Not that Ive seen before - simple stereo recordings Ive seen/done generally uses a stereo mic or two mics on on a line/bar close to each other pointing outwards or inwards , the mics are generally relatively close to each other and not usually two seperate mics seperated by several metres in weird positions near a target sound source - and definately not 20 mics dotted around the room in strange places close to relevant soundsources (I am not talking about a regular 3d gridlike pattern of mics here - but mics places in very irregular formations close to relevant soundsources) . The thing is a normal stereo recording will take stereo recordings from a distance - In this case I miced up close to two target soundsources and then recreate that sound source with a speaker in the same place. It works well but indeed its not perfect and of course the spatialisation of the real objects would be much more detailed and yes the directivity of the of the microphone has to be carefully considered, but also - if you think of the sound of a footstep this sound propogates in all directions in reality so its not necessarily a bad thing if a speaker has a broad directivity - they just have to be played with- Ive even considered using 3d speakers for this reason.However there are also other issues which I found. For example I wanted to get the effect of people filling a room via a door and then taking to their seats - I wanted you to be able to hear a conversation walk past you and then sit down with noone there - and I wanted many such conversations as you would hear in a church before the service began. I had many mics around the room, on seats etc but one issue was that in the real world when someone enters a door the sound only comes from the door with maybe a bit of reverberation reflection on the other side of the room - however if you have a mic placed on the other side of the room you ideally only want it to record its immediate pool of sound - you certainly dont want the room reflection coming out of that speaker because the speaker by the door will naturally get reverb from the room on playback anyway (obvioulsy you cant help recording some room reverb but this can be minimised) and you dont want the mic recording to feature the sound of someone walking in through the door on the other side of the room becuase you wouldnt hear that coming from that place in the real world. So at first when someone entered the room the mic on the other side of the room picked it up quite loudly so on playback it would sound like people were entering from both sides of the room not just the door. So it worked better using more directional mics pointed in the right direction - I think it would work better if they were hanging from the ceiling pointing downwards as well - yet to try it .
On 17 May 2013 08:46, Fabio Kaiser <faboil...@gmail.com> wrote: > Isn't what you did simple stereo recording and playback? Or, more general, > amplitude and time delay panning!? > The drawback here is the mismatch of spatial selective recording and > playback. What enter the mic from one direction leaves the loudspeaker in > all directions (assuming omni characteristic). > > Best > > Fabio > > -----Ursprüngliche Nachricht----- > Von: sursound-boun...@music.vt.edu [mailto:sursound-boun...@music.vt.edu] > Im > Auftrag von Augustine Leudar > Gesendet: Donnerstag, 16. Mai 2013 12:38 > An: Surround Sound discussion group > Betreff: [Sursound] Recreating a 3d soundfield with lots of mics..... > > Recently I did a little experiment - i was creating the illusion of a > barman > serving drinks to some people in a "snug" which is little room where ladies > off "ill repute" would have a drink in pubs in Ireland when only men > generally drank in pubs. > I did this by placing one microphone in the snug with two actors - and one > microphone on the bar and recording the scene. I then placed two speakers > in > exactly the same place the microphones had been facing the inverse > direction > (which happens to be towards the "audience"). An absurdly simple idea but > it > worked fantastically well with the banning of the barman walking over to > the > hatch and asking the people in the snug what they wanted creating very > effective spatialisation. Of course there wasnt the same height > information. > I have since experimented with recreating whole soundfields like this with > many microphones placed in 3d to record a soundfield spaced apart and then > placing the speakers in exactly the same place. It works wondefully - > recently we did a church filling up and then people taking the places in > their pews and having individual conversations (here the cocktail effect > kicks in - you can listen to an individual conversation or just hear the > general hubbub of the church). Does anyone know of others who have miced up > a 3d soundfield in this way ? I have read a couple of things but none of > them are quite the same, best, Gus > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: > < > https://mail.music.vt.edu/mailman/private/sursound/attachments/20130516/a06 > 50da1/attachment.html> > _______________________________________________ > 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 > -- 07580951119 augustine.leudar.com -------------- next part -------------- An HTML attachment was scrubbed... URL: <https://mail.music.vt.edu/mailman/private/sursound/attachments/20130517/ff6ff280/attachment.html> _______________________________________________ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound
