[Jack-Devel] Jack Problems

[liebrecht at grossmann-venter.com]

Holger, I have a question regarding your very good instructions below.

As far as I know Alsa handles all the 1818VSL and other USB interface 
connections..
How is that going to influence my abilty to use audio interfaces as now 
alsa wont be able to access the usb ports directly when I follow the 
link advice you included in your message. If I understand it right


Otherwise

I will write a script with a rollback section so that other people dont 
have to battle with jack unnecessarily which is currently the case.

I will try to do something constructive for jack, and hopes it will 
solve my problem. If it does I will post the script. There is just about 
NotHING available to help new jack users unless they come here.






On 2019-03-22 04:27, Holger Marzen wrote:
> On Fri, 22 Mar 2019, liebrecht at grossmann-venter.com wrote:
> 
>> I am moving to Motu which will really6 ease things up. The Presonus 
>> gear is
>> not very well thought through, but it is not the problem here.
> 
> Good luck.
> 
>> I am hesitant to use jack as it almost never work consistently, 
>> pulseaudio at
>> least works. If I uninstall pulseaudio I will lose all my bluetooth 
>> enabled
>> ipads and galaxys etc. That works just great. Pulse has other problems 
>> being a
>> systemd applicat5ion there is a lot of built in garbage I agree, but 
>> wihout it
>> I dont think anything can take its place currently.
> 
> The problem isn't jack but the multitude of audio systems with Linux.
> 
> The biggest problem for a jack newbie is to reliably keep Pulsaudio 
> away
> from the audio adapter hardware. It grabs the adapter and then jackd
> can't use it.
> 
> Solution:
> Configure Pulseaudio NOT to use the soundcard but jack-sink and
> jack-source, so it outputs to a running jackd.
> There are many ways to do it. I use /etd/pulse/default.pa with
> 
> load-module module-jack-source
> load-module module-jack-sink channels=2
> 
> The addition "channels=2" is important when you have an audio interface
> with more than 2 channels, e.g. the Focusrite Scarlett 2i4. Without
> "channels=2" the SoundCloud player sounds odd because Pulseaudio 
> fiddles
> around with the channels. Maybe there is another solution, too.
> 
> See http://marzen.de/Holger/pulseaudio_and_jack/
> 
> Regards
> Holger