Neil Gould wrote:
Mike Rivers wrote:
On 3/23/2013 9:41 AM, Neil Gould wrote:
The lack of noticeable delay suggests that the monitoring signal is
pre A/D.
It depends on what "noticeable" means.
Agreed. I mean it as undetectable as a phase shift or echo effect. How do
you mean it?
What I meant was: when listening with headphones and a 'live' source
simultaneously at similar volume levels (e.g. with the headphones partly
off the ears), there was no noticeable echo or phasing effect.
In the interests of science (and for the avoidance of arguments) I have
now measured the delay and found it to be 0.714 microseconds. It gives
180 degree phase shift between input and output at 700 c/s and 360
degrees at 1.4 Kc/s. This is equivalent to 8.5 inches physical
displacement between microphone and earphones.
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