OP
- Thread Starter
- #21
By the way, measuring this on the Focusrite Liquid 4Pre, Yamaha DM1000 mixer and on the Yamaha AD8HR Preamp, it seems Yamaha is labelling the "gain" with a number being the level in dBu to reach exactly -20dBFS,Nobody doing real mixing on a digital mixer will go anywhere near 0dBFS, at least not intentionally. The usual conventions dictate that there should be at least 10dB between the very highest levels likely to be encountered and 0dBFS. 20dB would be a better safety margin to aim for so I would be inclined to take whatever margin you decide on, into consideration when setting up your operating conditions for measurement.
while Focusrite use positive numbers, representing the negative of the level in dBV to reach exactly -20dBFS
Or, in other words, the negative of the level in dBu to reach -22dBFS
Example:
"-60" position Gain for Yamaha => if the input is -60dBU, the level reads -20dBFS after ADC conversion
"60" position Gain for Focusrite Liquid 4Pre => if the input is -60dBV (-58dBu), the level reads -20dBFS after ADC conversion
The bottom line is that as the Focusrite Liquid 4Pre has gain up to "80" and the Yamaha AD8HR up to "-62",
the 4Pre has an additional 16dB of gain (!)
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