Thank you Philip for your information. Maybe the problem is in the periods/frames and periods/buffer. The configuration I used in my last test was: Periods/frames: 64 Periods/buffer: 3
Tomorrow I have to make my second test and i´ll try the 256/2 that you comment. And about your settings when mixing (1024/3)... why?? Is not indifferent in the process of mixing? Tomorrow I tell you the result. And what about the noise gates and compressors for the mixing? I dont know if this site is the correct site to talk about this technicalities. If not.... please tell me. Thanks to all On Fri, Feb 6, 2009 at 8:30 PM, Philip Schleihauf <[email protected]> wrote: > After doing a bit more research I've found that daisy-chaining two > fireboxes is supposed to be impossible. Presonus' drivers can't do it. > I never would have expected the open-source alternative to provide > more functionality, that's just awesome. > > It seems like setting up multiple firepods on windows/mac is very > complicated. I guess you can only use the outputs on one of them or > something.... when I hook up both fireboxes I get all the inputs and > all the outputs. I just plug them in and start jack. > > If I can get my hands on a laptop, I'll install UStudio on it and take > it and my firebox to a music store and see if I can chain it with a > firepod. Man, would it be nice to just run a FW cable out from the > control room instead of all those XLRs or a snake, and still have some > ins and outs available right on the desk. > > Anyway, getting back on-topic a bit, Juan: > > If you are using Ubuntu Studio, you will already have the RT > (realtime) kernel. This will allow you to use much lower latency > settings, without getting x-runs. > In order to actually use RT, you need to make sure that RealTime is > enabled from the "Setup" window in Jack Control. > It should be the very first check box under Parameters. > The other potential causes of x-runs are the frames/period, Sample > Rate, Periods/buffer, and Audio. > > For simple sessions, these setting work for me: > Frames/Period: 256 > Periods/Buffer: 2 > > Most of the time I am recording music, which will most likely be > distributed on CD. I use a sample rate of 44100 because that is the > sample rate that CDs use. When I do music for movies, I use 48000, > because that is the sample rate for DVDs. Perhaps someone will correct > me on this, but I think converting from 48000 to 44100 Hz would > actually result in slightly lower quality than something recorded at > 44100. > Just bear in mind that higher sampling rates mean higher latencies, > and more processing power, which could contribute to x-runs. > > Finally, the Audio setting, which by default is at "Duplex", can be > set to "Capture Only" if you are having lots of problems with x-runs. > With this setup, you will not be able to play back audio from the > computer. I don't think resorting to this is ever really needed, > except in cases like my 2001 iBook which refuses to power my FireBOX > unless it's at "Capture Only". > > These settings (at 44100 Hz) will produce 11.6 MSec of latency. > That's.... good enough. If the singer needs to hear themselves through > headphones, there will be a barely-noticeable delay. Anything under 10 > msec would be better, but that's where I start running into x-runs. If > you don't need to monitor tracks, you can push the latency up to > 69.7msec (1024 frames, 3 periods - default JACK settings), and you > should be very safe from x-runs. I use this setting when mixing, and > adding effects after the recording is done. > > Presonus products can technically do 0-latency monitoring. They can > route inputs directly to outputs within the actual fire-whatever. > However this is impossible (as far as I know) with linux. It has to be > done from the Presonus software. I tried once to get that software to > work under WINE, to no avail. Anyone have any luck getting 0-latency > on presonus products? > > Sorry this message is so long. > > Good luck, > > Philip Schleihauf > [email protected] > > > > On Fri, Feb 6, 2009 at 1:12 PM, [email protected] <[email protected]> wrote: >> From what I've read on this on the windows side, the second pod needs to be >> set to be slave. I also read something about setting them to sync via >> spdif... >> >> The fact that you've actually done it is promising. >> >> There are some posts about defining which device is to be first and second. >> >> Some of this may need to be configged in the pod. THe windows application >> that shipps with them can do this, I'm wondering if the ffado-tools has >> anything that can do the same. >> >> Mac >> >> Original Message: >> ----------------- >> From: Philip Schleihauf [email protected] >> Date: Fri, 6 Feb 2009 12:05:51 -0500 >> To: [email protected] >> Subject: Re: Presonus >> >> >> Hey >> >> I've got a presonus firebox, which is the little version of the firepod I >> guess. >> >> When I use the RT kernel I don't get any x-runs, unless I set insane >> parameters on the frames/period and periods/buffer. >> >> As far as daisy-chaining goes: >> I often daisy-chain it with my friend's firebox. It works very well. >> There's only two problems: >> 1- sometimes when I start JACK they are out of sync from each other by >> the amount of latency that jack is set to. So If jack is at 11.6msec, >> one of them will be at 11.6, but the other one will record at 23.2. >> This problem is totally random. Sometimes it does this and sometimes it >> doesn't. >> 2- The order the connections show up in jack sometimes changes. This >> can be very annoying if jack crashes in a session, and I have to >> restart it; often the order will have switched. Then I have to redo >> all the connections. >> Presonus claims that daisy-chaining firepods works, but they don't say >> that fireboxes can be daisy-chained. I think you'd be ok with the >> firepods. >> >> Does anyone know if it is possible to daisy-chain a firebox with a >> firepod? That's my dream at this point. >> >> >> Philip Schleihauf >> [email protected] >> >> >> >> On Fri, Feb 6, 2009 at 10:47 AM, [email protected] <[email protected]> >> wrote: >>> >>>>Original Message: >>>>----------------- >>>>From: juan pablo [email protected] >>>>Date: Fri, 6 Feb 2009 10:38:24 +0100 >>>>To: [email protected] >>>>Subject: Presonus >>> <snip> >>>>I´m new in the list and, i´m very excited with ubuntu studio and my new >>>>presonus firepod. >>>> >>>>All seem to work fine. I get some xrun... maybe i still have to adjust >>>>some parameter. >>>> >>>>Someone in the list with the presonus firepod?? >>>> >>>>Some example of garage music recording, mixing and mastering with >>>>ubuntu studio and the presonus? >>> >>> Hi Juan, >>> >>> I have a firepod. I hope to actually daisy chain two of them eventually >> but >>> it appears no one has attempted that in Linux land... >>> >>> I am using UBStudio hardy 64bit, so I have the rt kernel. I found if I got >>> all the latest Jack, ardour, ffado, etc that xruns are very few. >>> >>> Mac >>> >>> -------------------------------------------------------------------- >>> mail2web.com - Microsoft(R) Exchange solutions from a leading provider - >>> http://link.mail2web.com/Business/Exchange >>> >>> >>> >>> -- >>> Ubuntu-Studio-users mailing list >>> [email protected] >>> Modify settings or unsubscribe at: >> https://lists.ubuntu.com/mailman/listinfo/ubuntu-studio-users >>> >> >> -- >> Ubuntu-Studio-users mailing list >> [email protected] >> Modify settings or unsubscribe at: >> https://lists.ubuntu.com/mailman/listinfo/ubuntu-studio-users >> >> -------------------------------------------------------------------- >> mail2web LIVE – Free email based on Microsoft(R) Exchange technology - >> http://link.mail2web.com/LIVE >> >> >> >> -- >> Ubuntu-Studio-users mailing list >> [email protected] >> Modify settings or unsubscribe at: >> https://lists.ubuntu.com/mailman/listinfo/ubuntu-studio-users >> > > -- > Ubuntu-Studio-users mailing list > [email protected] > Modify settings or unsubscribe at: > https://lists.ubuntu.com/mailman/listinfo/ubuntu-studio-users > -- Ubuntu-Studio-users mailing list [email protected] Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-studio-users
