Help understanding various parameters and what is achieved by tuning them?

[grischard]

The parameters to lcc_audio are {inputgain} {centergain} {endgain} {LCC_Decaygain} {LCC_Delay_in_microseconds}

I've already worked out that a larger LCC_Delay_in_microseconds makes the "stage" sound wider, and a smaller one narrower. https://news.ycombinator.com/item?id=23654578 says that Apple's cross-cancellation is "not as wide or flat as [lcc's]". Does "wide" mean that they use a shorter delay? What is "flat" in this context?

[roblkw-asu]

Width is generally about how far to the right/left the spatialization can be perceived: https://splice.com/blog/multi-channel-audio-stereo-image/

Flat is referring to the frequency response.

[ionizer999]

FWIW, I use lcc on a MacBook Pro 16inch (which has already cross cancellation) and it just sounds wonderful.

I experiment a lot with HRTFs and the sound stage is so freakin' wide with LCC that I can literally hear left + right as if it was a few meters left or right. It's absolutely amazing.

Even if the default is already sounding perfect, but I'd like to tune it some more:

I think the space between speakers is 28 cm on the MacBook Pro by default and I think I sit 40-60 cm away from them (when using it as a "lap"-top), what values would I need then?

[mattlane66]

Really glad to hear that. We talked about Apple's approach in brief here. Although, I would not recommend squaring cancelation (one on top of another), I am glad to hear it is still a pleasant experience for you. At least with LCC you can send it as an output to better speakers, which you cannot do with Apple's approach to crosstalk cancelation (an approach btw we feel is not as effective as ours).

[ionizer999]

It sounds very wonderful to add both, but I'll do some experiments with some bluetooth speakers. Besides that I only have a soundbar, though I could mis-use the rear speakers (that I can position as I want) by sending output not to FL/FR, but to Rear-L/Rear-R to see how it sounds near together. (and compare with the MacBook)

I am really intrigued by your whole approach.

LCC has become my go-to software for audio listening.