3D sound from the ordinary stereo using Ambiophonics method

My audiophile journey to achieve perfection in playback. You don't need expensive equipment for that!


Apologies to all previous commentators. During the edit, I lost the comment section. Hopefully, this will be more reliable.

20 Jan 2020 - Taking the project to the next stage to see how well crosstalk cancellation can work for speakers placed 60 degrees.  I am going to use Sharp speakers to work with the different crosstalk for conventional speakers placement.

First demo of crosstalk cancelled with Sharp speakers. Compare them with my main system. More about this system can be found at www.ambiophonics.org 

Updated on 31 December 2019.  

Finally manged to squeeze as many channels as possible for convolution with Reaper. Current setup is using i9-9900K CPU and already at 82% for the following video sound. I am not sure if further development is possible with Reaper as it seems reaching the limits. Project loading is now taking up to a minute to load even with the i9. Total speakers are 32.1. 

My own crosstalk cancellation has been perfected and works well across different kind of recording. It works well with panned stereo sound with correct soundstage.

Updated on 15 Sept 2019. I have further refined my own crosstalk cancellation method. The new XTC can also work with your standard stereo setup and I will be posting the files to be used with your existing files. Meanwhile, this is my latest and likely my final version of the XTC sample. I have also added a new video explaining the virtual concert hall concept using additional speakers. The two videos follows:-

Updated on 10 Sept 2019: Here is an example of how the standard stereo playback could not retrieve the minute timing difference from a recording. In the new video, you can compare the original sound and sound with cross-talk cancellation for a typical 60 degrees speakers setup. 

If you would like to have your reference recording sample, please email me, and I will send you the files for you to conduct your the blind tests. You will perceive headphones like separation with this video. However, the best effect still requires a different cross-talk cancellation where I need your speakers' distance for perfection and binaural like 3D sound. The next samples and hopefully the final version will follow in mid-September 2019.

Ambiophonics method guarantees to improve any standard stereo playback to sound as natural and more detailed than any other audiophile stereo system. Here is a video where I recorded the best of 2019 KLIAV Show and compared them with my system. You can make A/B comparisons in them. Ideally, use headphones for listening since the recordings were made using Roland CS10-EM microphones.

Edit (10 Sept 2019): I have found a more robust way to make the cancellation which sounds much better than in the video below. I will update the video below to reflect the newer version of the crosstalk where the tonal balance is far more accurate than all the rest of the videos. I would appreciate audiophiles and recording engineers would listen to the sample in their system and provide feedback for further improvement. 

Sounstage! Review of Ambiophonics Institute's founder Ralph Glasgal's system.


I have also heard numerous high-end, multichannel systems, all of which couldn’t hold a candle to what we heard.- Howard Kneller (https://www.soundstageglobal.com/index.php/blogging-on-audio/201-howard-kneller/858-a-day-with-ralph-glasgal-founder-of-the-ambiophonics-institute)

Visitors' impression of my system.


Kind words of  Sharil who is also a reviewer of audio equipment.  Unfortunately, it did not get into one of his audio sites.   Here is one mini review of system by one of the the few reviewers in my country. You may also find others comments in the forum.


Quoting verbatim  "After a a few months of chit chat over Whatsapp, I finally found time to visit STC's den to experience first hand what ambiophonics sounds like. Spent about 3 hours or so experiencing various musical genre and also a few 'settings'.Ir was 3 dimensional experience where music just envelopes around you in a very reliastic manner. Layer bu layer was of the music was exposed in such detail. The drum rolls on track like Black Magic Woman was presented in a manner that I could actually imagine how the drum set was configured. The soundstage was full but at the same time, the vocal was set smack in the middle and did not loose any prowesness. Bass however, was little shy to my preference. It was extended and not thud thumping bass. But I can do with a little bit more of a dive in the lower frequency.I can see why (but I dont understand why) audiophiles can reject this ambiophonics idea but experience it and let your emotion or hearing decide it. I certainly enjoyed it and if I ever have my own hifi room back, I may look into ambiophonics.Thanks STC for the demo and also the murtabak kambing hehehe.



Many thanks to STC for the warm hospitality, it was truly an evening which had me intimately embraced by virtue of the achievements of his Ambiophonics!
I couldn't visualise the abilities of such setup with speakers apart for <2feet but true enough, I have been convinced of being transported directly to the music venue be it studio recording or live. In very a quick manner, I may humbly opine that my stereophonics (as I have barely achieved) could churn out/reproduce imaging, soundstaging and even soundscape extension into listening room to mislead me to feel that I have been transported to the music venue while ambiophonics goes straight to have directly sent me to the music venue!!!  Being last night a joyous session with few long known friends (no one is old though long known), it wasn't conducive for knowing more about ambiophonics let alone music appreciation. Mr STC, I will knock at your doorstep again and I assume the invitation without any right of refusal huh!

Kong Seng Chee 

Hi-fi is fun. Why else are we in it?  After hearing how Mr. Koo enthused over Mr. Chelvam's set-up, I decided to check it out. Ambiophonic did deliver a convincing portrayal of musical reality. This is not to be confused with live music but it certainly can thrill. Impressive. I don't know whether you'll ever get used to it. You not only will amaze yourself, but will be musically rewarded. The ambiophonic player is in public domain. My suggestion is simply to audition it. Now I can relate to Koo's enthusiastic endorsement. Let me not forget to thank Mr. Chelvam also. Ambiophonic is fun. Aren't we supposed to have fun?


I had a listen to STC's ambiophonics recently. Have to say that it was very, very impressive. The soundstage, the depht were amazing. Need to learn more on this. Would recommend it to everyone to experience. Salute you STC!

Pick your favourite classical recording, place your speakers closer so that it is around 20 degrees or less. Place a divider in between the speaker extending all the way to your face. It is easier to experiment this with small speakers with PC. In my case, I was using a mattress with my main system during my early experimentation. I knew about Ambio in early 2000s but did not fully implemented them because  being a a hardcore audiophile, I simply refused to use any form of DSP. It was only in 2011, after attempting everything to recreate lifelike playback with stereo, I reconsidered the ambiophonics DSP . It was a long lonely journey. I stumbled a lot and alone in this attempt. Ralph Glasgal was always there to guide for more than 6 years with hundreds if not thousands of email exchanges between us. Even then, the transition wasn't easy as I erred in the proper method of the implementation. 

There are two types of recordings that we are familiar with. One is the regular stereo, and the other one is the binaural recordings where all the localization cues are captured in the recordings. Unfortunately, binaural recordings can only be heard with headphones to perceive the full effect of natural sound. A binaural recording will not reproduce the localization cue correctly when played over the loudspeakers and will sound just like ordinary stereo recordings due to crosstalk. In order to retrieve the localization cues that already have been embedded in the recordings, the crosstalk error needs to be cancelled. The easiest way to understand the principle behind the crosstalk cancellation is prevent the sound from the left/right speaker reaching the right/left ear. AND, the easiest way to experiment this effect is to put a divider between the speakers reaching right up to your face. The 3D sound will emerge when you could isolate the opposing speakers sound reaching the ear.

This is also the reason why binaural recordings can work with headphones only. I use Ambiophonics method to retrieve the hidden cues in stereo recordings so that they would sound like binaural recordings when played over the loudspeakers. The sound-stage will increase to about 140 degrees or even more. You will hear more depth, separation, and natural sound. There is a research centre called Ambiophonics Institute where you can experience the 3D sound from the ordinary stereo recordings. It is open to public and serves as a research centre for academicians and researchers. This can be implemented for free or with simple plugins that are available under various names sold by third parties under different names. You may find more information at Ambiophonics website.

Ambiophonics method is a true 3 Dimensional sound with existing stereo sound. None of the videos here represent the actual 3D sound as all true ordinary stereo setup cannot reproduce the effect. Just like it is impossible to represent 3D TV image with 2D TV. Experiment real 3D sound to understand the difference between stereo and Ambiophonics. Ideally, use headphones to listen to my videos. The best way to experiment 3D sound is to implement them in your system. If you are keen to learn more, I will send you a preprocessed music that you can play in your main system. The only catch is - the speakers should be moved about 2/3 closer to each other so that it will form a 20-degree triangle. It may be mind-boggling to you that narrower speakers spread can produce a 140 degrees soundstage but that 's the real stage in a typical classical recordings that no stereo system could reproduce accurately.

To comment go to the bottom of the page.

RACE Delay and Attenuation Calculator

Please contact for an excel sheet calculator (as shown below) where you can use to find the delay and attenuation values for the Ambiophonics RACE plugin. The values are just a suggestion and should be varied according to your system for fine tuning. It is strongly suggested that you samples from Linn, 2L Linberg or Chesky during the initial setup so that you can familiarize with the delay and attenuating. 


7 Feb 2020. With the help of speakers set at 60 degrees I managed to match the tonal accuracy. It is hard to use the headphones recording to match but so far listening to the main speakers and headphones gives a rough guidance to the tonal correctness for proper crosstalk cancellation. The video below was recorded on 7 Feb 2020.

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