mono compatibility question

Thanks for giving such a detailed response.

The information given here will be very helpful.

I’m going to look around and do some more reading about goniometers and phase cancellation and just phase in general. I guess its easier to work out things about phase with simple waveforms like sines or triangles and more about doing things by ear with more complex sounds.

I will have to think about big speakers, car stereo, headphones, phone speakers, portable bluetooth speakers.

I have to work on everything with headphones only.

Does anyone produce music for dolby 7.1 ( 8 speakers ) or 5.1 ( 6 speakers ).

I guess its mostly for cinema so probably they dont think about mono compatibility.

Anyway, that was very interesting and helpful thanks.