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Yes, people forget different path lengths from sound source to summed 
microphones equals a comb filter.

Sports audio is a whole other thing which does not excite me.

Cheers,

Richard

On 2020-10-22 10:50 p.m., Tim Gillett wrote:
> Thanks Richard,
> 
> Re "delayed channels" here's a striking example audio example which
> just appeared in my YT watch suggestion list.
> 
> I count at least 14 deep nulls in the crowd and courtside audio.
> 
> https://youtu.be/UnwYdF8a5ws
> 
> Cheers, Tim
> 
> ----- Original Message -----
> From: "Association for Recorded Sound Discussion List"
> <[log in to unmask]>
> To:<[log in to unmask]>
> Cc:
> Sent:Thu, 22 Oct 2020 14:21:18 -0400
> Subject:Re: [ARSCLIST] Delayed Channels on Cassette Tapes
> 
>   Hi, Tim and Mickey,
> 
>   Just to fill you in on related issues, there is also azimuth scatter.
> In
>   my experience this has occurred more in Studer heads, especially
>   butterfly DIN Stereo heads. The azimuth peak for each channel is
>   different. I ended up splitting the difference and the client was
> happy,
>   but it was obvious on the 15 kHz tone on the tape. I no longer have
> that
>   head assembly!
> 
>   Cheers,
> 
>   Richard
> 
>   On 2020-10-21 7:54 p.m., Tim Gillett wrote:
>   >
>   > Less common is a stereo tape recorded with a head with gap scatter.
> 
>   --
>   Richard L. Hess email: [log in to unmask]
>   Aurora, Ontario, Canada 647 479 2800
>   http://www.richardhess.com/tape/contact.htm
>   Track Format - Speed - Equalization - Azimuth - Noise Reduction
>   Quality tape transfers -- even from hard-to-play tapes.
> 
> -------------------------
> Email sent using Optus Webmail
> 

-- 
Richard L. Hess                   email: [log in to unmask]
Aurora, Ontario, Canada                             647 479 2800
http://www.richardhess.com/tape/contact.htm
Track Format - Speed - Equalization - Azimuth - Noise Reduction
Quality tape transfers -- even from hard-to-play tapes.