Linux-audio-user September 2010

linux-audio-user@lists.linuxaudio.org

150 participants
121 discussions

by Svend-Erik Kjær Madsen

Hi I just bought a pair of two older Roland VSR-880 to record my band during rehearse , I'm gonna use it with an analog mixer, but I would be pleased to be able to feed Ardour with some of the recordings too, but the only way to do it digital is through the R-bus which is a Roland thing, but i found this device http://www.thomann.de/gb/presonus_vfire.htm and wonder if anyone here succeeded to install the device on Linux ? Maybe I used the wrong keywords but I can't find anything about it on Google. Tanks in advantage. /Sv-e

13 years, 10 months

Re: [LAU] [Jack-Devel] Jack apps recomendation.

by Robin Gareus

Ahoy, Instead of bugging the jack-developers - this may be something for the linux-audio-users email-list (CCed) http://lists.linuxaudio.org On 09/27/10 00:58, detox.maestro(a)wp.pl wrote: > Hi. > Some time ago Jordan wrote about creating some list of good audio apps > which you can connect with jack. The problem is "good" - "good" at/for what? Otherwise there's pretty complete list at http://jackaudio.org/applications http://wiki.linuxaudio.org/apps/categories/jack > So regarding to this now I am sending this post. > So my first recomendation would be zasfx or yoshimi, AMS, qsynth and > hydrogen - but only after all of them will have proper timing handle. > And what soft-synths, samplers or sequencer you recommend to use with > jack? > It should be stable and have proper midi and timing handle. > And how about plugins and effects? > How to connect lv2/ladspa/dssi with jack? Easy, simply use a plugin-host that supports JACK. There are commandline versions (eg. dssi-host-jack) as well as GUIs. The most well known are ardour, qtractor and jack-rack. But this is not really a question for a developer's list, is it? > I'm not writing about vst/vsti because there was post about it earlier > how to use them. > Is it possible to connect soft-synth and then connect it output with > lv2/ladspa plugin input? sure. Note, however that some plugins introduce latency. > And what about sf2? > There are qsynth for example, but as you know it has also timing issue > which cause jitter. You mean fluidsynth. qsynth is just a GUI. As far as my MIDI keyboard playing & recording goes it has always been good enough. Of course there's some jitter and it's not perfect. But can you really hear it, can you measure it? There are PPL playing it live on stage. Are you sure it's not your setup? There's been a long discussion in June on LAD titled "Midi-Jitter": http://lists.linuxaudio.org/pipermail/linux-audio-dev/2010-June/thread.html > Maybe you know some synth similar to qsynth with proper timing handle? > Also AMS have timing issue - maybe do you know some similar synth like > AMS? You did mention quite a few yourself above. csound comes to mind. As for a generic list of synths: http://wiki.linuxaudio.org/apps/categories/softsynths_and_samplers > Thanks in advance. > ciao, robin

13 years, 10 months

Spurious messages in jack_lsp output

by Joel Roth

Hello all, I recently upgraded my Debian 'unstable' system (I know -- a terrible thing to do to a functioning system), including a recent version of the "jackd" package. jackd --version jackdmp 1.9.6 The package contains the utility program, jack_lsp, which I rely on and need to be able to parse. I find the STDOUT stream is peppered with what appear to be debugging messages from the JACK server. Is that purposeful or a bug? $ jack_lsp Jack: JackClient::SetupDriverSync driver sem in flush mode Jack: JackPosixSemaphore::Connect jack_sem.1000_default_lsp Jack: Already connected name = lsp Jack: Clock source : system clock via clock_gettime Jack: JackLibClient::Open name = lsp refnum = 2 system:capture_1 system:capture_2 system:playback_1 system:playback_2 Jack: jack_client_close Jack: JackClient::Close ref = 2 Jack: JackClient::Deactivate Jack: JackSocketClientChannel::Stop Jack: JackPosixThread::Kill Jack: JackClientSocket::Close Jack: JackClientSocket::Close Jack: JackPosixSemaphore::Disconnect jack_sem.1000_default_lsp Jack: JackLibClient::~JackLibClient Jack: JackShmReadWritePtr1::~JackShmReadWritePtr1 2 Jack: Succeeded in unlocking 120 byte memory area Jack: JackLibGlobals Destroy 8b67028 Jack: ~JackLibGlobals Jack: JackPosixSemaphore::Disconnect jack_sem.1000_default_system Jack: JackPosixSemaphore::Disconnect jack_sem.1000_default_freewheel Jack: no message buffer overruns Jack: JackPosixThread::Stop Jack: ThreadHandler: exit Jack: JackShmReadWritePtr::~JackShmReadWritePtr 1 Jack: Succeeded in unlocking 1012 byte memory area Jack: JackShmReadWritePtr::~JackShmReadWritePtr 0 Jack: Succeeded in unlocking 82213148 byte memory area Jack: jack_client_close res = 0 Regards, Joel -- Joel Roth

13 years, 10 months

Albums under a label recorded and/or mixed with Linux

by Carlo Ascani

Hi all, just for curiosity how many albums (if any) *under a record label* have been recorded and/or mixed with Linux? -- Carlo Ascani C programmers never die. They are just cast into void.

13 years, 10 months

boss DR5 to pc

by frederic rech

Hi list, I search a while for a solution to transfer all songs and patterns from the Boss DR5 to Linux, for using it in Rosegarden. Can't find ! Anyone have an idea ? Thanks in advance, Fred

13 years, 10 months

small devices for midi?

by Josh Lawrence

hey everyone! long, uninteresting back story: I've recently changed my residence, and have very limited space. my roland piano (rd-700sx) has extremely limited space on the front panel. it would be great/neat/fun to have a very small device that I could set on my roland that I could sequence on. some hardware options: yamaha qy100 - very small and cheap! yamaha rm1x - very capable, expensive? others? now, maybe these hardware options aren't very interesting to linux geeks, so I got to thinking that maybe, just maybe, there is a small device that supports linux that supports alsa/midi? pandora? gp32x? beagleboard? something else? of all of these options, the pandora looks *amazing*, but from what I've read you can't really get your hands on it. so how about it everyone? any recommendations? thanks list, I always appreciate your help! josh

13 years, 10 months

Re: [LAU] New workstation | DAW pc

by Kjetil S. Matheussen

rosea grammostola: > > Hi, > > Thanks for all the info so far. > I have gathered some components: > > Processor: i5 750 > Heatsink: ? > MB: Asus P7P55D > Memory: Corsair XMS3 4GB(2x2GB) PC3-10666 > HDD: 2 x Western Digital WD5000AADS (Bulk, Caviar Green) (500GB) > Case: Antec SOLO > Fan: Nexus 120mm Real Silent case fan > DVD: Lite-On iHAS124 24xDVDRW > PSU: Seasonic S12II, 380Watt, ATX > Screen: Lenovo L1951p 19" or ThinkVision L197 19inch (1440x900) Wide > Flat Panel LCD (Analog/Digital) HDCP TCO 03,MPR-II > That cabinet has the PSU placed at the top. If you want a silent case, but one which is cheaper than antec p183, maybe fractal design could be an alternative? Regarding heatsink, thermalright hr-02 looks really promising. It might not be good enough to run passively, although it is supposed to, but the fins are wide, so you could get away with using a low-pressure fan such as a noctua uln, which is extremely quiet running at 400rpm. In case you can't get hold of it yet, you could just use the one which is included with the CPU until hr-02 is in store. Also, I would buy one harddrive at 1GB instead of two at 500GB. Harddrives these days are so fast anyway, that you probably don't need to run RAID or anything for multitracking. (Even the slowest HD should be more than fast enough.) In your setup, the harddrive is also likely to make the most noise. (not because the ones you have picked is noisy, quite the contrary, but because the other parts should be quite silent)

13 years, 10 months

Most stable / best 16+ channel audio interface / mixer?

by Michał Sawicz

Hi everyone, I hope this is the best place to ask this question. I'm looking for a most stable / best value audio interface / mixer with at least 16 input channels. Until now I'm using a Phonic HelixBoard 18 FireWire (mainly on AVLinux), but it's getting less and less stable. I'm having difficulties keeping jackd running, the firewire connection breaks too often. I've verified that the same happens on Windows, so it's jack/Linux's fault. On the other hand I have had multiple issues with firewire in the past and so I'm looking for a different solution, if feasible. And so here comes the question - can anyone please advise me on what hardware do they use that is stable and useful under Linux? One very interesting technology is the Audinate Dante or other variants of networked audio, but I can't find any information about software that will work on Linux with these solutions. An alternative would be to use ADAT, but it seems a bit overkill and rather pricey solution. Unless there's some good and combination that I should look into? Also, if there's a better place to ask, please do tell. Best regards -- Michał Sawicz <michal(a)sawicz.net>

13 years, 10 months

Re: [LAU] [PlanetCCRMA] meegolem -- adding rpmfusion, fedora and planetccrma repositories to meego

by Niels Mayer

On Mon, Sep 20, 2010 at 8:40 AM, David Nielson <naptastic(a)comcast.net> wrote: >> ... After installing, I can plugin a USB keyboard (Akai LPK25), setup >> routing in qjackctl, and run qtractor (with fluidsynth dssi plugin >> synthesizer) and hear/record music. Works beautifully, even with the >> built-in audio on an acer aspireone netbook. > A close friend of mine has an Acer Aspire One and we have never managed to > get good playback quality under any conditions--not Windows, Ubuntu, or > Fedora; neither playing back MP3 or OGG files, nor synthesizing new sounds > using qsynth. No matter what settings we try, there are always audible skips > and dropouts. Do you experience this with your Aspire One? (How) Did you fix > it? I was as surprised as you were that it all worked, and wasn't glitching. Meego, IMHO, is very snappy. However, the music apps were all that was running on the netbook. (In particular, don't run a web browser like chrome while visiting a javascript-heavy site while doing audio apps -- the javascript will win :-) ). Of course, I really wasn't taxing it much... Diddling around on a little keyboard into qtractor and hearing sounds coming out of the dssi fluidsynth plugin I was using; and recording, playing back sounded ok as well. Even more surprising because qtractor was giving the message 'unable to obtain realtime scheduling RR/55" or somesuch, but qjackctl and jackd were running w/ realtime. Qjackctl was certainly indicating a much larger DSP load (50%ish) than I normally see on my desktop. However it kept up, even while recording in qtractor. (TODO: need to see if hpet timer exists and if enough extra are available for app use on atom/netbook platform as qtractor's current timing on the netbook is based on the dinosaur-era 1000Hz or the audio card timing). Similarly, qsynth also performed nicely. I'm curious to find out how something like linuxsampler dssi plugin or qsampler work on the netbook, which is one of the reasons why I installed but did not manage to test other than an initial "it's got enough libraries installed to come up" test. I also want to test out "mixxx" (mixxx 1.7.2-1 just updated on rpmfusion) as a netbook might well be a perfectly good platform for DJing, combined with a Behringer BCD3000 as control surface and 4 channel USB audio device. In general "pure Qt" apps (like qtractor) are well targeted for Meego since Meego is supposed to be Qt-based, so in theory, at least you should be sharing memory between "desktop" and apps like qtractor. (My perceived reality is that meego is moblin updated from f10 to f13 -- fundamentally based on gnome -- with Qt more as a marketing direction from merging in Nokia's Maemo: "MeeGo's UI API is based on the Qt toolkit as described in the architecture; MeeGo will also include Clutter and GTK+." ( http://meego.com/about/faq )) Meego is suprisingly snappy on the netbook, despite 1.6G atom and 1G memory. Some of it seems like its the btrfs filesystem. Intel claims meego is specially tuned for the Atom. Not sure if that's based on engineering or marketing. From reading http://www.phoronix.com/scan.php?page=article&item=meego_10_perf one might notice something about maths performance that's better than competing distros (???) and one could speculate this may be helping audio performance as well (??). > MeeGo 1.0 took its first win when it came to being the fastest at encoding an MP3 using the LAME > software. Ubuntu Netbook Remix 10.04 LTS came in third while Fedora 13 took second. > ... > MeeGo 1.0 was the fastest Linux distribution again in another test. This time it was FFmpeg > where it took just 82 seconds to encode a video file while the three other tested distributions > all took 91~92 seconds. FYI, part of the reason for adding rpmfusion repos to meego was so I could easily compile and test my first foray into Vala programming -- http://spekle.googlecode.com -- which makes heavy use of FFmpeg for performing audio decompression and FFTs. I concur with Phoronix's tests at the surprising speed at which FFmpeg does it's thing on the atom processor. As 'spekle' is vala based -- it is perfectly suited for running on meego, and vala seems like an ideal language for doing netbook applications due to its combined performance (it's basically C) and modernity. Fortunately, Vala appears to be a standard part of Meego, by virtue of being a standard part of Gnome. Niels http://nielsmayer.com

13 years, 10 months

No batch processing on Linux?

by Louigi Verona

Hey guys! Yesterday I had to convert a large number of files from flac to mp3. I thought it is an easy task, but I was surprised to see that no Linux sound editors I have installed can do batch processing. Converting by hand was not an option and I had to use a proprietary solution, Gold Wave under WINE. Am I missing something or is batch processing a feature currently unavailable on Linux Audio? -- Louigi Verona http://www.louigiverona.ru/

13 years, 10 months

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Linux-audio-user September 2010