Dear All,
I am developing a software synthesiser.
My question is about how much headroom I need to leave.
My understanding is:
1. The audio range is from -1.0 to 1.0 (yes/no?).
2. Anything above 1.0 or below -1.0 will be clipped.
3. If the audio interface is 16 bit, then -1.0 corresponds to -32768 and
1.0 corresponds to 32767.
4. If I play a note on a synthesiser and it generate sine wave from -1.0
to 1.0 then this is no good. I need to divide it by some number to leave
a headroom.
5. The question is, how much headroom I need?
Any help would be appreciated.
With kind regards,
Robert
Hello, all, newbie here, both to this forum and to music. I'm a first
year music theory student at my local community college.
I'm searching for a definitive answer to the question, How to play
sounds from a MIDI controller to the other participants in a Zoom
video-conference? I've successfully hooked up my Korg microKEY
controller to my Ubuntu 18.04.5 computer, using qjackctl 0.4.5, qsynth
0.5.0 and vmpk 0.4.0. I connect the microKEY2 to the qsynth and the
VMPK. The patchbay is set up with these connections:
Output Input
PulseAudio JACK Sink and qsynth connect to system
a2j 2 connected to a2j 2
Midi Through and microKEY2 connected to a2midid
I can hear the synthesized piano in my headphones and see the VMPK keys
activate. So far, so good.
I'm using Zoom 5.4.9. I tried to follow the instructions at
https://www.reddit.com/r/linuxaudio/comments/gckoia/midi_to_zoom_skype_etc/.
I used paprefs to add simultaneous output on all sound cards. In this
configuration, when I start Zoom and go to Settings and Audio, I cannot
hear the Test Speaker sound, but can still hear my piano. When I connect
to a meeting, the other participant can't hear me or the piano, and I
can't hear them. I don't know what's meant by "open pavucontrol and
under playback make qsynth output to the null sink. Under recording make
the videochat application use the monitor of the null sink." These seem
to be instruction for JACK, not pavucontrol.
I've seen references to Carla, but it doesn't seem to be in my Ubuntu
repository, and doesn't seem to be created for Ubuntu 18.04.
Can anyone give me an insight to what I'm doing wrong and how to correct
it? My normal troubleshooting technique of just try every possible
combination until something works fails at this task; there's just too
many moving parts.
Thanks so much for your advice and guidance. Let me know if there's a
more appropriate place to ask this question.
-Kevin
Hello,
I use jack2, but still have the jackrouter plugin in my OS X plugin folder. I am trying to understand if this is suppled by jack2, or is a hangover from jackosx. Either way it works.
Thanks
Hi there,
With 0.92 on OS X, I used to be able to set the number of virtual channels in JackPilot. Now I am using QJackCtl and I cannot see a way to add virtual channels. If I increase the number of I/Os in ‘advanced’ to beyond the 2i/2o of my interface, the jack server fails to start. For a recording workflow I use it would be very handy to have the JackRouter device present more I/Os than 2.
Am I missing something?
Thanks
Hello,
from time to time i want to use qjackctl and jack under Windows 10.
So i installed latest version of jack bundle for windows (1.9.17) and
got qjackctl version: 0.9.0.
The problem i have is that the option "Execute script.." does not really
start my scripts. I've tried .bat scripts and powershell scripts, both
are running fine from commandline, but they does not work as expected
from within qjackctl.
On another win10 pc with the old version 0.3.0 the same scripts work
like a charm.
Does anybody have any clue about the right usage?
Thank you very much.
Nicolai
--
mailto: Nicolai.Beuermann(a)gmx.de
online: https://www.nico-beuermann.de
There will be a JackTrip meeting on Mon March 1 at 2:30 pm PST. We'll start by presenting the jitter buffer, a new JackTrip feature. Around 3:30, we'll invite people to present any issues they've had running JACK and ask engineers who are present for advice. If you'd like to volunteer to work on JACK or present any questions or issues, join us here:
https://meet.jit.si/jacktrip.
An engineer in the JackTrip community has developed a beta uninstaller for JACK on OS X. Feel free to message me if you'd like to use or test it.
Bonnie
There will be a Q & A session with Rui Nuno Capela on Mon Feb 15, 2:30 pm PST. The focus will be on how to make QJackCtl more user-friendly.
Message me privately for the meeting link.
Bonnie
On Mon Feb 8, 2:30 pm PST, Stéphane Letz will lead a Q & A session on JACK in the JackTrip community. There are developers in our community who are currently looking into tasks such as uninstalling JACK and bringing back Jack Router. Those who are interested in volunteering in documentation, support or coding, as well as those who are leading parallel efforts to revive Jack Router are especially encouraged to attend.
Message me privately for the Zoom link.
Bonnie
