[MacDV] erasing miniDV tapes

[Rauno Teravainen]

You might be right, especially if the heads are not perfectly aligned, 
the other track  might be close enough for the head  pick up the sound.  
As I said, I am just assuming (should not do that on a public forum ;-)

Rauno.

 

Brett Conlon wrote:

>I always thought that the low sound heard on audio tapes during quiet bits 
>was the heads picking up what is on the reverse side of the tape. It often 
>sounded somewhat backwards to me.
>
>Coj
>
>
>
>Rauno Teravainen <lrdomus at earthlink.net>
>
>My take on it has always been that the erase head just cannot get the 
>old pattern completely of the tape, you can hear that also on analog 
>audio cassettes, when the music is very low or a complete silence, there 
>is a faint "left-over" from the previous recording, until the higher 
>volume of the new recording "kills" it.  The "left-over" could also be 
>detected as bits on the DV, I assume, until the dynamic range of the 
>"active" signal suppresses it.  I have never researched this, just an 
>old belief coming from the analog audio era.  Don't shoot me for this, 
>just rambling.
>
>Rauno.
>  
>