24 September 2009
At the end of 2006 I went over to Neumann, Berlin to be shown the new range of digital microphones and initially was thinking – digital microphones, great, but…
However, I was forgetting about all the headroom that you have to allow for with analogue microphones. Headroom in the microphone pre-amplifier (and the additional noise in the analogue circuit) and the headroom you have to allow in the D/A converter. These two added together mean there is about a 25dB reduction in the s/n ratio – so, a 130dB dynamic range gets reduced, in effect, to only 105dB. That was point #1 that started me sitting up and listening.
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