JackAudio

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602 discussions

[Jack-Devel] What functions are missing if ALSA cannot memmap?

by Chris Caudle

I am helping check out a new ALSA driver, and it seems that jackd is not happy with the capabilities this driver provides: configuring for 48000Hz, period = 1024 frames (21.3 ms), buffer = 2 periods ALSA: mmap-based access is not possible for the capture stream of this audio interface ALSA: cannot configure capture channel Not just capture: configuring for 48000Hz, period = 1024 frames (21.3 ms), buffer = 2 periods ALSA: mmap-based access is not possible for the playback stream of this audio interface ALSA: cannot configure playback channel I am not very familiar yet with low level ALSA drivers, any tips where I should look to see what the driver messed up? Is mmap access usually a requirement for ALSA drivers? Is it technically optional but highly recommended, or it is required and this driver is just incomplete? -- Chris Caudle

7 years

Re: [Jack-Devel] Adjustable port alias limit

by Ralf Mardorf

On Mon, 28 Jan 2019 12:01:56 -0500, Sunset Tech wrote: >On Mon, Jan 28, 2019, 11:15 AM Ralf Mardorf wrote: >>FWIW apart from jack audio, there are also jack and ALSA midi >>available. AFAIK when for example using two TerraTec EWX 24/96 PCI >>cards as MIDI interfaces, there is no way at all to restore MIDI >>connections automatically. The only way is to do all MIDI IO >>connections with those cards manually. Even changing the name of at >>least one card, does only affect audio, the MIDI names of identical >>PCI cards are always the same. >I'll admit i am not sure what your general thought here is? depending >on the method used to restore connections, with the script I wrote one >of these devices could be oneshot assigned group aliases for its midi >ports, and then connections restored from there How does your script find out to what card it assigned the aliases? Have you ever used two or more identical PCI cards as MIDI interface?

7 years, 1 month

[Jack-Devel] Adjustable port alias limit

by Sunset Tech

Greetings! I attempted to see if there was any work or discussion on this, but brought up nothing, I hope I am not duplicating some effort/thought here. I recently developed a small script allowing me to assign ports to groups, using aliases, so that I may autoconnect these groups to ardour buses. However, I quickly discovered there is a limit of two aliases per port, which is admittedly workable, but not pleasantly so. perhaps there is a better method of achieving this functionality? but I wanted to continue using jack-matchmaker. So I've patched a local copy of jack2 to allocate an array for aliases per port, and allow its size to be specified via the compile time flag --aliases-per-port. However, the implementation is not the best, I needed to introduce a seperate version of jack_port_get_aliases, suffixed with _b, which can be used in conjunction a new function, jack_port_max_aliases, to safely retrieve aliases beyond the first two. applications using the old jack_port_get_aliases will still be shown only the first two aliases in the list. however the matching functions will match against all aliases. Additionally there is what looks like serialization&matching code in JackDriver, which i have not yet attempted to patch. I've also patched copys of jack-matchmaker and luajack to make use of this. I dont imagine such functionality would be accepted into jack in its current state? it seems there is sort of a bind here regarding external api design. I would love to contribute this to jack, so i'm emailing to see what the possibility of that is, and if anyone has any ideas about how to go about it. I am willing to patch jack1 as well for it, the relevant code looks near identical. I would also like to dynamically manage the array size or string memory allocation, perhaps within the limit, as statically allocating even port_num*(alias_limit=8)*name_size to store mostly unused aliases seems rather heavy, but it looked like everything regarding ports is statically allocated for a reason?

7 years, 1 month

[Jack-Devel] pulseaudio-jack-{source, sink} modules choke on jack_freewheel mode

by Rui Nuno Capela

hi everyone is it just on me or the pulseaudio-jack-{source,sink} modules do choke after a little while after jack_freewheel is set on? for example, audio exporting in qtractor: uses the jack freewheeling mode for its work, but always stops or freezes after the first couple of seconds *iif* the pulseaudio bridge modules are around. this is just terrible and awful behavior, especially when jackdbus service is in charge (meaning the vast of jack2 installs nowadays), it does bring up the pulseaudio-jack bridge/modules always under the graph, no questions asked. dang. again sorry to ask, is it just me or is it there any knowledge im failing to recall? cheers -- rncbc aka. Rui Nuno Capela rncbc(a)rncbc.org

7 years, 1 month

[Jack-Devel] Need some help with Jack

by LION .

Hey mate. I have recently installed a copy of JACK onto my MAC and have been trying to use Mainstage 3 in Ableton live. I can't seem to figure out how to do this and was wondering if you could help me out as I just paid apple $47 for there instruments and can't use them. Kind regards Alex

7 years, 1 month

[Jack-Devel] netjack in STM32?

by Gersa mail

Hello. I ask forgiveness in advance for the poor knowledge of English. I would like to ask a few questions about Jack and NetJack. 1. How would you react to trying to port Jack and Netjack to hardware (like the Dante network), what could be the subtleties and inconveniences of porting? At the moment, I'm starting to study the Jack code, in the future I will try to port to STM32. 2. I understand that at the moment you can only use one master device on the network, in both cases will arise out of sync because of the spread of timing generators. If I manage to solve this problem in hardware, is it possible to use several master devices(at the same frequency)? P.S. the STM32 will also implement a fully digital amplifier and audio capture with 32-bit accuracy, an additional convolver in the embedded DSP. Or a microphone with an Ethernet interface or WiFi (I know wifi is very bad because of the big delay)

7 years, 1 month

[Jack-Devel] About using Jack audio connection kit with thunderbolt connection

by 김영석

To whom it may concernHello. This is Yeongseok Kim, a Ph.D. student in KAIST, South Korea.I really appreciate all the works which has been and being done by Jack audio developers.I was wondering if there would be any difficulties for using a device connected to PC via thunderbolt 3 with Jack audio connection kit.Would I be able to use Jack audio connection kit with the device if PC recognizes the device connection via thunderbolt 3?Thank you so much for your help.Best regards.Yeongseok Kim

7 years, 1 month

Re: [Jack-Devel] About using Jack audio connection kit with thunderbolt connection

by liebrecht＠grossmann-venter.com

I think it is possible if you have an Intel I210-T1 network card, but I am not a jack developer, so someone else should have a more clear answer. 김영석 wrote: > To whom it may concern > > > https://server54.web-hosting.com:2096/cpsess9557733042/3rdparty/roundcube/?… > Hello. This is Yeongseok Kim, a Ph.D. student in KAIST, South Korea. > > > > I really appreciate all the works which has been and being done by Jack > audio developers. > > > > I was wondering if there would be any difficulties for using a device > connected to PC via thunderbolt 3 with Jack audio connection kit. > > > > Would I be able to use Jack audio connection kit with the device if PC > recognizes the device connection via thunderbolt 3? > > > > Thank you so much for your help. > > > > Best regards. > > > > Yeongseok Kim > >

7 years, 1 month

[Jack-Devel] Phishing/blackmail spam

by John Rigg

Is anyone else receiving phishing/blackmail spam sent to the email address (unique in my case) they use for jack-devel? It seems that a list member has been infected with malware or someone signed up just to get access to list members' email addresses. The messages typically include the name 'Mario Moles' somewhere in the header or message body (location varies). I've seen that name before in spam sent to my jack-devel email address. John

7 years, 1 month

[Jack-Devel] windows

by 1213729945

Dear: I want to read the time code in the audio port of windows system. The time code was generated by a German time code device named TENTACLE SYNC . What should I do?

7 years, 2 months

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