STC

IIRC, the OP was also a member in another forum where I have discussed about Ambiophonics. I don’t think he was interested in the concept then. Ambiophonics is just a method to cancel or reduce the inherent interaural error. This is something happens after the sound emerges from the speaker and reaching the ears. All sound is heard binaural. It sound binaural or 3D when the ILD, ITD and pinna frequency shaping is delivered without any errors. It is the end result perceived by the listener.

I don’t use room correction because I am not sure what is actually correcting. My room was built for 2 channel stereo. Room in room with according to the so called golden ratio dimension. But after a couple of years with it I realized it was too dull. IMO, with small room the only correction they do is reduce the RT ( bass region is apart which must be addressed and not necessarily with RC). Musical enjoyment is when you get the feel of ambience. With small room RC tend too maintain the RT low so that it is within the accepted level of agreed measurements. The good thing about our hearing is that we have the ability to filter the ambience reverbs so it doesn’t really matter. Unfortunately, being audiophiles we tend to evolve and accept what is not your natural preference eventually and some with RC would swear by them.

1992 Audio Research PH1 and current PH9 PH9 picture courtesy of AR.

Made in USA. Walker Reference Phono Amp.

Dissapointed. I chose C,B and A. But unlikely to guess which is better with A/B’ing.

Hi Archi, Done my part! Thanks for making the blind test.

“Bob Katz, (author of the classic book “Mastering Audio”) who, after hearing a demo of BACCH at the 2013 AES meeting in New York, wrote “Better sounding than stereo, better than 5.1, better than 10.2!“ Just because Bob said so it doesn’t make it true. No way a recording mastered for 5.1 or 10.2 can sound inferior to a two speaker source with XTC. See here https://ambiophonics.wordpress.com/2023/08/17/guide-to-ambiophonics-home-theater/ and here. http://www.filmaker.com/surround.htm

ssstwitter.com_1710656369315.mp4

I think this is about music sharing server. A feature which was introduced many years ago. It was never part of JRiver version earlier. Unless I am wrong. Never used it. In fact, I stopped upgrades since 25 and only recently upgraded to FW32 simply to support a wonderful media player.

Crosstalk cancellation deals with the sound waves arriving at the other ears within microseconds and when speakers are place closely it will be less than 100 μs. The earliest reflection usually within milliseconds so I am not sure how the room reflection really affects the XTC. During the early days of Ambiophonics some laptops and Amplifers didn’t work with XTC. These was observation by Ralph’s research team. I remember one particular Mac laptop and some boutique amplifers being mentioned. It could be due to the internal sound card and phase accuracy of some amplifiers. My own experience with XTC and various speakers in normal non treated rooms showed that XTC still worked so I don’t think room reflection is an issue. It can slightly render the cancellation ineffective but it should work just like how we localize real sound in a non treated room. Reflection can affect the accuracy of localization but not to the extent XTC not working with loudspeakers. Having said that, those trying speakers with the conventional 60 degrees may find that the effect more compromised that the typical 20 degrees or less placement. Usually, with such position and reflective situation, the cancellation signal now becomes a phase manipulation due to users wanting to hear the effect rather than cancel the XTC and naturally the phase effect will be audible making some track unpleasant. BACCH users are facing such issues. RACE is adjustment of delay and attenuation by user while BACCH is measurement based. My own observation, most of the values based on measurements didn’t work effectively with RACE. I don’t know about BACCH.

Chesky’s The blackest Crow released in 2019 wasn’t a binaural. While binaural is capable of capturing the scene exactly like how you heard them in situ, it will not be the same for different users. If you are the lucky ones without too sensitive direction finding ears of individuals then you get the realistic 3 dimensional sound and that too when used headphones. Choeueri says only 30% of people can perceive 3D with binaural. Chesky was convinced by Choueiri to do the binaural recordings with the offer of the correction filter for the B&K mics and dummy head. This was perhaps the early stages of BACCH 3D to be developed which supposed to be sold by Chesky. In a way, it was a great strategy by Choueri because you now have a recordings that’s made exactly how the playback system would interprete them as all the cues already known when designing of the correction filter where that information can be incorporated for the crosstalk cancellation of loudspeaker playback. But along the way, Chesky started using Neumann K100 dummy head which came with its own correction filter which was meant for loudspeakers playback also. I think that too was dropped as now reference to binaural + in the Chesky record labels no longer lists them. I understand the technical reasons why binaural + was dropped but just curious of the move to a new label by Chesky himself instead of releasing the new records under the well known and loved Audiophile label, i.e., Chesky Records?

That’s correct. One mastered for headphones and another loudspeakers.

@Archimago wrote in his blog about David Chesky new label company called The Audiophile Society. Is DC finally admitting that you cannot have one format that can be equally best for both? https://positive-feedback.com/interviews/interview-with-david-chesky-on-music-and-his-new-venture-the-audiophile-society/ This is an old news but I can’t find it being mentioned here. Please delete or merge if this a duplication.

Howard Kneller is one lucky guy because he was the one the last few who got a chance to visit Ralph before its closure. Now, Kneller is using BACCH SP which was setup by Choueiri himself. I am just posting the listening take of his of the two systems. You can read the full article from the links. I hope Soundpimp and HomeAudioFidelity could get him review his. I am keen to hear about coloration complaint. BACCH SP “I eagerly turned to my collection of electronic music. Here, as with recordings of acoustic instruments, the BACCH-SP adio reproduced aural images with remarkable solidity and depth, those images now appearing far from my speakers, and with greater apparent space between synths. In any track on Daft Punk’s Random Access Memories (16/44.1 FLAC, Columbia), electronic sounds danced around robotic, auto-tuned voices, spanning the soundstage with a palpability that made every other system’s reproduction of them seem diffuse, lacking in air, and two-dimensional. Low-frequency pulses radiated far along the room’s sidewalls.” Ambiophonics “Palpable 3D voices and instrumental sounds moved within a 360-degree radius of the listening position. When called for by the recording, those sounds sometimes seemed to be only inches from my ear. Further, the soundstage extended well beyond both the walls and speakers to an extent simply not possible with traditional stereo playback systems. What was also striking was the way in which the system recreated hall ambience and reverberation. Traditional systems simply cannot as effectively recreate the room or venue in which the recording was made -- and the difference is not subtle…..The demo indicated that Ambiophonics is much more effective and operationally linear than is Carver’s Sonic Holography, which I have also auditioned. I’ve also heard numerous high-end multichannel systems, all of which couldn’t hold a candle to what we heard. Furthermore, Ambiophonics’ cost-to-performance ratio is through the roof. Yes, 24 channels of audio should be highly immersive. “ I have skipped the binaural recordings review. https://www.soundstageultra.com/index.php/equipment-menu/913-theoretica-applied-physics-bacch-sp-adio-3d-sound-processor https://www.soundstageglobal.com/index.php/blogging-on-audio/201-howard-kneller/858-a-day-with-ralph-glasgal-founder-of-the-ambiophonics-institute

Ok. Done! Carry on bs others who believe you.