Linux-audio-user September 2008

linux-audio-user@lists.linuxaudio.org

124 participants
125 discussions

Re: [LAU] loop speeding in sample level accuracy

by Kjetil S. Matheussen

> > libresample outputs the exact number of frames > > (http://www.mega-nerd.com/SRC/api_simple.html), but > > unfortunately the included command line app, > > sndfile-resample, only takes a rate/amount argument. > > This looks interesting. But it seems that it needs the ratio also > (according to the api documentation) and takes in *maximum* number of > frames. Which probably means that it might leave some frames unused or > trim couple out. This is quite interesting library anyways as it uses You are right! Sorry for giving you false expectations. *maximum*, right, got it. :-)

16 years, 12 months

Finally build 2.6.26 that works, more

by David Baron

Second bootup did produce ide1 problem, once again. Could it be that the presence of kqemu or vboxdrv modules effected this? Probably not because previous builds got this problem before I ever tried to build them. I also got an error from isapnp errors references source code line numbers that were not in the logs or dmesg. Possibly relating the the above modules. However, the errors seemed to early in the bootup sequence to be from these. Anyway, the proftpd problem is from "capabilities". My older kernel does not use them but uses realtime.lsm instead (2.6.26 cannot).

16 years, 12 months

Linux Based Guitar fx / midi controller

by Nathanael Anderson

I've seen talk on the list before of people throwing around the idea of a linux based guitar, but haven't heard mention of a linux based stompbox controller. I just ordered what I think will make the perfect stompbox case from http://www.surplussales.com/Cab-RacksHardware/encl_2.html, they have a 12" x 24" keyboard enclosure with a slant on it, which is very similar to the shape of a standard fully featured fx petal. my plans are to put a x86 based board in it that'll easily handle jack, rakarrak, sooperlooper, and some ladspa effects. build midi in/through/out ports in to it and a 16 char lcd, some stompbox functions that'll be mapped to midi commands. i'll probably build a 15" lcd into a portable case I have so I can track loop status of sooperloop easily, maybe even go with a touchscreen. I also use a roland gr-20 guitar synth, which is midi equiped. Just throwing this out for feedback for now, I hope to hear of some other people that have done similar things. wirelessdreamer

16 years, 12 months

Finally build 2.6.26 that works

by David Baron

2.6.26.5 with the rt9 real-time patch. No problems with the IDE1 line this time around (previous ones killed DMA, 32-bit access, etc, a rendered the disk temporary unreadable to BIOS!! on reboot). Now to try to use the thing. Build kqemu, vboxdrv, squashfs, no sweat. Nvidia .... always a problem, it seems. Neither nvidia's nor debian's legacy driver (for mx400 cards) will compile. Debian's (where I had the sources and could play a bit) complains about an implicit definition of __SEMAPHORE_INITIALIZER. This is inside a #define that stuffs a mutex structure. I tried breaking this into a function and a #define but the constant is the problem, not how it was being used. Any ideas? Two more caveats: The patch does not append -rt to the kernel name (.config indicates the patch was indeed applied OK). Not very important. Got this on bootup: Sep 19 09:39:46 d_baron kernel: warning: `proftpd' uses 32-bit capabilities (legacy support in use) This could be important! The current kernel did not kill 32-bit access(??). Any ideas?

16 years, 12 months

loop speeding in sample level accuracy

by Jari Suominen

Hello, I'm trying to search a program (with no success) that could used for speeding up an audio file to a certain length. I mean, I would have a audio file that has 40000 samples, and I would need it to be 40010. And the pitch of the file can/should change. All speed change stuff that I have found will take semitones/cents/procents as a input parameter. I would wan't to only input the exact length (in samples) that I need. My purpose is basically make bunch of files that are loopable and have equal length with each other. Does this thing exist or do I have to make it myself? Thanks! ..j

17 years

clicking noise in all audio programswith new linux user

by un records

I am a new ubuntu user who is trying to optimize my system to run ardour and audacity. It's a dell d630 laptop. I have installed both programs and Jack, but there is a constant clicking noise whenever i open any audio program including jack. I think it has something to do with the latency, but i've tried all settings and the clicking persists. I do not have programming experience. Is there any advice you can give on how to set up my system. Thanks.

17 years

Re: [LAU] clicking noise in all audio programswith new linux user

by Norval Watson

"I am a new ubuntu user who is trying to optimize my system to run ardour and audacity. It's a dell d630 laptop. I have installed both programs and Jack, but there is a constant clicking noise whenever i open any audio program including jack. I think it has something to do with the latency, but i've tried all settings and the clicking persists. I do not have programming experience. Is there any advice you can give on how to set up my system." If you don't have a realtime kernel you need to get one. UbuntuStudio is probably a good place to start. Hope this helps Norv Make the switch to the world's best email. Get Yahoo!7 Mail! http://au.yahoo.com/y7mail

17 years

Enjoyment

by alex stone

I thought i'd add a quick note here, from the perspective of a classical music writer, as to the success of mostly latest builds of various tools i use. A big part of frustrating challenges with a former life in win/mac has been the general lack of resource for ports, channels, etc.. For orchestral writing, we're dealing in large numbers that are often not even thought of, or within the mindset of commercial developers. Step in Linux, and those that know me will also be aware of my now ten months worth of enthusiasm and determination to take advantage of the new perspective that linux and it's audio tools offers. So, the setup, one of several i have as templates. UbuntuStudio Hardy. I have this in 64 and 32bit boots, and it's my modest experience that leads me to the 64bit version as an all round better option. It seems to run better. Jackdbus. Frankly, this rocks. I'm probably about a month behind the latest updates, but, well, if it ain't broke.... Jack, imho, is the difference that puts linux audio as a viable writing and recording environment ahead of the rest. I've had this opinion since the beginning of my linux journey, and it's become even more certain as my knowledge and usage grows. Linuxsampler This has been a big part of my linux life, and that's not going to change. As an orchestral writer, just the process of setting up a full orchestra template is a time consuming task, and LS streamlines that, and reduces the level of donkey work. And it performs well, in a stable fashion, and responsive to all sorts of pressures. The new features only enhance what is the core of 'parchment studios', and frankly, i'd be lost without it. Patchage, Ingen. Yesterday i spent the day reinstalling the LAD repository, and associated dependencies, to enable LV2 plugin usage. (Redland 1.0.8 isn't in ubuntu repos yet, so installed from latest source) Once up and running, this rocks too, and importantly, no xruns, no glitches, etc. Dave Drobilla knows i'm a bit of a fan of Patchage, but Ingen is just as powerful, and a delight to work with. (The new calf lv2 plugins work well, if anyone's interested.) I tried installing packages when i first looked at this, and with my meagre knowledge, had a few interesting moments, but installing as a complete 'set' works, and with the Redland update, install and parameter setting was easy. Most important for me here, the usage is intuitive. I look forward to the further integration of Jack, Alsa, Lash, Patchage in the future. Rosegarden. For all the challenges going on at the moment with the QT4 build, RG continues to mature, and for me provides an essential part of the writing process. I'm an enthusiastic keystroke user, as i hate the bloody mouse, and RG provides nearly all of the tools to input as purely KS process. But it's also stable, runs well, doesn't cough with the weight of midi data i throw at it, and just keeps going, all day, without problems. Ardour2 Again, stable, runs all day, seamless interaction with jack, RG, etc... The recent inclusion of full screen region zoom has helped further. I've been lauding the programme where ever possible for good reason, as Ardour, like it's counterparts here, keeps going, all day, without crashing, or the tuxical equivalent of the BSOD. Jconv Might seem a bit curious that this little command line progamme sits in amongst the 'heavyweights', but jconv, imho, is a heavyweight in it's own right, and since Dave Griffiths gave me the heads up on this app, it's been in the project as a default. It doesn't chew a lot of resource, and doesn't click or cough when under the pump. I ask here Fons, that you consider jconv, for future consideration, as an LV2 plugin. Inside of Ingen, i can see Jconv a powerful addition to the armoury. (And i say this from the point of view of an enthusiastic and ongoing user.) Musescore. Another essential part of my process, especially for laying out quick drafts on manuscript. I look forward to seeing this app go further, but it't highly usuable now, and i do indeed use it regularly. (I still enjoy the look and feel of parchment, call me old fashioned.) Aeolus This one's a definite keeper, and a default part of my particular setup. Great sound, and extremely versatile. Extremely friendly on resource, and big sound for those Wagnerian moments, as well as subtle for gentler compositional muse. This is a bit of a watercooler moment for me, and i apologise if there's no real constructive content in here, but i've got a lot of music written recently, and in a moment of reflection, i realised how enjoyable it's been not having to constantly readjust, or revive, twitchy apps, that don't do what they say on the tin. All of the above programmes do, and that's a bottom line for me. Among all you 'rockers', i feel like a bit of a odd man out, and appreciate my requirements are quite a bit different, on occasion. :) , but we have a common goal in more writing, and less tweaking or fixing. So thanks to you all. I know and read you fellas get involved in the mechanics of app progress, at a level beyond me. But from an ordinary user's perspective, i've never found the writing process more enjoyable. I also understand you're constantly improving, updating, questioning, and discussing your work, often enthusiastically and determinedly, but from the other side of the fence, the benefits are apparent, and profound to chaps like me. I look foward to seeing what you come up with next. (Ardour3, RG QT4, LS plugin and new engine development, further acceptance and development of LV2, a real and viable opensource sample format, etc....) I will bluntly defy anyone who dares to suggest that linux audio isn't up to a robust full time challenge as a viable, and in many cases, better alternative to the commercial apps/distros. With a bit of effort on the part of the user (and maybe this is the real difference), the rewards are formidable, and enjoyable. And if a potential new user makes a decision on whether to take on linux, based purely on appearance, well, to be frank, i've kissed a few slightly less attractive women in my time, and their performance hasn't suffered at all. My regards, and continued appreciation of the efforts you make, for our benefit, Alex Stone. p.s. It's Dave Griffiths fault i got mixed up in Linux in the first place, so blame him. Thanks Dave. :) , it's been more than worth it.

17 years

Re: [LAU] loop speeding in sample level accuracy

by Kjetil S. Matheussen

Jari Suominen: > > Hello, > > I'm trying to search a program (with no success) that could used for > speeding up an audio file to a certain length. I mean, I would have a > audio file that has 40000 samples, and I would need it to be 40010. And > the pitch of the file can/should change. All speed change stuff that I > have found will take semitones/cents/procents as a input parameter. I > would wan't to only input the exact length (in samples) that I need. > > My purpose is basically make bunch of files that are loopable and have > equal length with each other. > > Does this thing exist or do I have to make it myself? > libresample outputs the exact number of frames (http://www.mega-nerd.com/SRC/api_simple.html), but unfortunately the included command line app, sndfile-resample, only takes a rate/amount argument. However, it's probably just a one-liner patch to modify the source for sndfile-resample to take exact number of frames instead, so that's what I would do.

17 years

Wireless Midi Controller / Linux Compatible 'Professional' Sound Card

by Miguel Morales

Hi guys, I have a couple of questions regarding new hardware that I want to purchase. Can anyone recommend a good wireless midi controller board. It can be USB or MIDI and doesn't have to be compatible with Linux (though preferably it should) I just want a few knobs, buttons, sliders. Nothing too fancy. Can anyone point me to a good recording sound card for Linux. I have outused my cheap $15 sound card. Preferably something with multi-channels, low-latency, and a nice front panel interface (or external interface so I don't have to plug things in/out though the back.) I would like it to take 1/4' audio plugs as input. No need for wireless audio. On my windows DAW I have a Sound Blaster X-Fi. I heard there are beta drivers for this card for Linux. Has anyone tried them? I may just get a new windows sound card and put the X-Fi one on my Linux box if it's stable enough. Thanks in advance! Miguel Morales -- The Revolting X Software/Music Production: http://diastrofunk.com

17 years

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Linux-audio-user September 2008