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Nagra -8db



Tone settings on Analogue tape such as Nagra are very relative.  
Nagra ATR's such as the 4.2L and 4STC have their recording bias 
pre-set either at the factory or at the rental shop.  Most sound 
mixers do not adjust the bias themselves.  The tone is pre-set 
relative to the recording bias of the Nagra.  Headroom on a Nagra is only about 
8db.
Most often in post, Analogue tape with tone recorded at -8db should be set at 
0 VU when played back.  But, be careful.  The tone on a Nagra can be 
pre-set at any level regardless of the actual recording level of the 
true sound.  The tone could be misleading.
On DAT and other digital recording formats like D2 or Digi BC, the 
recording headroom is up to 20db over 0 VU.  DAT with a -8db tone 
should be set at -8VU when played back.  This is one of many reasons 
we prefer production sound on DAT over Nagra.