Hey Juan, I increase the settings when mixing because adding effects and automation, plus more tracks (I usually mute the ones that aren't necessary when recording) consumes more processing power. The computer I use is not particularly powerful. I suppose that this may not make any difference, but it has worked for me anyway. Maybe I'll try some stress-tests and see what it takes to get x-runs with high-latency mixing and med to low-latency mixing.
good luck. Philip Schleihauf [email protected] On Fri, Feb 6, 2009 at 6:29 PM, juan pablo <[email protected]> wrote: > 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 > -- Ubuntu-Studio-users mailing list [email protected] Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-studio-users
