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20650 discussions

[linux-audio-user] Can't get rosegarden4 to record from ALSA virmidi

by Larry Troxler

Has anyone got rosegarden to record from an ALSA virmidi port? I can't get it to work, and apparently nobody on the rosegarden list has tried it, so that so far, I have not got any answers there, probably because the developers are very busy with other things.. But I thought I'd ask here as well, because there may be some rosegarden users that aren't on their list, and I'm getting hungry to get this solved. I'm hesitant to submit a formal Rosegarden bug report just yet, because I could be misunderstanding something about the way virmidi works. In case anyone's interested, Rosegarden is a sequencer app that uses the ALSA MIDI sequencer API. What I'm trying to do is load a the virmidi device, and then aconnect 72:0 73:0 for example. Then I set up the record device in Rosegarden to record from 73:0, and set up a play track that plays on 72:0. Thus when I record, I would expect that events get recorded onto the record track, but it doesn't happen. I also can't record events to that track if I play them from PD, using the OSS compatilibilty interface, through a device that is symlinked to 72:0. However, PD itself has no problems linking the two devices together - Through PD I can play through 72:0 and have PD receive the message back through 73:0. It is entirely possible that I'm making some silly mistake, so that's why I ask here. Can anyone suggest some other test to try? Is it possible that there is a bug in ALSA where using the sequencer API doesn't work when getting events from a virmidi device? Or is it more likely a bug in Rosegarden? I already tried making sure that Rosegarden seem to be opening the correct record device, by hardwiring this in the source code. What's left next for me to try, is opening the 73:0 device in record direction only (Rosegarden I beleive is opening it in duplex mode). So, any thoughts? Is there some simpler application I could try as a sanity check, to see if my ALSA and virmidi are working? Larry Troxler

22 years, 3 months

[linux-audio-user] Newbie/Laptop/Linux/Audio

by sh＠nnon.tv

I'm fed up with expensive upgrades and a dull computer experience so I'm making the leap from Apple. I've just built a bare bones Linux box with AMD 2600+/9700Radeon/120gig HD/ CD DVD RW/ etc and crammed it into a Shuttle box. Small and runs cool. Slackware is happy on it. I need to augment my audio computer needs with a laptop. I've looked around on the archives and have not found a consensus and would appreciate some help in this area. What works with Linux and audio best on a laptop? I've been looking at IBM T30/T40 used but don't know really what to get. thanks, Shannon

22 years, 3 months

[linux-audio-user] Processor Recommendation

by Peter Groves

I'm planning on building a new machine and would like some advice. Right now I think the main application of it's "power" will be in recording/mixing in linux. People have been saying that a dual processor is something to consider, but there's currently a problem: the amd athlon's that would be at my price point (the 2600 - 2800's) have no dual processor motherboard support, and it looks like there won't be any b/c companies are just going to go straight to supporting the new 64-bit opterons (which aren't in my price range). So if anyone can comment on any of the following things, it would really help me out. Front Side Bus speed: how important is this for recording? i could just get two bargain athlon's with a slower FSB, would that work? Would any of the sound apps out there, or even linux in general, make any use of a 64 bit opteron anytime soon? (no i won't have more than 4GB of memory) Hyperthreading - the new fancy P4's have it. Does it do anything on linux? I saw some benchmarks where it really sped up video encoding (on windows), how similar to sound processing is this? In general, intel chips seem to do better in benchmarks on floating point stuff (games and video) while amd's do better on integer heavy apps (office software). I would think that sound stuff would therefore run better on intel's but lots of sound people say they prefer amd's. Any reason for this? How fast does a system really need to be before it can handle recording with practically no limits? (let's say fewer than 10 tracks at a time such as with a delta1010) thanks for any help, i'd be happy if i got responses to only a few of these questions. Peter

22 years, 3 months

[linux-audio-user] [Fwd: audio card for linux]

by Dave Phillips

Greetings: I know that the RME HDSP card is probably what Oeyvind is looking for, but I thought that perhaps some users might care to share their experiences with it. Please cc any replies to him as well the list, thanks ! Best regards, == dp

22 years, 3 months

[linux-audio-user] ALSA -> OSS mapping question for Delta 1010LT card

by Akos Maroy

I have a Delta 1010LT audio card. I have ALSA version 0.9.4 installed on a RedHat Linux 9. I want to record multiple, unrelated audio streams that overlap in time but do not necessarily stop and start at the same time. Imagine radios, each tuned to a different station, plugged in to each audio input on the audio card. I have an existing application, which uses OSS interfaces, which will do what I want if I can just configure ALSA to create a different emulated OSS sound device for each input channel on the sound card. (Or, perhaps for stereo pairs of input channels). So, is there a way to configure ALSA to do this, and if so, what is it?

22 years, 3 months

[linux-audio-user] .asoundrc and the sequencer

by rob buse

hello everyone, I'm wondering if its possible to manipulate my sequencer clients using .asoundrc ? I have my laptop with its cs46xx card which always gets installed as sequencer client 64:0. When I plug in my midiman 2x2 it gets registered as clients 72:0 and 72:1. basically, I want to either place the midiman 2x2 as client 64:0 and 64:1 on start up, or somehow use parameters in the modules.conf file to not load the cs46xx's sequencer portion (since my laptop has no midi out). I see there are some sequencer related things in the .asoundrc file, but I really can't find what they do. Any suggestions ? cheers rob _______________________________________________________ Sent through e-mol. E-mail, Anywhere, Anytime. http://www.e-mol.com

22 years, 3 months

[linux-audio-user] Re: Processor Recommendation

by Andrew Burgess

>Hyperthreading - the new fancy P4's have it. Does it do anything on >linux? I saw some benchmarks where it really sped up video encoding (on >windows), how similar to sound processing is this? Alan Cox says HT provides 0-30% speedup.

22 years, 3 months

[linux-audio-user] Hydrogen users ?

by Dave Phillips

Greetings: I'm troubleshooting some problems with the Hydrogen rhythm composer, and I wondered if anyone else on the list has been using the program. For some reason yet unclear my saved drum kits are completely garbled and crash Hydrogen when I try to load them. Has anyone else built and saved their own drum kits in Hydrogen ? Best regards, == Dave Phillips The Book Of Linux Music & Sound at http://www.nostarch.com/lms.htm The Linux Soundapps Site at http://linux-sound.org

22 years, 3 months

[linux-audio-user] newbie question about a Delta 1010LT card

by Akos Maroy

Hi, I just installed a Delta 1010LT multi-channel audio card into my PC. I'm new to multi channel cards, and have some questions. I'm sorry if these questions are dull or simple. I just installed alsa 0.9.4, as described on the page http://www.alsa-project.org/alsa-doc/doc-php/template.php3?company=Midiman&… all modules seem to load fine. I have the following questions: - mixer I can also run alsamixer and env24control, but I can't run aumix or other mixers that would use the OSS mixer interface. maybe the alsa -> OSS mixer interface is not configured properly, as: # cat /proc/asound/card0/oss_mixer VOLUME "" 0 BASS "" 0 TREBLE "" 0 SYNTH "" 0 PCM "" 0 SPEAKER "" 0 LINE "" 0 MIC "" 0 CD "" 0 IMIX "" 0 ALTPCM "" 0 RECLEV "" 0 IGAIN "" 0 OGAIN "" 0 LINE1 "" 0 LINE2 "" 0 LINE3 "" 0 DIGITAL1 "" 0 DIGITAL2 "" 0 DIGITAL3 "" 0 PHONEIN "" 0 PHONEOUT "" 0 VIDEO "" 0 RADIO "" 0 MONITOR "" 0 - accessing the multiple input channels as separate OSS devices actually the main goal of having this card is to be able to record parallelly from the separate input channels it has. recording would be done through opening and reading OSS-style /dev/dsp devices. is this possible using this card and alsa drivers? if so, how? is this related to /etc/asound.conf ? all help would be appreciated, Akos

22 years, 3 months

Re: [linux-audio-user] newbie question about a Delta 1010LT card

by Joe Dell'Orfano

This may be off your subject a bit, but I can confirm that multichannel recording works with the Delta 1010LT card with Ardour. If you run Jack, by the way, the jack patch bay will show all 10 inputs and outputs on the 1010. Again, this is probably not exactly what you want, but I thought I'd chime in! -Joe -- Joe Dell'Orfano <fullgo(a)dellorfano.net>

22 years, 3 months

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Linux-audio-user