They sound like very good, very plausable explanations, which are no doubt informed by previous experience of considering the same question. Thanks for the replies.
But I still don't understand something.
When simultaneous, multiple sounds are occuring at the same time from different sources, how does the speaker recreate that ? i.e. an orchestra, or a band, or any other kind of ensemble, where [i]n [/i]number of instruments are simultaneously producing different sounds, each with their own characteristics.
If the speaker tries to reproduce the sound at time point [i]x, d[/i]oes the speaker sum total the frequencies ? logically no, because that in itself would produce a sound different from the sources.
Or, does the speaker give a microsecond to reproducing each sound, thereby producing Mr. Foxen's wibbly wobbly wave ? i.e. a microsecond at one number of excursions of the cone and a further microsecond for another number of excursions.
I guess to clarify my question, how does the one speaker mechanically produce [i]n [/i]different sounds ?
Thanks again for the replies