Starting application before firewire device is ready
To use an audio application requiring jackd-firewire, I have to start up things in the following order:
- Power up the hardware interface (a Phonic mixing console in my case)
- Start jackd
- Start the audio application
Any other order will make the audio application complain about "no jack" so I have to close it and then run the above sequence.
When the hw interface is off, the /dev/fw1 device simply does not exist. Creating /dev/fw1 with mknod does not help - jackd will not start with such a "dead" device.
vs. built-in soundcard
This is in contrast to a built-in soundcard, where the /dev-device is always there when the computer is running.
vs. Pulseaudio
Even pulseaudio configured to use firewire output allows me to turn the hw interface off and back on. Sound will just stop and resume, and the application does not complain (I only tested this with google-chrome playing a movie).
udev
I know how to use udev to start jackd when /dev/fw1 comes to existence. But I still have to exit the audio application in case I forgot to power up the hw ifc prior to starting the application.
My question
Is there a way to let the application believe it can connect to jackd even when jackd does not see a firewire device? Ideally I would like to be able to disconnect the hardware while the application is running without any ill effects, except hearing no sound.
audio daemon jack firewire
asked Nov 9 '18 at 22:24
Martin Drautzburg
8081916
add a comment |
To use an audio application requiring jackd-firewire, I have to start up things in the following order:
- Power up the hardware interface (a Phonic mixing console in my case)
- Start jackd
- Start the audio application
Any other order will make the audio application complain about "no jack" so I have to close it and then run the above sequence.
When the hw interface is off, the /dev/fw1 device simply does not exist. Creating /dev/fw1 with mknod does not help - jackd will not start with such a "dead" device.
vs. built-in soundcard
This is in contrast to a built-in soundcard, where the /dev-device is always there when the computer is running.
vs. Pulseaudio
Even pulseaudio configured to use firewire output allows me to turn the hw interface off and back on. Sound will just stop and resume, and the application does not complain (I only tested this with google-chrome playing a movie).
udev
I know how to use udev to start jackd when /dev/fw1 comes to existence. But I still have to exit the audio application in case I forgot to power up the hw ifc prior to starting the application.
My question
Is there a way to let the application believe it can connect to jackd even when jackd does not see a firewire device? Ideally I would like to be able to disconnect the hardware while the application is running without any ill effects, except hearing no sound.
audio daemon jack firewire
asked Nov 9 '18 at 22:24
Martin Drautzburg
8081916
add a comment |
To use an audio application requiring jackd-firewire, I have to start up things in the following order:
- Power up the hardware interface (a Phonic mixing console in my case)
- Start jackd
- Start the audio application
Any other order will make the audio application complain about "no jack" so I have to close it and then run the above sequence.
When the hw interface is off, the /dev/fw1 device simply does not exist. Creating /dev/fw1 with mknod does not help - jackd will not start with such a "dead" device.
vs. built-in soundcard
This is in contrast to a built-in soundcard, where the /dev-device is always there when the computer is running.
vs. Pulseaudio
Even pulseaudio configured to use firewire output allows me to turn the hw interface off and back on. Sound will just stop and resume, and the application does not complain (I only tested this with google-chrome playing a movie).
udev
I know how to use udev to start jackd when /dev/fw1 comes to existence. But I still have to exit the audio application in case I forgot to power up the hw ifc prior to starting the application.
My question
Is there a way to let the application believe it can connect to jackd even when jackd does not see a firewire device? Ideally I would like to be able to disconnect the hardware while the application is running without any ill effects, except hearing no sound.
audio daemon jack firewire
asked Nov 9 '18 at 22:24
Martin Drautzburg
8081916
To use an audio application requiring jackd-firewire, I have to start up things in the following order:
- Power up the hardware interface (a Phonic mixing console in my case)
- Start jackd
- Start the audio application
Any other order will make the audio application complain about "no jack" so I have to close it and then run the above sequence.
When the hw interface is off, the /dev/fw1 device simply does not exist. Creating /dev/fw1 with mknod does not help - jackd will not start with such a "dead" device.
vs. built-in soundcard
This is in contrast to a built-in soundcard, where the /dev-device is always there when the computer is running.
vs. Pulseaudio
Even pulseaudio configured to use firewire output allows me to turn the hw interface off and back on. Sound will just stop and resume, and the application does not complain (I only tested this with google-chrome playing a movie).
udev
I know how to use udev to start jackd when /dev/fw1 comes to existence. But I still have to exit the audio application in case I forgot to power up the hw ifc prior to starting the application.
My question
Is there a way to let the application believe it can connect to jackd even when jackd does not see a firewire device? Ideally I would like to be able to disconnect the hardware while the application is running without any ill effects, except hearing no sound.
audio daemon jack firewire
audio daemon jack firewire
asked Nov 9 '18 at 22:24
Martin Drautzburg
8081916
asked Nov 9 '18 at 22:24
Martin Drautzburg
8081916
asked Nov 9 '18 at 22:24
Martin Drautzburg
8081916
asked Nov 9 '18 at 22:24
Martin Drautzburg
8081916
asked Nov 9 '18 at 22:24
Martin Drautzburg
8081916
8081916
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
JACK is usually configured to use a specific audio device
if audio device is not available JACK cannot start
If JACK is running and device is disconnected, JACK will crash
JACK can be started with driver option changed to 'dummy' and run with no audio device
I know how to add other audio devices to JACK manually with alsa_in and alsa_out and it may be possible to use similar commands to add firewire devices manually for inputs and outputs. But, any manually added connection to firewire device would have to be removed before disconnecting device, only gain here is not needing to stop JACK
Considering you preferred using mixer in Pulseaudio it may be better for you to:
- Keep mixer running in Pulseaudio;
- Run JACK with dummy driver;
- Use Pulseaudio JACK Sink and Pulseaudio JACK Source connections to connect the application in JACK to mixer in Pulseaudio
(may need to install packagepulseaudio-jackto get the sink and source connections)
answered Dec 19 '18 at 3:55
nik gnomic
1813
I ended up writing awithJackstartup script that pops up an alert when jack is not running and otherwise starts the audio application that is passed as a parameter. This saves me from needlessly starting the audio application.
– Martin Drautzburg
Dec 21 '18 at 1:27
add a comment |
Your Answer
StackExchange.ready(function() {
var channelOptions = {
tags: "".split(" "),
id: "106"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
}
});
function createEditor() {
StackExchange.prepareEditor({
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: false,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: null,
bindNavPrevention: true,
postfix: "",
imageUploader: {
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
},
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
});
}
});
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2funix.stackexchange.com%2fquestions%2f480864%2fstarting-application-before-firewire-device-is-ready%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
JACK is usually configured to use a specific audio device
if audio device is not available JACK cannot start
If JACK is running and device is disconnected, JACK will crash
JACK can be started with driver option changed to 'dummy' and run with no audio device
I know how to add other audio devices to JACK manually with alsa_in and alsa_out and it may be possible to use similar commands to add firewire devices manually for inputs and outputs. But, any manually added connection to firewire device would have to be removed before disconnecting device, only gain here is not needing to stop JACK
Considering you preferred using mixer in Pulseaudio it may be better for you to:
- Keep mixer running in Pulseaudio;
- Run JACK with dummy driver;
- Use Pulseaudio JACK Sink and Pulseaudio JACK Source connections to connect the application in JACK to mixer in Pulseaudio
(may need to install packagepulseaudio-jackto get the sink and source connections)
answered Dec 19 '18 at 3:55
nik gnomic
1813
I ended up writing awithJackstartup script that pops up an alert when jack is not running and otherwise starts the audio application that is passed as a parameter. This saves me from needlessly starting the audio application.
– Martin Drautzburg
Dec 21 '18 at 1:27
add a comment |
JACK is usually configured to use a specific audio device
if audio device is not available JACK cannot start
If JACK is running and device is disconnected, JACK will crash
JACK can be started with driver option changed to 'dummy' and run with no audio device
I know how to add other audio devices to JACK manually with alsa_in and alsa_out and it may be possible to use similar commands to add firewire devices manually for inputs and outputs. But, any manually added connection to firewire device would have to be removed before disconnecting device, only gain here is not needing to stop JACK
Considering you preferred using mixer in Pulseaudio it may be better for you to:
- Keep mixer running in Pulseaudio;
- Run JACK with dummy driver;
- Use Pulseaudio JACK Sink and Pulseaudio JACK Source connections to connect the application in JACK to mixer in Pulseaudio
(may need to install packagepulseaudio-jackto get the sink and source connections)
answered Dec 19 '18 at 3:55
nik gnomic
1813
I ended up writing awithJackstartup script that pops up an alert when jack is not running and otherwise starts the audio application that is passed as a parameter. This saves me from needlessly starting the audio application.
– Martin Drautzburg
Dec 21 '18 at 1:27
add a comment |
JACK is usually configured to use a specific audio device
if audio device is not available JACK cannot start
If JACK is running and device is disconnected, JACK will crash
JACK can be started with driver option changed to 'dummy' and run with no audio device
I know how to add other audio devices to JACK manually with alsa_in and alsa_out and it may be possible to use similar commands to add firewire devices manually for inputs and outputs. But, any manually added connection to firewire device would have to be removed before disconnecting device, only gain here is not needing to stop JACK
Considering you preferred using mixer in Pulseaudio it may be better for you to:
- Keep mixer running in Pulseaudio;
- Run JACK with dummy driver;
- Use Pulseaudio JACK Sink and Pulseaudio JACK Source connections to connect the application in JACK to mixer in Pulseaudio
(may need to install packagepulseaudio-jackto get the sink and source connections)
answered Dec 19 '18 at 3:55
nik gnomic
1813
JACK is usually configured to use a specific audio device
if audio device is not available JACK cannot start
If JACK is running and device is disconnected, JACK will crash
JACK can be started with driver option changed to 'dummy' and run with no audio device
I know how to add other audio devices to JACK manually with alsa_in and alsa_out and it may be possible to use similar commands to add firewire devices manually for inputs and outputs. But, any manually added connection to firewire device would have to be removed before disconnecting device, only gain here is not needing to stop JACK
Considering you preferred using mixer in Pulseaudio it may be better for you to:
- Keep mixer running in Pulseaudio;
- Run JACK with dummy driver;
- Use Pulseaudio JACK Sink and Pulseaudio JACK Source connections to connect the application in JACK to mixer in Pulseaudio
(may need to install packagepulseaudio-jackto get the sink and source connections)
answered Dec 19 '18 at 3:55
nik gnomic
1813
answered Dec 19 '18 at 3:55
nik gnomic
1813
answered Dec 19 '18 at 3:55
nik gnomic
1813
answered Dec 19 '18 at 3:55
nik gnomic
1813
1813
I ended up writing awithJackstartup script that pops up an alert when jack is not running and otherwise starts the audio application that is passed as a parameter. This saves me from needlessly starting the audio application.
– Martin Drautzburg
Dec 21 '18 at 1:27
add a comment |
I ended up writing awithJackstartup script that pops up an alert when jack is not running and otherwise starts the audio application that is passed as a parameter. This saves me from needlessly starting the audio application.
– Martin Drautzburg
Dec 21 '18 at 1:27
I ended up writing a
withJack startup script that pops up an alert when jack is not running and otherwise starts the audio application that is passed as a parameter. This saves me from needlessly starting the audio application.– Martin Drautzburg
Dec 21 '18 at 1:27
I ended up writing a
withJack startup script that pops up an alert when jack is not running and otherwise starts the audio application that is passed as a parameter. This saves me from needlessly starting the audio application.– Martin Drautzburg
Dec 21 '18 at 1:27
add a comment |
Thanks for contributing an answer to Unix & Linux Stack Exchange!
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
Some of your past answers have not been well-received, and you're in danger of being blocked from answering.
Please pay close attention to the following guidance:
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2funix.stackexchange.com%2fquestions%2f480864%2fstarting-application-before-firewire-device-is-ready%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
