hi guys.
first, thanks for a great forum, i've been lurking for a while.
i have what i believe is a more advanced question, and one that guysonic might be able to answer.
I recently did a 24/96/wav recording of a passing train using the pcm-m10, with external microphones placed very close to the tracks. The mics were Core Sound binaurals and had their own 9V power supply. The nature of the recording necessitated low sensitivity and level of 2 or so. It peaked to -6dB so that was fine.
When I opened the recording in a wave editor, I was interested to see what the quietest level of recorded sound was. Zooming in quite a bit I saw that there's significant quantisation taking place at -65dB (FS). This is roughly in line with the
findings on Avisoft Bioacoustics on dynamic range but in a roundabout way?
I wonder not only what that means for bit-depth in recording, but also what the reason for this could be? The input level control is analog to my awareness?I know I shouldn't expect a machine of this caliber to handle -65dB in outstanding manner, but still.. any ideas? The digital limiter was engaged on this. (that's another 12dB of protection, and I know it's 20dB on the D50). Could that be related?
feel free to throw technical / engineering terms at me.
thanks in advance.