Re: [Sursound] VR and cheap headtracking in 2013...
Hi! On 12/2/13 10:33 PM, Julian Rabius wrote: Matthias, your plugins will be very appreciated. Are the IEM-Cube and Mumuth impulse responses available? They should have been released since the LAC 2013, you can ask the authors about that: http://lac.linuxaudio.org/2013/papers/60.pdf These BRIRs will be included in my plugin-suite (with compensation filters already applied). Matthias ___ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound
Re: [Sursound] VR and cheap headtracking in 2013...
On Wed, Dec 04, 2013 at 01:24:05PM +0200, Matthias Kronlachner wrote: Are the IEM-Cube and Mumuth impulse responses available? They should have been released since the LAC 2013, you can ask the authors about that: http://lac.linuxaudio.org/2013/papers/60.pdf These BRIRs will be included in my plugin-suite (with compensation filters already applied). The paper refers for download to the main KUG site, but I didn't find the measurements there. Ciao, -- FA A world of exhaustive, reliable metadata would be an utopia. It's also a pipe-dream, founded on self-delusion, nerd hubris and hysterically inflated market opportunities. (Cory Doctorow) ___ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound
Re: [Sursound] VR and cheap headtracking in 2013...
On 02/12/2013 20:33, Julian Rabius wrote: Of course, personal HRIRs are to be prefered, but up to now I use these: https://dev.qu.tu-berlin.de/projects/measurements/wiki/Impulse_Response_Measurements I came across these KU100 data: http://www.audiogroup.web.fh-koeln.de/ku100hrir.html although I have not used them, and there are none I fancy.. ___ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound
Re: [Sursound] VR and cheap headtracking in 2013...
On 02/12/2013 21:08, Andy Furniss wrote: Interesting and cheap - not so sure about the magnetometer near speakers. Less of a problem than eating the baked beans that were stowed next to the fluxgate compass sensor, coming down the North Channel one night, one would think. ___ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound
Re: [Sursound] VR and cheap headtracking in 2013...
Am Dienstag, den 03.12.2013, 19:17 + schrieb dw: I came across these KU100 data: http://www.audiogroup.web.fh-koeln.de/ku100hrir.html although I have not used them, and there are none I fancy.. There is a special fileformat used for these HRIRs, Miro - measured impulse response object, and it seems you need a matlab license to open it. I have not been able to use octave instead so far, though it seems that this might be possible with future versions of octave. On the audiogroup cologne server there is also an impressive collection of binaural and other IRs, recorded in the WDR broadcast studios. http://www.audiogroup.web.fh-koeln.de/wdr_irc.html Again, the Miro datatype is used and matlab is necessary to open the data. ___ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound
Re: [Sursound] VR and cheap headtracking in 2013...
It looks like Miro is just a specification. The data is in standard .mat files that Octave can open; the Miro dataclass is not required to access the data. -- Marc Tue, 03 Dec 2013 21:12:46 +0100, Julian Rabius rab...@t-online.de a écrit : Am Dienstag, den 03.12.2013, 19:17 + schrieb dw: I came across these KU100 data: http://www.audiogroup.web.fh-koeln.de/ku100hrir.html although I have not used them, and there are none I fancy.. There is a special fileformat used for these HRIRs, Miro - measured impulse response object, and it seems you need a matlab license to open it. I have not been able to use octave instead so far, though it seems that this might be possible with future versions of octave. On the audiogroup cologne server there is also an impressive collection of binaural and other IRs, recorded in the WDR broadcast studios. http://www.audiogroup.web.fh-koeln.de/wdr_irc.html Again, the Miro datatype is used and matlab is necessary to open the data. ___ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound ___ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound
Re: [Sursound] VR and cheap headtracking in 2013...
Can you assist by pointing to a VST or standalone decoder that will accept for example MIDI input and give us a good headphone decoding of AMB files ? There are several ways of doing head tracking that we might be able to get to work if we have the back end already done ;-) Best Regards Bo-Erik -Original Message- From: Sursound [mailto:sursound-boun...@music.vt.edu] On Behalf Of Stefan Schreiber Sent: den 1 december 2013 15:20 To: Surround Sound discussion group Subject: [Sursound] VR and cheap headtracking in 2013... Hi... FYI: http://mihosoft.eu/?p=868 http://www.durovis.com/index.html Short description: - VR system (including head-tracking) via a frame holder, lenses and any smartphone - do it yourself version of Oculus Rift. My question would be why (by now) nobody seems to be able to offer/design some HT (head-tracking) headphones, considering that you wouldn't need any displays or lenses for audio... You could glue a smartphone to your head and decode the 5.1/B format source according to your current head position/tilt. This solution ain't look good, but it will work... :-D If not, you could use one or two commercially available sensors included into some headphones... Note that any sensors would need some communication link (Bluetooth etc.) to the place where the music is actually decoded, which might be a smartphone, 5.1 receiver etc. (You also would have to include some form of battery into the headphone, to supply energy for the sensors and communication IC/antenna.) Best, Stefan Schreiber ___ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound ___ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound
Re: [Sursound] VR and cheap headtracking in 2013...
You probably don't want to control the decoder directly. Better to control a rotate unit in front of it. This would be easy to rig up in Blogue Bidule or Max/MSP with MIDI or OSC input. Some decoders, like my own VVMicVST, have the right parameters to control the direction, but I doubt any are built with real time changes in mind. I know, for example, that VVMicVST would produce nasty zipper noise if you change the azimuth too fast. On the other hand, some rotate units have either interpolation or even audio rate control inputs to smooth this out. I know the one in the Ambisonic Toolkit does, and I recently coded one up myself for a project that can do it either way. I'm not sure about B-Proc, anyone? David McGriffy VVAudio On 12/2/2013 2:47 AM, Bo-Erik Sandholm wrote: Can you assist by pointing to a VST or standalone decoder that will accept for example MIDI input and give us a good headphone decoding of AMB files ? There are several ways of doing head tracking that we might be able to get to work if we have the back end already done ;-) Best Regards Bo-Erik ___ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound
Re: [Sursound] VR and cheap headtracking in 2013...
On 12/2/13 6:41 PM, Andy Furniss wrote: David McGriffy wrote: You probably don't want to control the decoder directly. Better to control a rotate unit in front of it. This would be easy to rig up in Blogue Bidule or Max/MSP with MIDI or OSC input. I've been waiting to see if this will appear. http://www.matthiaskronlachner.com/?p=1723 and hoping it will work with - http://www.matthiaskronlachner.com/?p=624 Sorry for keeping you waiting... If you are on OSX just send me an email and I will send you a link to a beta installer. (5th order VST Plug-ins) Actually my rotation plug-in has OSC integrated (which listens exactly to the Kinect head tracking app), but with Reaper you can also route OSC messages to control plug-ins. (It's not very nice from the plug-in to have it's own communication to the outer world I would say) Although I warn you, the Kinect head tracking takes a lot of CPU power and the convolutions for the binaural decoder as well (if you choose eg. the IEM Cube or Mumuth as virtual venue). My binaural plug-in is very uneconomic in this sense. It will simply convolve every loudspeaker signal with the related binaural room impulse responses. For the late reverberation this is probably an overkill but well, it's straight forward... The presets with Kemar HRIRs are much more cheap concerning CPU but I prefer not to listen in a dead room. I recommend using something like this for head tracking which save your CPU power for real time audio: http://www.rcgroups.com/forums/showthread.php?t=1677559 And I am also waiting for headphones with integrated head tracking to appear. Hope to be able to post a download link and a link to the source repository of the ambix plug-ins soon. Matthias ___ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound
Re: [Sursound] VR and cheap headtracking in 2013...
Matthias, your plugins will be very appreciated. Are the IEM-Cube and Mumuth impulse responses available? I am successfully using the SoundScape Renderer (SSR), with headtracking through the Razor AHRS. http://spatialaudio.net/ssr/ https://github.com/ptrbrtz/razor-9dof-ahrs/wiki/Tutorial SSR works very well, under both Linux and OSX. I use it for virtual stereo monitoring, but it is possible to use a higher number of virtual speakers as well (horizontal only). I was really fascinated by the smyth realiser A8. http://www.smyth-research.com/products.html But it is expensive, has only a limited tracking angle, and, worst, a very high latency. SSR gives me the possibility to listen in realtime while recording, playing virtual instruments and so on (jack latency 2.9 ms, no xruns). Of course, personal HRIRs are to be prefered, but up to now I use these: https://dev.qu.tu-berlin.de/projects/measurements/wiki/Impulse_Response_Measurements Did anyone write (or modify) a small application to transform RAZOR AHRS measurements to OSC signals? I have tried to do so (in python), but it has not proved usable yet... Thanks to all in this list for your enthusiasm, the great work and your sharing of immense and very valuable information. This is my first post, but I have been lurking for quite a while... Julian ___ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound
Re: [Sursound] VR and cheap headtracking in 2013...
Not cheap, but the Smyth Research Realizer does do head tracking with any headphones. It also measures your HRTFs and headphone's response. I played with it at Burning Amp this year and it was quite effective at externalizing the sound from headphones. http://www.smyth-research.com/products.html On Mon, Dec 2, 2013 at 1:08 PM, Andy Furniss adf.li...@gmail.com wrote: Matthias Kronlachner wrote: On 12/2/13 6:41 PM, Andy Furniss wrote: I've been waiting to see if this will appear. http://www.matthiaskronlachner.com/?p=1723 and hoping it will work with - http://www.matthiaskronlachner.com/?p=624 Sorry for keeping you waiting... If you are on OSX just send me an email and I will send you a link to a beta installer. (5th order VST Plug-ins) NP about the waiting :-) it's good to know that the project is still alive and thanks for the offer but I am using Linux. Actually my rotation plug-in has OSC integrated (which listens exactly to the Kinect head tracking app), but with Reaper you can also route OSC messages to control plug-ins. (It's not very nice from the plug-in to have it's own communication to the outer world I would say) Sounds good, being just a home user I am not used to pro audio apps with plugins etc. Something like this would certainly make me take the plunge. Although I warn you, the Kinect head tracking takes a lot of CPU power and the convolutions for the binaural decoder as well (if you choose eg. the IEM Cube or Mumuth as virtual venue). My binaural plug-in is very uneconomic in this sense. It will simply convolve every loudspeaker signal with the related binaural room impulse responses. For the late reverberation this is probably an overkill but well, it's straight forward... The presets with Kemar HRIRs are much more cheap concerning CPU but I prefer not to listen in a dead room. Hmm, I guess I won't know about CPU without testing - though I have a quad core 3.4Ghz it is getting a bit old now. I recommend using something like this for head tracking which save your CPU power for real time audio: http://www.rcgroups.com/forums/showthread.php?t=1677559 Interesting and cheap - not so sure about the magnetometer near speakers. And I am also waiting for headphones with integrated head tracking to appear. Yea, but only if Sennheiser will do it and part exchange my current ones :-) Hope to be able to post a download link and a link to the source repository of the ambix plug-ins soon. Great, will keep a look out and thanks for this work. ___ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound -- next part -- An HTML attachment was scrubbed... URL: https://mail.music.vt.edu/mailman/private/sursound/attachments/20131202/78515745/attachment.html ___ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound
