TOPIC:

Hello, I'm coming back just to keep you posted on the progress.

I searched for information on the solution we had discussed (shifting a bit from the left lane to the right to create a phantom center lane), and found this on a French site: http: // petoindominique. fr / php / pc_reduire_stereo.php to read it in English you can use Google: translate.google.fr/?hl=fr by configuring it.

I still have a question about this way of doing things: a sound coming from the right will in this case come mainly from the right and a little from the left, but the sound coming from the left will reach the ear at the same time. left than the one on the right when it seems to me that it should arrive with a slight delay ... and the same reason for the other ear.

But I think a priori that this deadline must be very short and I hope not to disturb.

I think you are considering it wrong, overthinking things perhaps.

The bleed needs the same timing as the main speaker its coming from to ensure pure amplitude panning which is required to reduce the soundstage width by the amplitude panning effect moving the sound to virtual speaker positions. Your bleed achieves eaxctly the same thing as a mixer panpot with a mono source being spread across a stereo image. It is a well proven technique to say the least.

If you did somehow mess with the timing the amplitude panning effect would be spoilt, the virtual speaker position would be spoilt and the soundstage width reduction would be spoilt. Possibly no more than slight frequency response ripples in practice but hard to reason about without maths.

The inter-aural time difference would appear to be of the order of 500 microseconds worst case which is far too short to be audible as separate sounds, instead it has typically minor effects on the perceived frequency response. A time difference of around 40ms is required before the sounds become separate. That equates to about 12m so even if you stand on one side of your room you are still nowhere near hearing the time delay from the other side.

Thank you for the answer,

yes I think I am asking myself too many questions.