[SLUG] alsa, jackd, recording radio, Amarok
I'm trying to record from a radio plugged in to the line-in jack on my pc, whilst listening to music files playing on Amarok. To do this, I've started playing with jackd, but whenever I start it up with 'jackd -d alsa' I get errors: the playback device hw:0 is already in use. Please stop the application using it and run JACK again. And if I start up jackd, Amarok won't start - obviously both wanting to exclusive control over alsa. Can I use jackd at the same time as something like Amarok? Is jackd the right way to do something like this? (BTW, I can hear and toggle on/off sound input from both pcm (ie Amarok) and line using alsactl. My sound devices are: % cat /proc/asound/devices 2:: timer 3:: sequencer 4: [ 0- 4]: digital audio playback 5: [ 0- 3]: digital audio capture 6: [ 0- 2]: digital audio capture 7: [ 0- 1]: digital audio capture 8: [ 0- 0]: digital audio playback 9: [ 0- 0]: digital audio capture 10: [ 0] : control -- Sonia Hamilton -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
[SLUG] raid1 mdadm or lvm mirror's
Hi I am in the process of rebuilding my server and I am planning my disk usage. I have 2 drives. Traditionally I would do 4 partitions to make up 4 md's md0 /boot ( ~ 500M - I like have space here) sda1 + sdb1 md1 / (~10G) sda2 + sdb2 md2 swap sda3 + sdb3 md3 LVM PV sda4 + sdb4 from the PV I make a VG and then lots of LV's I have used this sort of set for a while, but what I would like to do is not make md3 and instead use sda4 + sdb4 as 2 PV and then I get the chance to decide which pv is made up of mirrored space and which is not. I have some data that I don't really care if it dies/get lost. I can't do that on a lv by lv basis with my original setup. I haven't had much experience with lvm mirrors, should I stick with my original setup or go with the new ? Alex signature.asc Description: Digital signature -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
Re: [SLUG] alsa, jackd, recording radio, Amarok
On 10/17/07, Sonia Hamilton [EMAIL PROTECTED] wrote: Can I use jackd at the same time as something like Amarok? Don't know about amarok but. - Aqualung (http://aqualung.sourceforge.net/) claims jack support, never used it so I can't vouch for it's quality compared to Amarok (I don't use amarok either :) - Gstreamer can hook into Jack now, so I've had Banshee playing through Jack (a bit of fiddling around though). So it's possible to get a media player to output to Jack (which is mostly used by the pro type apps, DAW's, midi sequencers etc.). Assuming your card supports simultaneous capture/playback then you should be able to record the radio at the same time as playing music through your media player. If you are using jack, I'd recommend using qjackctl to start/stop/configure, it lets you hook apps up to each other and to playback/capture devices using the mouse (so for example you'd connect aqualung to the playback device, and jack time machine to the capture device to record the radio). CheersSteve -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
Re: [SLUG] raid1 mdadm or lvm mirror's
On Wed, Oct 17, 2007 at 07:47:35PM +1000, Alex Samad wrote: [ ...] I have some data that I don't really care if it dies/get lost. I can't do that on a lv by lv basis with my original setup. I haven't had much experience with lvm mirrors, should I stick with my original setup or go with the new ? I think if I was to mirror on my home machine now, I would do lv mirroring for the reason you mention; you just don't need everything mirrored. In fact I don't mirror at all at the moment; I just rsync the more valuable stuff. Matt -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
Re: [SLUG] raid1 mdadm or lvm mirror's
On Wed, Oct 17, 2007 at 10:32:02PM +1000, Matthew Hannigan wrote: On Wed, Oct 17, 2007 at 07:47:35PM +1000, Alex Samad wrote: [ ...] I have some data that I don't really care if it dies/get lost. I can't do that on a lv by lv basis with my original setup. I haven't had much experience with lvm mirrors, should I stick with my original setup or go with the new ? I think if I was to mirror on my home machine now, I would do lv mirroring for the reason you mention; you just don't need everything mirrored. but how stable is lvm mirror any one using this in production In fact I don't mirror at all at the moment; I just rsync the more valuable stuff. oh I sing as well, both on site and offsite (hate trying to find stuff or recreate it and 500Gb drives for $120...) Matt -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html signature.asc Description: Digital signature -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
Re: [SLUG] raid1 mdadm or lvm mirror's
On Thu, Oct 18, 2007 at 07:08:25AM +1000, Alex Samad wrote: but how stable is lvm mirror any one using this in production I dunno. I'm taking the fact that it's standard in major distros as an indication that it's pretty mature and reliable. I could be wrong! Matt -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
Re: [SLUG] raid1 mdadm or lvm mirror's
Matthew == Matthew Hannigan [EMAIL PROTECTED] writes: Matthew On Thu, Oct 18, 2007 at 07:08:25AM +1000, Alex Samad wrote: but how stable is lvm mirror any one using this in production Matthew I dunno. I'm taking the fact that it's standard in major Matthew distros as an indication that it's pretty mature and Matthew reliable. We've been doing a few performance measurements (as part of our research). LVM underperforms compared with the same mirroring/striping arrangement set up with md. We're still trying to work out why... (and fix it, of course). The data is still *very* preliminary, and may change as we do more experiments. Peter C -- Dr Peter Chubb http://www.gelato.unsw.edu.au peterc AT gelato.unsw.edu.au http://www.ertos.nicta.com.au ERTOS within National ICT Australia -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
