Charles Lawson wrote:

>[log in to unmask] writes:
>  
>
>>Interestingly, the ELP Laser Turntable had one of the flattest
>>frequency responses I'd ever measured.  Far flatter than any 
>>electromechanical cartridge, which is why I think the sound 
>>(harmonics, timbre) of the ELP Laser Turntable is quite accurate.  
>>However, there are other compromises with the Laser Turntable 
>>(like low signal-to-noise ratio) - nothing is perfect.
>>    
>>
>
>I have found this to be true, as well.  My best disc transfers use the ELP
>with custom filters to reproduce the RIAA (or other) curve.  The CD vs.
>digitally-mastered LP restoration comparisons are very telling.  On
>occasion, because the ELP is so flat (especially down low), I am forced to
>use a high-pass filter on the final file to minimize rumble from the
>*cutting* unit.
>
>  
>
>>Sadly, master tapes sometimes go missing and a mint LP may
>>be the best that's available.
>>    
>>
>
>Yes.  Also, master tapes can simply degrade to the point that the original
>LP sounds better than the digital transfer of a master tape would.  Sad,
>but true.  There are numerous examples in print right now.
>
>--
>Charles Lawson <[log in to unmask]>
>Professional Audio for CD, DVD, Broadcast & Internet
>  
>
I'm curious to know how master tapes 'deteriorate' Is it in the physical 
carrier or in the magnetic signal? 

Mike Gray