Linux-audio-user February 2014

linux-audio-user@lists.linuxaudio.org

108 participants
83 discussions

by Louigi Verona

*Wrote this some time ago to the list, never got a reply. Now looking through the archives, I don't see this mail at all. I did attach a file, so maybe it was filtered. This is why I am duplicating this.* Hey fellas! I notice that no Linux samplers seem to support wav file loop points. All Windows DAWs that I have used support the format and there are a lot of samples out there with perfect loop points which is very useful. I have no idea whether this is part of the spec or not but these looppoints have been used for more than 15 years, that's for sure, since some of these sample collections have been around during tracking days. I did find something on loops here: http://www.sonicspot.com/guide/wavefiles.html But I think you, devs, know better than me anyway. I think it would be great if LMMS, samplers like Petri-Foo would support this, as this adds a lot of functionality. Many sample collections provide perfect loops and it is tiresome to have to try to remake it by hand each time, while in some software it is simply impossible at all. What do you think? ps: I can provide you with a sample example with loop points

11 years, 9 months

Re: [LAU] JACK on PicUntu devices (mini-pcs)

by Len Ovens

On Mon, May 27, 2013 2:07 am, Jeremy Jongepier wrote: > On 05/27/2013 10:55 AM, Dan MacDonald wrote: >> I'm not sure what to recommend in the way of >> deb boards with SATA but I know that the cubieboard has SATA and its not >> the only one but its one of the cheaper options. > > I've considered buying a Cubieboard but after having googled some > read/write speeds I found out you don't gain that much with the SATA > connection. Depends on the hard drive too of course. I then googled > prices for SATA drives and realized it was getting too pricey. My sense is that the reason for the extra SATA port is not for faster access, but to unload the USB port of some of it's traffic. This should make audio more reliable. It does on my atom based machine. A second separate USB port would have the same effect. (not an internal bridge) -- Len Ovens www.OvenWerks.net

11 years, 9 months

Need some programming help.

by Will Godfrey

I've been slowing working my way though Yoshimi, looking for bugs and trying to understand the code, with some success. However, I've come across something that has me completely stumped. On a modern machine if you look in the AdSynth edit window 'Detune' shows a variable number of trailing digits, where it should only show 2 after the decimal point. This is also true of all cases where a recalculated slider value is indirectly shown in an associated uneditable box. It happens nowhere else. I've seen this on 64bit dual core AMDs and on 32bit Atoms. However, on an AthlonXP the problem doesn't occur. At first I thought it might be due to different version of FLTK but having tried various releases of debian, from 'lenny' up to the current 'testing', the *only* differentiating feature I can discover is that the AthlonXP doesn't recognise the sse flag. Finally, to add to the confusion, compiling on any of the other machines, without the sse flag set, still produces the fault - I'm wondering if even without this, some math feature is still being used that causes the fault. Any help or suggestions would be gratefully welcomed! -- Will J Godfrey http://www.musically.me.uk Say you have a poem and I have a tune. Exchange them and we can both have a poem, a tune, and a song.

11 years, 9 months

Little mellow Yoshimi DX improvisation

by Lorenzo Sutton

Just a little, mellow improvisation with yoshimi DX rhodes while testing my E-MU midi-usb dongle with my ancient yamaha keyboard. No editing, just recorded directly through jack... Dedicated with admiration and appreciation to all you sleepless open source developers out there :-) http://lorenzosu.net/temp/yoshimi_dx_impro.ogg Good night, Lorenzo.

11 years, 10 months

Re: [LAU] jack + other audio

by Kjetil Matheussen

"Patrick Shirkey": > 1: use pulse audio with jack-sink - easy > But have you gotten decent latency this way? (i.e. at least less than 40ms) > 2: use the jack-alsa plugin for alsa - not so easy > Why is this not easy? It's just pasting a few lines into ~/.asoundrc, and then you're done... Pretty decent latency too. I'm pretty sure this solution is generally the best. http://jackaudio.org/routing_alsa

11 years, 10 months

APC devices for Audio

by Carlos sanchiavedraz

Hello dear all. Lately I've found this devices by APC that seem quite interesting to me given my interest and projects around Raspberry PI and Linux Audio: http://apc.io/products/rock/ http://apc.io/products/8750a/ I love this presentation as a book,, http://apc.io/products/paper/ ... and that, presenting a device in a nice and not PC-like way, is something I've been thinkinf of for a long time, but I couldn't do it myself without a lot of building and DIY. Does anybody have or tried one as it is? And with Linux? -- Carlos sanchiavedraz * Musix GNU+Linux http://www.musix.es

11 years, 10 months

raspi as midi synth

by Milan Lazecky

hi folks, i have a yamaha wx5 (midi saxophone). i was thinking to use my midi2usb cable to plug into raspberry pi which would use some fluidsynth soundfonts to synthesize music realtime. do you know about such project existing, or should i work on it from beginning? (i.e. find some rt kernel, install sw, rearrange system for no gui etc...) do you think raspberry can handle it well? thank you. milan

11 years, 10 months

jack + other audio

by Peter O'Doherty

Hi list, I'm know this has been asked a thousand times already but could someone please point me in the direction of instructions to enable non-jack applications (like vlc) to work concurrently with jack? The well-known situation is that jack "hogs" audio and makes other applications unusable. How to get around this? Many thanks, Peter -- //============================= -> Peter O'Doherty -> http://www.peterodoherty.net -> mail(a)peterodoherty.net //=============================

11 years, 10 months

compiling jack-osc?

by James Mckernon

I'm trying to compile (or otherwise obtain) the jackd utilities found at http://rd.slavepianos.org/sw/rju/ , but I don't seem to be able to. In particular, I'm interested in using the jack-osc tool to convert jack transport messages (from Ardour) to osc messages. (Incidentally, if anyone knows of another way of doing this, please let me know.) Although the sources are there, I can't figure out how to compile them - in fact I don't even know if they're in a compileable state. I tried running make and playing around with gcc, but they seem to depend on some files that aren't present there. I'm running Arch Linux, but can't find a package for them in the AUR (Arch user repository). Are these tools still current, or have they succumbed to bit rot? Does anyone know how I might be able to compile them? Thanks, J

11 years, 10 months

Exam Cheating investigation

by Ivan K

Hello LAD/LAU members: I teach introduction to western music courses at a local community college, and one thing I have to deal with is students cheating by using a smart phone during the exam. Sure, I am in the room and occasionally walk down the aisles, but these enterprising students are still often able to hide a smart phone from me. The way these smart phone cheaters are usually caught is when answering an essay question, they usually look up the topic on Wikipedia and copy word for word several sentences. On these exams, there are a few audio identifications, and recently one student did a surprising thing. The audio example was from Pierrot Lunaire, and not only did answer the question by writing down the title and composer but she ALSO WROTE DOWN the title and composer of a track by Webern which was on the original CD that I ripped the Schoenberg from. To summarize, from an mp3/ogg file that was put on-line of one track from a CD, the student was able to identify _other_ tracks from the CD that were not put on-line. How did the student do this? Here are links to the two sound files that the students had access to: https://www.dropbox.com/s/66qkorouak19gpu/07_20th-pilu_p03_15-18.mp3 https://www.dropbox.com/s/z17qoxey9ju4lei/07_20th-pilu_p03_15-18.ogg Are there some tags embedded in these files? How would I be able to see these tags myself? If there are no embedded tags, how did this student obtain this information? Thanks; Ivan

11 years, 10 months

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Linux-audio-user February 2014