Re: Alesis io 2 express (was: cheap usb-audio-interface)
Am Fri, 11 Feb 2011 20:34:55 +0100 schrieb mentoj dija mentoj_d...@gmx.de: was the only working one. apart from the dummy-driver ;-) On 11.02.2011 15:58, Ricardo Lameiro wrote: why are you using the OSS driver? Heck, I did not spot that: Yeah, having to use the OSS emulation of ALSA is strange, and I don't expect it to work well with JACK -- at minimum you will get horrible latency regardless of your JACK periods. The io|2 should be driven using ALSA directly -- unless of course, you indeed have OSS4 installed and we are not talking about ALSA's OSS emulation. Alrighty then, Thomas. signature.asc Description: PGP signature -- Ubuntu-Studio-users mailing list Ubuntu-Studio-users@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-studio-users
Re: Alesis io 2 express (was: cheap usb-audio-interface)
well, i was just playing around. have no idea whats the different drivers do. apart for the firewire-driver of course. and the dummy ;-) the oss-thing seemed to be the only working one. i dont have 0ss4 installed. just the regular 10.04 installation... On 12.02.2011 12:35, Thomas Orgis wrote: Am Fri, 11 Feb 2011 20:34:55 +0100 schrieb mentoj dijamentoj_d...@gmx.de: was the only working one. apart from the dummy-driver ;-) On 11.02.2011 15:58, Ricardo Lameiro wrote: why are you using the OSS driver? Heck, I did not spot that: Yeah, having to use the OSS emulation of ALSA is strange, and I don't expect it to work well with JACK -- at minimum you will get horrible latency regardless of your JACK periods. The io|2 should be driven using ALSA directly -- unless of course, you indeed have OSS4 installed and we are not talking about ALSA's OSS emulation. Alrighty then, Thomas. -- Ubuntu-Studio-users mailing list Ubuntu-Studio-users@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-studio-users
Re: Alesis io 2 express (was: cheap usb-audio-interface)
Am Thu, 10 Feb 2011 22:25:43 +0100 schrieb mentoj dija mentoj_d...@gmx.de: I got an Alesis io2 express audio interface now. after playing around with the jack-parameters, it's working with this preferences (look at the attachment). but with lots of x-runs and this error-messages: Don't blame the interface... I got an io|2 (without express, that's the same hardware just with digital SP/DIF ports still present) and I can do jackd -R -d alsa -d hw:1,0 -r 48000 -p 128 -n3 (that is, period size of 128 compared to your 512, period count of 3 instead of your 4, rate 48000) on my Thinkpad X200 without trouble, loading ardour2 and playback of a 7-track Project does not yield a single xrun. Also switching to your sample rate of 44100 does not seem to bother the system. But: On another laptop I once used, this setting would not work at all. It would be full with xruns all the time, if not worse. That machine needs a setting of 3*1024 to do reliable recordings (so, no realtime processing work, except delay effects:-/). That other box is also similary bad at getting reliable recordings with the internal audio, so USB really is a secondary factor. So, there could be something you can do to optimize your system setup (realtime / lowlat kernel, stop any background processes -- I once had some cron job scratching all over the disk and grinding jackd to a halt on that other laptop), but it might be that your hardware doesn't allow for low-latency recordings. Your computer that is -- that is my main message; your problems most probably lie on the other side of the USB cable, not the io|2. Does it at least work at 3*1024 periods? For a quick system configuration check, it may be good to just boot an AVLinux live system and check how well the interface works for you there. If that's better, you know that you should be able to tweak your installed system likewise. Alrighty then, Thomas. signature.asc Description: PGP signature -- Ubuntu-Studio-users mailing list Ubuntu-Studio-users@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-studio-users
Re: Alesis io 2 express (was: cheap usb-audio-interface)
thanks for the answer, i dont blame the interface. i'm sure there is a solution. i'll check out your configurations later and report. by the way: i got a firepod running very well on this pc. so it's just a matter of drivers i think. this is actually a present for a friend. so maybe its not very wise to keep it running on my pc. i'll probably have other problems on her laptop. so hang on for now with more answers... On 11.02.2011 09:24, Thomas Orgis wrote: Am Thu, 10 Feb 2011 22:25:43 +0100 schrieb mentoj dijamentoj_d...@gmx.de: I got an Alesis io2 express audio interface now. after playing around with the jack-parameters, it's working with this preferences (look at the attachment). but with lots of x-runs and this error-messages: Don't blame the interface... I got an io|2 (without express, that's the same hardware just with digital SP/DIF ports still present) and I can do jackd -R -d alsa -d hw:1,0 -r 48000 -p 128 -n3 (that is, period size of 128 compared to your 512, period count of 3 instead of your 4, rate 48000) on my Thinkpad X200 without trouble, loading ardour2 and playback of a 7-track Project does not yield a single xrun. Also switching to your sample rate of 44100 does not seem to bother the system. But: On another laptop I once used, this setting would not work at all. It would be full with xruns all the time, if not worse. That machine needs a setting of 3*1024 to do reliable recordings (so, no realtime processing work, except delay effects:-/). That other box is also similary bad at getting reliable recordings with the internal audio, so USB really is a secondary factor. So, there could be something you can do to optimize your system setup (realtime / lowlat kernel, stop any background processes -- I once had some cron job scratching all over the disk and grinding jackd to a halt on that other laptop), but it might be that your hardware doesn't allow for low-latency recordings. Your computer that is -- that is my main message; your problems most probably lie on the other side of the USB cable, not the io|2. Does it at least work at 3*1024 periods? For a quick system configuration check, it may be good to just boot an AVLinux live system and check how well the interface works for you there. If that's better, you know that you should be able to tweak your installed system likewise. Alrighty then, Thomas. -- Ubuntu-Studio-users mailing list Ubuntu-Studio-users@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-studio-users
Re: Alesis io 2 express (was: cheap usb-audio-interface)
On Fri, 2011-02-11 at 13:16 +0100, mentoj dija wrote: thanks for the answer, i dont blame the interface. i'm sure there is a solution. i'll check out your configurations later and report. by the way: i got a firepod running very well on this pc. so it's just a matter of drivers i think. this is actually a present for a friend. so maybe its not very wise to keep it running on my pc. i'll probably have other problems on her laptop. so hang on for now with more answers... Just to add a +1 My io2 express works just fine also. Best, Tim signature.asc Description: This is a digitally signed message part -- Ubuntu-Studio-users mailing list Ubuntu-Studio-users@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-studio-users
Re: Alesis io 2 express (was: cheap usb-audio-interface)
what are your parameters?` On 11.02.2011 13:25, Tim Cook wrote: On Fri, 2011-02-11 at 13:16 +0100, mentoj dija wrote: thanks for the answer, i dont blame the interface. i'm sure there is a solution. i'll check out your configurations later and report. by the way: i got a firepod running very well on this pc. so it's just a matter of drivers i think. this is actually a present for a friend. so maybe its not very wise to keep it running on my pc. i'll probably have other problems on her laptop. so hang on for now with more answers... Just to add a +1 My io2 express works just fine also. Best, Tim -- Ubuntu-Studio-users mailing list Ubuntu-Studio-users@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-studio-users
Re: Alesis io 2 express (was: cheap usb-audio-interface)
On Fri, 2011-02-11 at 20:36 +0100, mentoj dija wrote: what are your parameters?` /usr/bin/jackd -P60 -t1000 -dalsa -r48000 -p256 -n2 -D -Chw:1,0 -Phw:1,0 -i2 -o2 -- *** Timothy Cook, MSc Project Lead - Multi-Level Healthcare Information Modeling http://www.mlhim.org LinkedIn Profile:http://www.linkedin.com/in/timothywaynecook Skype ID == timothy.cook Academic.Edu Profile: http://uff.academia.edu/TimothyCook You may get my Public GPG key from popular keyservers or from this link http://timothywayne.cook.googlepages.com/home signature.asc Description: This is a digitally signed message part -- Ubuntu-Studio-users mailing list Ubuntu-Studio-users@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-studio-users