Re: [LAD] 9 soundcards ?
What is the use case for many sound cards ? Is it channel count or the need for networking or both ? Matt On 12/11/19 8:41 am, Nick Copeland wrote: * I'd like to run up to nine soundcards with Jack. * Ha, I'll raise you two. I'd like to run 11 sounds cards with Jack. At 192 mega bored. Raise me if you dare, I have a good hand, it's prime. "at the end of the day its nil nil at half time???. Trevor Brooking *From:* Linux-audio-dev on behalf of lacu...@gmx.net *Sent:* Monday, November 11, 2019 8:26 PM *To:* linux-audio-dev@lists.linuxaudio.org *Subject:* [LAD] 9 soundcards ? Hello, * I'd like to run up to nine soundcards with Jack. * Eight times Expert Sleepers ES-8 via USB and one RME Madi HDSPe card on a PCIe slot. In Linux at 96 kilobauds. I read here https://jackaudio.org/faq/multiple_devices.html about clocking issues as each card is run by it's own clock. *Will the asynchronously clocked streams be handled and merged by Jack or is this an ongoing issue? * I imagine, if I'd feed analog outputs of one card into the analog inputs of another, this wouldn't be ideal. But I am wondering if Jack is handling the asynchronous streams in the software-domain without glitches ect. ? *With a powerful computer is the latency going to rise absurdly high? Any experience with this? * As Jack-Devel-List is dead, I'm asking here. With best regards, Manuel ___ Linux-audio-dev mailing list Linux-audio-dev@lists.linuxaudio.org https://lists.linuxaudio.org/listinfo/linux-audio-dev ___ Linux-audio-dev mailing list Linux-audio-dev@lists.linuxaudio.org https://lists.linuxaudio.org/listinfo/linux-audio-dev
Re: [LAD] 9 soundcards ?
I'd like to run up to nine soundcards with Jack. Ha, I'll raise you two. I'd like to run 11 sounds cards with Jack. At 192 mega bored. Raise me if you dare, I have a good hand, it's prime. "at the end of the day its nil nil at half time???. Trevor Brooking From: Linux-audio-dev on behalf of lacu...@gmx.net Sent: Monday, November 11, 2019 8:26 PM To: linux-audio-dev@lists.linuxaudio.org Subject: [LAD] 9 soundcards ? Hello, I'd like to run up to nine soundcards with Jack. Eight times Expert Sleepers ES-8 via USB and one RME Madi HDSPe card on a PCIe slot. In Linux at 96 kilobauds. I read here https://jackaudio.org/faq/multiple_devices.html about clocking issues as each card is run by it's own clock. Will the asynchronously clocked streams be handled and merged by Jack or is this an ongoing issue? I imagine, if I'd feed analog outputs of one card into the analog inputs of another, this wouldn't be ideal. But I am wondering if Jack is handling the asynchronous streams in the software-domain without glitches ect. ? With a powerful computer is the latency going to rise absurdly high? Any experience with this? As Jack-Devel-List is dead, I'm asking here. With best regards, Manuel ___ Linux-audio-dev mailing list Linux-audio-dev@lists.linuxaudio.org https://lists.linuxaudio.org/listinfo/linux-audio-dev
Re: [LAD] 9 soundcards ?
Hi Manuel, It looks like those ES-8's have ADAT I/O. Could you sync their internal clocks by daisy chaining them via ADAT I/O off of the RME's ADAT output? - Mike On Mon, Nov 11, 2019 at 2:43 PM Len Ovens wrote: > On Mon, 11 Nov 2019, lacu...@gmx.net wrote: > > > I'd like to run up to nine soundcards with Jack. > > nope, won't happen. > > > Eight times Expert Sleepers ES-8 via USB > > USB in particular will not be in sync. > > To use them together and see the i/o on jack will require an extrenal > client or two per usb device. You could use zita-ajbridge to do that which > inserts an SRC stage between the device and jack to make syncing possible. > However, you say you want to use 8 of them. This will also be a problem at > any low latency because you will be using USB hubs which have been known > to cause trouble with audio devices. so be prepared for xruns at any > buffer size less than 1024 (maybe even there). > > > and one RME Madi HDSPe card on a PCIe slot. > > Use that as your jack master. > > > > In Linux at 96 kilobauds. > > kilobauds? you mean sample rate maybe? Use 48000 and be happy, 96000 is > only good for recording bats > > > Really, I don't know how many i/o you RME Madi has (should be 64-ish?) Add > what is needed to max that out. USB mics are for the most part toys, > better to use one of the many 18 i/o USB devices out there instead most of > which do have the ability to sync with your RME. > > I would not waste my time with USB mics. > > -- > Len Ovens > www.ovenwerks.net > ___ > Linux-audio-dev mailing list > Linux-audio-dev@lists.linuxaudio.org > https://lists.linuxaudio.org/listinfo/linux-audio-dev > ___ Linux-audio-dev mailing list Linux-audio-dev@lists.linuxaudio.org https://lists.linuxaudio.org/listinfo/linux-audio-dev
Re: [LAD] 9 soundcards ?
On Mon, 11 Nov 2019, lacu...@gmx.net wrote: I'd like to run up to nine soundcards with Jack. nope, won't happen. Eight times Expert Sleepers ES-8 via USB USB in particular will not be in sync. To use them together and see the i/o on jack will require an extrenal client or two per usb device. You could use zita-ajbridge to do that which inserts an SRC stage between the device and jack to make syncing possible. However, you say you want to use 8 of them. This will also be a problem at any low latency because you will be using USB hubs which have been known to cause trouble with audio devices. so be prepared for xruns at any buffer size less than 1024 (maybe even there). and one RME Madi HDSPe card on a PCIe slot. Use that as your jack master. In Linux at 96 kilobauds. kilobauds? you mean sample rate maybe? Use 48000 and be happy, 96000 is only good for recording bats Really, I don't know how many i/o you RME Madi has (should be 64-ish?) Add what is needed to max that out. USB mics are for the most part toys, better to use one of the many 18 i/o USB devices out there instead most of which do have the ability to sync with your RME. I would not waste my time with USB mics. -- Len Ovens www.ovenwerks.net ___ Linux-audio-dev mailing list Linux-audio-dev@lists.linuxaudio.org https://lists.linuxaudio.org/listinfo/linux-audio-dev
Re: [LAD] 9 soundcards ?
On Mon, Nov 11, 2019 at 12:26 PM wrote: > > Hello, > > > * I'd like to run up to nine soundcards with Jack. * > > Eight times Expert Sleepers ES-8 via USB > and one RME Madi HDSPe card on a PCIe slot. > > In Linux at 96 kilobauds. > > I read here > https://jackaudio.org/faq/multiple_devices.html > about clocking issues as each card is run by it's own clock. > > *Will the asynchronously clocked streams be handled and merged by Jack or > is this an ongoing issue? * > JACK2 (the one most commonly installed on Linux systems) can't do this by itself (for now) You would use an instance of zita_a2j to connect each "secondary" card to the JACK server which is using the "master" card. zita_a2j will resample as needed to keep things in sync. JACK1 can do this by itself because it has zita_a2j built in. However, it is a slightly older version of zita_a2j and I discovered recently that it doesn't handle xruns as well as the current zita_a2j. > > > I imagine, if I'd feed analog outputs of one card into the analog inputs > of another, this wouldn't be ideal. > But I am wondering if Jack is handling the asynchronous streams in the > software-domain without glitches ect. ? > > *With a powerful computer is the latency going to rise absurdly high? Any > experience with this? * > Number of cards has nothing to do with latency directly. "Servicing" each card will consume some of the time available for audio processing. How much is hard to say, but with mid-size buffer sizes, I would not guess that it will be too large. Since you are not sharing word clock, they will drift and zita_a2j will have to do resampling, which will also consume some CPU cycles. ___ Linux-audio-dev mailing list Linux-audio-dev@lists.linuxaudio.org https://lists.linuxaudio.org/listinfo/linux-audio-dev
[LAD] 9 soundcards ?
Hello, I'd like to run up to nine soundcards with Jack. Eight times Expert Sleepers ES-8 via USB and one RME Madi HDSPe card on a PCIe slot. In Linux at 96 kilobauds. I read here https://jackaudio.org/faq/multiple_devices.html about clocking issues as each card is run by it's own clock. Will the asynchronously clocked streams be handled and merged by Jack or is this an ongoing issue? I imagine, if I'd feed analog outputs of one card into the analog inputs of another, this wouldn't be ideal. But I am wondering if Jack is handling the asynchronous streams in the software-domain without glitches ect. ? With a powerful computer is the latency going to rise absurdly high? Any experience with this? As Jack-Devel-List is dead, I'm asking here. With best regards, Manuel ___ Linux-audio-dev mailing list Linux-audio-dev@lists.linuxaudio.org https://lists.linuxaudio.org/listinfo/linux-audio-dev
[LAD] Berlin Linux Audio meeting @ c-base 2019-11-12
Hi. Tomorrow Tuesday it's again the Linux audio meeting at c-base in Berlin. See you there at 20. Cheers /Daniel ___ Linux-audio-dev mailing list Linux-audio-dev@lists.linuxaudio.org https://lists.linuxaudio.org/listinfo/linux-audio-dev
