Friends
I am working on a recorder that priorities simple keyboard control, it has very little gui. This is what I need, but one important use is for people who cannot look at a gui (me, I cannot be bothered, I find GUI displays usually very distracting, and at best inconvenient)
I do want to have peak indicator, a warning if the level is too high and data loss is occurring.
This is a new journey for me, and some concepts might be a bit fuzzy in my head, forgive me.
How can I have a warnings in my software that will play nice with accessibility software?
Should I output lines on stdout that screen readers can process and then do whatever they are configured for?
I want to get this right from the very start. I though this might be a good place to ask
I am sorry if this is a bit off topic for Linux audio
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Hi!
Found another strange behavior with pipewire:
During my latest issue playing some audio to a certain channel, I took
pw-play to do the job.
In parallel, audacity should play some background music for the audience.
The two apps cause an interaction I just didn't expect:
Altering the output volume of audacity also altered the output of pw-play!
My steps (to reproduce):
* Configure a command-cue in "linux-show-player"(LiSP) with pw-play as
the main actor (as shown in my first "pipewire, wtf?" post.
* Open "audacious", play a track, set the volume to, let's say, 30%.
* Open "pavucontrol", go to "playback" rider and watch!
If I run the command-cue in LiSP, pavucontrol shows, that the output of
pw-play is also reduced to 30%. Raise audacious' volume to 50% and hit
the command-cue, again: pw-play's output is also raised to 50%.
I don't think this should happen…
Is this a bug or a feature?
Instead of using the command-cue in LiSP, you can also use that command,
directly.
I'm glad, the audio-cues of LiSP are not affected… I also haven't seen
more applications that interact in that way, but audacious and pw-play
will not be the only two where this behavior is shown…
Greets!
Mitsch
Could someone explain what's going on here and how to fix that?
Since pipewire is here, the jack output plugin of linux-show-player
(LiSP) doesn't work anymore. Try to help myself getting an output on
the 3./4. channel of my Focusrite Scarlet 2i4 and created a 4-channel
audio file with audacity, empty at channel 1,2, signal at 3,4.
What happens?
In "Direct Scarlet 2i4 USB"-mode: LiSP creates a 4-channel-output
(output_[FL,FR,FC,LFE]), where the signal comes out at 1,2 (*_[FL,FR])
In "Pro Audio"-mode: LiSP only creates 2 outputs. Signal's also routed
to those.
Shouldn't multichannel stay multi with pipewire?
I don't know, why everything's just down-/upmixed to stereo…
(In case a mono track is streamed, it's also thrown at FL/FR - which in
that case is fortunaltely what I want…)
############
As a completion, here's my workaround:
Using LiSP's "command-cue" I can use a combination of pw-play and pw-
link to start the stream and redirect it to the desired output. "sleep"
adds a little delay so the audio-stream is established and can be
modified.
pw-play 4-ch-audio.wav &sleep .1&& pw-link pw-play:output_FL
alsa_output.usb-Focusrite_Scarlett_2i4_USB-00.pro-output-
0:playback_AUX3 && pw-link pw-play:output_FR alsa_output.usb-
Focusrite_Scarlett_2i4_USB-00.pro-output-0:playback_AUX4 && pw-link -d
pw-play:output_FR alsa_output.usb-Focusrite_Scarlett_2i4_USB-00.pro-
output-0:playback_AUX1 && pw-link -d pw-play:output_FL alsa_output.usb-
Focusrite_Scarlett_2i4_USB-00.pro-output-0:playback_AUX2
Would be easier if pw-play could handle output-advises directly…
Greets!
Mitsch
Hi, there!
Everything's just easy with pipewire, isn't it?
Well, since pipewire's here I have some problems with it using my
beloved linux-show-player (LiSP) in combination with jack-output.
So, I'd like to use a workaround using console-commands…
I have a build-in audio device and a bluetooth connection, pw-top lists
these devices:
Dummy-Driver
Freewheel-Driver
[…]
alsa-output.pci-0000_00_1b.0.analog-stereo
[…]
bluez_output.[bluetooth-adress].1
[…]
How do I send a stereo or mono audio stream to the bluez-output with a
console command? Can I use aplay? (Because aplay -L doesn't list the
bluetooth speaker…)
Any ideas?
Thank you!
Mitsch
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This new Loopino release focuses on expressiveness, classic
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experience. With newly added Pitch Wheel support, Loopino now responds
more like a real instrument, enabling expressive bends, subtle detuning,
and dynamic performance gestures via MIDI.
Sound design has been expanded with the addition of an Oberheim-style
filter, complementing the existing Moog-style ladder filter. Together,
they offer two distinct analogue flavours for sculpting everything from
smooth pads to aggressive textures. Velocity-dependent dynamic controls
allow envelopes, filters, and modulation depth to react naturally to
playing intensity, bringing Loopino even closer to a
performance-oriented sampler-synth hybrid.
To enrich spatial depth and movement, this release introduces an
integrated Chorus and Reverb, making it possible to create wide, lush,
and immersive sounds directly inside Loopino—no external effects required.
For standalone users, native ALSA audio and MIDI support has been added,
improving stability, latency, and system integration on Linux.
Alongside these additions, Loopino continues to offer its core feature
set: drag-and-drop sample loading, on-the-fly recording, pitch tracking,
a powerful Micro Loop Generator with selectable loop count and duration,
non-destructive wave shaping (square & saw), LP/HP ladder filtering,
phase modulators (sine, triangle, noise, Juno-style), vibrato, tremolo,
root frequency control, preset handling, WAV export in the selected key,
and up to 48 voices of polyphony.
**Highlights of this Release**
- MIDI Pitch Wheel support for expressive performance
- New Oberheim-style filter
- Velocity-based dynamic modulation controls
- Integrated Chorus and Reverb effects
- ALSA audio & MIDI support for the standalone version
- Continued improvements to stability, workflow, and sound quality
Loopino keeps evolving into a flexible, expressive instrument that
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audio into playable instruments.
## Availability
- Linux: Standalone application, CLAP plugin, VST2 plugin
- Windows: CLAP plugin, VST2 plugin
Project Page:
https://github.com/brummer10/Loopino
Release Page:
https://github.com/brummer10/Loopino/releases/tag/v0.1.0
Dear list,
please excuse the following for being largely offtopic to linux audio. I
can't seem to find any useful information via startpage.com nor can I
think of a list I am subscribed to to ask the following:
I sometimes have the need to show pdf slides in presentations and like
using pdfpc[1], a "presenter console with multi-monitor support for PDF
files" using an extended X display. I do as well have the need to show
the (single) desktop I am working on. The only way I can achieve this is
to switch back and forth between the two setups using xrandr.
I am using a display manager (fluxbox) with multiple virtual desktops.
I am wondering if there is a smarter less interrupting way.
What if I had one extended display, whose left side is on my laptop's
screen and right side on the video projector, and had something like a
vnc-client on the right side, mirroring what is going on on the left
side of the screen. I could then show what I am working on on the left
screen but also have the pdf presenter console span the left and right
side of this extended display together.
I hope my description and question do make (some) sense.
If anyone has an idea I'd be happy to know!
thanks, and exuse the OT post,
Peter
[1] https://pdfpc.github.io/
