tillkrueger wrote:Ambisonics is an amazing recording technique that, in a nutshell, uses a mic-capsule array to capture x, y, z and sound-pressure signals of sound, capturing a true 3-dimensional image of sound, allowing for decoding to anything from mono to 7.1 and beyond...as a matter of fact, you can even *move* the microphone after the fact, since it is a true 3d image of the sound environment that was captured...I guess it's somewhat similar to lightfield recording, in photography, where you can re-focus the camera after the photo was taken.
Yeah, that's the general idea. First-order Ambisonics requires four microphones. Sennheiser gave me a demo using a headset with VR glasses and binarual audio, and it was quite impressive. They'd used their own Ambisonics mic (which is a 1st order mic), and the sound field was remarkably authentic, even as I turned around.
Rakesh, that is so cool that you're dealing with that eclectic artform! what microphone are you using, and what encoder/decoder? Any experience with any of the low-cost solutions that have hit the market and the indiegogo/kickstarter scene in the past few years? I remember that when I started to collect everything necessary to do ambisonics, I gave up when the only microphone at the time would have set me back over $3000...but with today's sub-$1000 mics it seems to get achievable again, and I even saw that one indiegogo project created a little $150 capsule that claims to be able to do it.
I'm not yet, it's just in planning right now. I'm hoping to do some VR stuff using Ambisonics in the next year, and leaning toward the Rode sound field mic, since it might actually have better sound quality than Sennheiser's yet it's also quite a bit less expensive. I've been pretty pleased with the sound quality of Rode mics in general (basically, the audio version of BMD, IMO) so that's where I'm leaning.
I'm actually in pretty much the same boat as you; I didn't buy the MixPre-D 6 just for Ambisonics, I bought because I needed quality audio and the 633 was just excessive for my needs (size, features)... USB recording will be more useful for my needs than XLR outputs, and I'll be ready for when I jump into VR and Ambisonics. Otherwise I'd have gone with the MixPre-D 3 instead. Other than Ambisonics, it would have served my needs just fine.