Re: [Sursound] old Ambisonia links -
On 2014-05-13, J�rn Nettingsmeier wrote: marc, i'd rather mirror the .amb files directly on my server than invest the time to maintain a permanent tracking seeder (which i used to do many years ago, but it kept breaking). let me know if you need the space and/or bandwidth. If you give me the permission, I could ask some Pirate Party people about establishing a tracker too. -- Jörn and I were suggesting _no_ seeds. Rather that the ability to simply download would enhance 'outreach' (and more bluntly, not be such a f-ing pain). Jörn has offered to solve the bandwidth problem ( _if_ there is one). Michael ___ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound
Re: [Sursound] old Ambisonia links -
Le Tue, 13 May 2014 16:51:49 +0200, Jörn Nettingsmeier netti...@stackingdwarves.net a écrit : marc, i'd rather mirror the .amb files directly on my server than invest the time to maintain a permanent tracking seeder (which i used to do many years ago, but it kept breaking). let me know if you need the space and/or bandwidth. best, jörn Jörn, Thanks a lot for your generous offer. Last December, Ben Bloomberg also offered hosting at MIT. So I'm thinking about a hosting model with HTTP mirrors for more than 35Gb... With the HTTP mirroring model, there could be a possibility to auto-host some files. Similarly to the BitTorrent model, the idea would be to encourage participation in the mirroring effort, and let a download manager decide what's the best source. Since there are ways to setup a hybrid system with BitTorrent and direct HTTP downloads, maybe it'd possible to benefit from both protocols, for robustness. -- Marc ___ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound
Re: [Sursound] old Ambisonia links -
Jörn, Thanks a lot for your generous offer. Last December, Ben Bloomberg also offered hosting at MIT. So I'm thinking about a hosting model with HTTP mirrors for more than 35Gb... With the HTTP mirroring model, there could be a possibility to auto-host some files. Similarly to the BitTorrent model, the idea would be to encourage participation in the mirroring effort, and let a download manager decide what's the best source. Since there are ways to setup a hybrid system with BitTorrent and direct HTTP downloads, maybe it'd possible to benefit from both protocols, for robustness. It's over ten years since I did anything like this ... but if you keep ambisonia.com and/or www.ambisonia.com at York and create downloads.ambisonia.com then there is someway to use DNS to distribute calls to downloads.ambisonia.com between MIT and Jörn (and York?). The quick and dirty way is (if you are using Apache) is not to use DNS but to set up conditional redirects in the apache config file. (Conditional on geographic origin of client and/or estimated server loads.) DNS has the advantage that it allows a list of IP addreses in suggested order, so is more robust (if one of the two/three servers is playing up). All you need is root access to the York server ;-) Do contact me direct if you want me to dig out some stuff, rather than top of the head memories ... Michael ___ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound
Re: [Sursound] old Ambisonia links -
Hi Michael. Thanks for your help. I don't want to flood the list about this topic, but here's what I would use: http://mirrorbrain.org/ -- Marc Le Wed, 14 May 2014 08:11:15 - (GMT), Michael Chapman s...@mchapman.com a écrit : Jörn, Thanks a lot for your generous offer. Last December, Ben Bloomberg also offered hosting at MIT. So I'm thinking about a hosting model with HTTP mirrors for more than 35Gb... With the HTTP mirroring model, there could be a possibility to auto-host some files. Similarly to the BitTorrent model, the idea would be to encourage participation in the mirroring effort, and let a download manager decide what's the best source. Since there are ways to setup a hybrid system with BitTorrent and direct HTTP downloads, maybe it'd possible to benefit from both protocols, for robustness. It's over ten years since I did anything like this ... but if you keep ambisonia.com and/or www.ambisonia.com at York and create downloads.ambisonia.com then there is someway to use DNS to distribute calls to downloads.ambisonia.com between MIT and Jörn (and York?). The quick and dirty way is (if you are using Apache) is not to use DNS but to set up conditional redirects in the apache config file. (Conditional on geographic origin of client and/or estimated server loads.) DNS has the advantage that it allows a list of IP addreses in suggested order, so is more robust (if one of the two/three servers is playing up). All you need is root access to the York server ;-) Do contact me direct if you want me to dig out some stuff, rather than top of the head memories ... Michael ___ 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
[Sursound] TetraMic and Jaunt VR in Time, Gizmodo and Engadget (Virtual Reality Recording System)
Jaunt VR has developed a virtual reality camera. They're using TetraMic for recording audio, decoding with headtracking for playback over headphones and speakers. For video playback they're using the Oculus Rift. http://time.com/49228/jaunt-wants-to-help-hollywood-make-virtual-reality-movies/ http://gizmodo.com/meet-the-crazy-camera-that-could-make-movies-for-the-oc-1557318674 http://www.engadget.com/2014/04/03/jaunt-vr/ Len Moskowitz (mosko...@core-sound.com) Core Sound LLC www.core-sound.com Home of TetraMic ___ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound
[Sursound] Tetra Mic (for sale)
I have a tetra mic alongside its many cables, adaptors, and accessories for sale. The mic has been used only during a few occasions and has been sitting in a secure box most of the time. My location is Montreal but I can ship to anywhere. If interested please contact me off-list. thanks, -Navid -- next part -- An HTML attachment was scrubbed... URL: https://mail.music.vt.edu/mailman/private/sursound/attachments/20140514/10de2c6c/attachment.html ___ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound
Re: [Sursound] TetraMic and Jaunt VR in Time, Gizmodo and Engadget (Virtual Reality Recording System)
Len Moskowitz wrote: Jaunt VR has developed a virtual reality camera. They're using TetraMic for recording audio, decoding with headtracking for playback over headphones and speakers. For video playback they're using the Oculus Rift. http://time.com/49228/jaunt-wants-to-help-hollywood-make-virtual-reality-movies/ http://gizmodo.com/meet-the-crazy-camera-that-could-make-movies-for-the-oc-1557318674 Citing from this link: A close-up of the 3D microphone that allows for 3D spacialized audio. If you're wearing headphones, there's actually headtracking for the Oculus to tell which direction you're looking--when you change your view, the sound mix will also change to match, in order to keep the sound in the same space. I have suggested this possibility before, for example here: http://comments.gmane.org/gmane.comp.audio.sursound/5172 (obviously thinking of some audio-only application, without any video. It was already clear that the Oculus Rift included all necessary hardware for HT audio decoding, although Oculus didn't do this in 2012 or 2013.) This suggestion led (by influence or coincidence) to some further developments, which could be followed on the sursound list: http://comments.gmane.org/gmane.comp.audio.sursound/5387 To be frank: At least two groups of people on this list have demonstrated head-tracked decoding of FOA recently and before Jaunt VR, done in a very similar fashion. I could name Hector Centeno and Bo-Erik Sandholm (Bo-Erik introduced the external HT hardware, whereas the Android app by Hector already existed), further Matthias Kronlachner at IEM Graz. If not more people... Far from complaining about this, I would welcome this coincidence or coincidence. (The VR movie people and our list colleagues use basically the same HT decoder technology, and maybe even decoding software.) Because this all shows that Ambisonics is mature enough to be used even for some very sophisticated applications, if we speak about cinematic VR demonstrations... (We are all using the power of HT decoded FOA, in VR worlds, VR movies, and maybe even for 3D audio music recordings... ;-) ) Seeing the recent and ongoing development activities in areas like UHD, Mpeg-H 3D audio aka ISO/IEC 23008-3, gaming, VR, 3D movies and now VR movies (this is not a technical term yet), it is probably a good question why surround sound/3D audio is used in so many areas, but still not for (published) music recodings. (This situation looks increasingly unbelievable . ) Anyway: Congratulations to Len and TetraMic, who are involved in these activities! Now, I have some suggestions for further improvement, to our colleagues and also Jaunt VR/TetraMic: If the reference quality for HT binaural systems is about this http://smyth-research.com/technology.html, you would still have to employ personalized HRTFs (HRIR/BRIR) data sets into your decoder. (HRIR is anechoic. BRIR includes room acoustics.) It is probably possible to calculate both HRIR and BRIR data sets from 3D scans, or even from plain photographs. (This has been done at least in the case of HRIR/HRTF data sets, derived from optical 3D scans or photographs of the torso/head/ear shapes. Probably there is still ample space to improve the existing methods to calculate HRIRs/HRTFs from optical data. For example, you could compare your calculation algorithm and corresponding real-world acoustical measurements, and follow some evolutionary improvement strategy. Matching calculation results and actual measurements closer and closer, after each algorithm generation. Just a quick idea...) To calculate some (reverbant) BRIR data set (transfer function of some listener in a room), you could maybe apply some form of acoustical raytracing. It would be far easier to calculate personalized HRIR/BRIR data sets than to measure them. (Because acoustical full-sphere measurements would require to measure hundreds or thousands of different positions, over a full or at least half 3D sphere.) Beside the suggestion to investigate the use of individual HRIRs/HRTFs, I have a direct question to Jaunt VR: What specific set of HRIRs/HRTFs (or BRIRs?) are you currently using as part of your Ambisonics -- head-tracked binaural decoder? (I would imagine that you will have tested some existing collections, and chosen some specific set according to your listening results. Because you are using data sets and probably also software of other people/parties, I believe it would be fair enough to answer this question. ) Best regards, Stefan P.S.: If this is possible, I also would be curious to hear what HT update frequency you are using for the audio decoder, and maybe to ask some other questions. http://www.engadget.com/2014/04/03/jaunt-vr/ Len Moskowitz (mosko...@core-sound.com) Core Sound LLC www.core-sound.com Home of TetraMic ___ Sursound
