[LAU] Arch Wiki Professional_audio

Ralf Mardorf ralf.mardorf at alice-dsl.net
Fri Mar 31 10:47:09 UTC 2017

On Fri, 31 Mar 2017 09:25:34 +0200, Hermann Meyer wrote:
>Am 30.03.2017 um 17:25 schrieb Ralf Mardorf:
>> On Thu, 30 Mar 2017 16:47:20 +0200, Hermann Meyer wrote:  
>>> You'll never change anything on "travel time of the sound wave in
>>> the air", so why make it complicated?  
>> If live music, theatre etc. should be your domain, you hopefully try
>> to compensate issues caused by travel time. Or am I mistaken aren't
>> there possible issues caused by travel times?
>> Regards,
>> Ralf  
>If there are, then it is related to the room / speaker positions. 
>Nothing you can change with pc-setup-tools.
>Maybe with a specialized software for that, but again, no general 
>solution could be provided. More likely you'll look for a better
>speaker position.
>But most likely is the opposite, you'll use the travel time as
>"effect" . To say, hey, this room has a nice acoustic, really great
>live atmosphere.

You are clueless, aren't you?

Have you ever heard of travel time correction?

I didn't find a good, absolutely correct, detailed explanation in
English, likely it requires more than just such a short text. However,
to prove you wrong, just talking about something you don't understand
at all, this should be enough:


"Delay In Sound Reinforcement
Sometimes at live performances, extra speakers are placed down the
walls of the auditorium.  If these speakers are not delayed, it will
appear that the sound is coming from the walls rather that from the
state.  The delay of the sound coming from the state, mixing with the
un-delayed signal coming from the speaker, can also muffle the attack
and clarity of the sound.  To prevent this from happening, side
speakers used for sound reinforcement are delayed by the number of
milliseconds equal to the number of feet that the speaker is away from
the stage.  Figure one below shows two sets of speaks on the side
wall.  The closest set is 20 feet away from the stage so the signal
sent to these speakers is delayed 20 ms.  Since the second set is 40
feet away from the stage, their signal is delayed by 40 ms." -


"Michael" described Floyd as "an idiot savant", and added, "Give him
any two numbers, and he can multiply them in his head, just like that."
Homer, testing Floyd, said, "Five times nine", and Floyd instantly
responded "Forty-five", which impressed Homer.

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