recommend the Lambda just because the phantom power
makes it useful with condenser microphones, but it is double the price.
If the extra 50 euros it not significant, I would get the Lambda just for
that flexibility. If the money is just not available, or your friend
knows that a condenser microphone is not likely anytime in the near
future, then as far as I can tell the Alpha is very similar but with only
half the features, and proportionally at half the price.
--
Chris Caudle
Hi
I've just pushed a analogue simulation of the UniVox Stage 720 Amp, a
transistor based Solid State Amplifier to github. In this simulation a
controllable clipping and a reverb stage is included. Simulated is the
line out jack of the amp, so properly you would add a cabinet simulation
to the chain. Usually this amp comes with a 2x12 cabinet.
https://github.com/brummer10/GxUVox720k.lv2
(*) UniVox is trademark or trade name
of other manufacturer and was used merely to identify the product
whose sound was reviewed in the creation of this product.
regards
hermann
