the vmpk virtual screen midi keyboad refuses to start as it does not
find its default midi drivers, exiting after throwing
Default MIDI IN driver "Network" not found
Default MIDI OUT driver "SonivoxEAS" not found
Unable to initialize all MIDI drivers. Terminating.
There seems to be no way to set these via flags or config file.
Trying the more recent vmpk application image from
fails as it sees to require pulse audio(?).
Does anyone have an idead about the above problem or can suggest an
alternative software midi keyboard? Thank you so much! P
In the end I took your lead and installed Linux Mint and then
installed the "Fully Preemptible" real-time kernel with
instructions from here:
Note, if anyone tried this, in the more recent patched kernel
that I configured, the "Fully Preemptible Kernel (Real-Time)" item
in the config was not found in the "Processor type and feature" menu
but in "General setup".
With this I got the Pd test patch running glitch free with jack
configs of: 48kHz, 64 frames/period, 2 periods/buff and a latency
On 1/31/20 11:30 AM, Christoph Kuhr
I always build my OS on top of linux mint. 18.3 at the moment
working with the babyface.
But I also build all the software that I need by myself.
Diese Nachricht wurde von meinem Android Mobiltelefon mit WEB.DE Mail
Am 31.01.20, 11:05 schrieb Iain Mott
Hi Christoph and list, reporting back: It seems the
problems, particularly on the laptop, are related to Ubuntu.
Last night I made a live USB stick of AV Linux. Booting from
this both solves the problem of the USB ports and produces
glitch free audio (thus far). I got ins and outs working
with Pd + jack with frames/period set to 64, sample rate
48hHz, and periods/buffer 3. Latency of 4msec, so I'm happy
with that (Pd gave segmentation faults on startup at lower
frame rates). The Pd test (playing a tone and monitoring mic
input) did much better than it did on Windows
(portaudio/asio) where I still heard occasional glitches
(don't remember the latency value).
Christoph and others using the Scarlett, what Linux
distributions are you using?
>Is is USB Class compliant or does it come with specific
>If it does, maybe you can switch from "special" to
I believe it is class compliant except for configuration
process. How would one "switch from special to compliant"?
I've heard of people having success using Wine to run
Focusrite Control, so I'll try this too.
All the best,
Em 31/01/2020 04:10, Christoph
no, I don't have a gen3.
Is is USB Class compliant or does it come with specific
This worked for my RME babyface pro though.
Hope this helps...
Diese Nachricht wurde von meinem Android Mobiltelefon mit
Am 30.01.20, 11:47 schrieb Iain Mott <mott(a)escuta.org>:
Hi Christoph, I don't doubt for a minute that I'm
doing something silly, but do you mean the monitor and
headphone gain knobs on the front? Yes, they're both
up. When I switch directly to windows, everything is
working: pd (ASIO driver "via portaudio"),
SuperCollider, Ardour, etc., but in Linux, silence....
You have a 3rd gen interface?
Em 30/01/2020 07:26,
Christoph Kuhr escreveu:
did you turn up the hardware volume?
I had this problem. Someone truly evil turned it
down, while I wasn't watching... ;-)
Diese Nachricht wurde von meinem Android
Mobiltelefon mit WEB.DE Mail gesendet.
Am 30.01.20, 10:24 schrieb Iain
Dear Linux audio
I have a Scarlett 18i20 3rd Gen interface which
I'm trying to use on a
recent Samsung laptop with Ubuntu 19.04.
The 3rd gen devices are apparently shipped in
non-functional "MSD" mode,
so I registered and activated the device using
Windows 10 following the
instructions on the Focusrite website. Tested it
there with Ableton Live
Lite (provided via registration of the device) and
also Ardour. It works
fine. To get it to work on Ardour it was necessary
to use the ASIO
driver in the Ardour audio configuration. I had
removed ASIO4ALL before
installing the Focusrite/Scarlett software as
suggested, so perhaps this
driver came with Focusrite install.
Now with the device apparently configured and the
routing done in
Windows using the Focusrite Control software (i
thinks that's the name,
I had selected output channels 1 and 2 to connect
monitors/headphone jack), I returned to Linux. The
Scarlett device is
detected by lsusb, qjackctl and pavucontrol. Jack
runs with no errors
when the Scarlett is selected as the i/o device
and all the correct
channels appear in the Connect window. No sound
however is heard through
the phone jack, nor if i plug the phones directly
in to the output jacks
at the back. I tested using VLC configured for
Jack output and also with
With jack turned off and with VLC audio out set to
pulsaudio, I set the
Scarlett 18i20 as the preferred device in
pavucontrol. With VLC playing
the output VU meter for the Scarlett is active in
pavucontrol but there
is still no sound coming out of the device itself.
Has anyone managed to get a 3rd generation
Scarlett to work on Linux?
Can anyone suggest please what I can do?
PS. i did see an unresolved thread on this list
last year about a 3rd
gen Scarlett. I'll send a message to the author to
see if the problem
Linux-audio-user mailing list
After many (too many ?) years using Fedora 23 I decided/admitted a
system upgrade was long overdue. I chose Ubuntu 18.04 simply because I
recently installed it on a Toshiba Satellite laptop - a fun story itself
- and am satisfied with the results, especially after installing some
Ubuntu Studio components. Anyway, that machine is now a smooth-running
gun, so I figured, "Why not put Ubuntu on the desktop iron ?". And so
begins the tale...
My DVD drive is broken, so I planned to use the same bootable USB stick
I used for the laptop. That was the first problem. I tested the stick on
the desktop and discovered that my mobo wouldn't boot from it,
regardless of BIOS settings for boot selection and order. At last I
thought that the stick wasn't recognized because of the file system
type, so I created another bootable stick. This one was recognized, but
only long enough to inform me that there was no operating system on it.
Okay, a little more googling helped me out, I tried a different stick
preparation software because unetbootin has problems with some mobos.
This time the stick booted properly and at last I had an Ubuntu display.
From that point the installation was trouble-free - including the
addition of the Ubuntu Studio stuff - until reaching the part where I
installed the nVidia drivers. I had added a new graphics card, so I had
to jump through a few more hoops before I finally had a working video
Software installation was a breeze and I soon had a complete development
environment. Again, no significant problems building and installing my
Email proved to be the final bug-bear. I was able to configure for
incoming mail without trouble but my outgoing server simply was not
functioning. I called my ISP, had a long chat with a helpful fellow, and
still had no outgoing mail capability. At long last I found an on-line
report regarding the same problem and discovered that a single setting
should be changed. I made the change and finally have outgoing mail again.
Two days configuring this machine. Why I still don't usually recommend
Linux to normal users.
On running Jack into a USB soundcard, there have been a few occasions where the
USB lead was snagged and pulled out. On each occasion the computer locked up,
and could only be cleared by a hard reset. Is there a way of mitigating this?
This doesn't seem to happen if the card is being accessed by Alsa.
Running devuan ASCII or Beowulf on intel machine.
Also Rasbian on Pi 4
Will J Godfrey
Say you have a poem and I have a tune.
Exchange them and we can both have a poem, a tune, and a song.
Previously, I uses SoX (and a bit of scripting) to mix a set of several
tracks into a single mix. This involved quite a bit of manual work, as I had
to figure out the tempi and start/end points by listeing.
I am wondering, is there perhaps a better tool which could be used
to get faster results? In particular, I'd love to be able
to save metdata for tracks, like *exact* BPM and time indices
of certain interesting bars per track such that I could reuse them.
Any tools I haven't noticed that could be used to do this on the
On 2/17/20 5:59 AM, Louigi Verona wrote:
> I would love to follow everyone from the Linux Audio mailinglist
> releases stuff on SoundCloud. Please, respond with your SoundCloud
> links! ^_^
Hi all. Long time no talk. Sorry for the cross-post.
When I last tried dssi-vst in November, I got it running
but with a continuous stream of errors and xruns.
That was apparently caused by kernel futex problems.
dssi-vst was assumed dead.
But I just tried again and it's working 100% no errors or xruns.
Seems maybe these kernel futex patches have been applied?
Anyone in a position to try and verify?
May have to edit a wee path or two in the Makefile.
I can't believe it, it's working for over an hour now...
I've written a python script to do crossfades loops in samples. First version was using commandline tools, but updates of the underlying tools broke my script, so I re-did it with pydub, only to find that pydub seems to be doing linear fade when crossfading, resulting in a nasty drop in volume in the middle of the fade.
So does anyone know of a commandline tool or even better python tool, that can cross fade with equal power or at least lets me do the fade ins/outs with the correct curve, then I can mix them myself afterwards.
Thanks in advance for any pointers.
NB: I'm not sure my mails are comming through, since I don't see them myself. So even if you don't have a solution to my problem, a friendly "mail went through" would be highly appreciated.
http://latestyoutube.a773.dk | http://a773.dk
spectmorph-0.5.1 has been released.
If you haven't watched our video tutorial for the instrument editor
added in 0.5.0, you can do so here: https://youtu.be/JlugWYPDp84
This release introduces statically linked generic 64 bit linux plugin
binaries, so even if the packages don't match your linux version, you
should be able to install these without compiling. This is a new
feature, let me know if it doesn't work for you.
Overview of Changes in spectmorph-0.5.1:
* Add new LFO modes (saw, square, random)
* Support generic 64-bit linux binaries
- new linux file selector (no longer needs Qt)
- ship font for static build
* Fix crashes caused by fftw planner being used from multiple threads
* Ported all python2 code to python3
* Support midi all notes off
* Implement LV2 StateChanged
* French translation for smjack desktop file (Olivier Humbert)
* Thread race fix (JP Cimalando)
* 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, Windows and macOS 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/macOS)
- LV2 Plugin, for any sequencer that supports it.
- JACK Client.
There are many audio demos on the website, which demonstrate morphing
Stefan Westerfeld, Hamburg/Germany, http://space.twc.de/~stefan