February 26, 2023 at 3:07 pm #5005
So I’ve begun an experiment and wanted to poll the collective to get your thoughts.
The scenario is twofold:
In the first case, if you had a guitar track panned to the left and blended and a binaural track of the guitar taken from the listening position where the amp was on the left, and you phase aligned the signals, could you blend that in for a greater panning experience? Realizing that binaural effects in a stereo field lose effectiveness, the original panning track would take care of that, but when the listener went to headphones, the binaural “presence” would come to life.
Scenario 2 (Given that scenario 1 actually works)
If you didn’t have that binaural track of the guitar…could you make one by recording a playback of the guitar track in the room with it panned heavily to the left (and maybe even EQ’d and doubled/delayed for precedence effect) and then blend this new binaural track back in…similar to reamping?
All insight is appreciated
February 27, 2023 at 4:04 pm #5021Bob KatzKeymaster
How was the binaural track made? “Blending” in binaural with a multi-miked stereo mix is an art that I would like to learn myself. It’s not just “blending”… there’s a lot of necessary manipulation to make it sound convincing. I have a wonderful binaural recording I made with a dummy head in a jazz club… .but of course the balance is a bit awry… the piano is too far away and the vocal is pretty much lost. I have the full set of close mikes available to me, provided by the club owner, but have not yet had the time to investigate the tools needed to”mix in” the close mikes with specialized manipulation to end up with a convincing binaural picture. Not simple. Not simple at all.
I know that Flux SPAT can output a mix into various formats, including binaural. I also own “Virtuoso”, which can take a stereo or immersive mix originally intended for loudspeaker reproduction, and produce a convincing picture of loudspeakers or perhaps even performers in space — to be played in binaural on headphones! That tool works very well for its intended purpose…. PERHAPS it would allow me to take the close stereo piano mikes and move them to virtual positions to integrate with the soundstage that the main binaural microphone picked up.
February 27, 2023 at 4:24 pm #5023
I think that’s really the crux of the issue is how the BA (binaural) track was made.
In my first thought, during the individual instrument tracking, if we had the cabinet mics on a guitar and had the BA head in a listening position where the guitar was on the left… then the signals are more straightforward and related.
Now if I didn’t have that…would it be possible to MAKE a BA signal by playing back the guitar track, panned to the left, and use the BA mics to record the playback from a listening position where the guitar sound is on the left…sort of like reamping a track.
My goal , as crazy as it sounds, is to try to bury BA signals in the stereo mix (say for guitars, and vocals, and maybe drum overheads) that when played on headphones “comes alive” but otherwise, like most BA in stereo …the effect isn’t really noticeable.
I’ve done some preliminary trial and error and had surprisingly good results, but I’m NOT doing this with a room mic BA capture, like the Jazz club Bob mentions, but instead individual BA parts of specific instruments.
There’s a fine line between innovation and a total mess and I’m hoping I don’t look behind me and see that line 🙂
What pitfalls should I be looking for here other than phasing issues which are obvious
All insight is appreciated
February 28, 2023 at 5:05 am #5025Bob KatzKeymaster
If you re-amp to get the binaural image, then you are of course introducing the coloration of that speaker. But since guitar amp coloration is the goal, reamping could be a valid solution.
As for me, I’d like to try some binaural transformation plugins. Virtuoso can simulate loudspeaker locations in space from stereo (or immersive) mixes, including those made from panning close mikes to positions. Maybe it can do a good job with the integration of a binaural mike with spots. Feed the spots into virtuoso and mix that with the existing binaural mike. It’ll probably be a mess at first, delays and all have to be aligned as well. Have to put your ears on and work until it sounds convincing!!!!!
March 18, 2023 at 2:43 pm #5520
Using the binaural “reamping” technique described above, I’ve been getting some very interesting results (as long as the signals are phase aligned with the original track).
The binaural tracks are very bright, and in recent research, I’ve found this graph from head-acoustics and DPA. It looks like an “inverse” htrf filter used for binaural playback.
While I can see how this would take care of the extraordinary brightness in playback, will it detract from the binaural effect on headphone playback? I’ve only found this today and am away from the studio.
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