On 4/23/2014 12:32 PM, Tim Sprout wrote:
How do you fix the delay between a room stereo pair and spot mics? Do
you record a spiky sound like a cowbell hit and visually align the peak?
Measure the distance between the mics with a tape measure and calculate
it? Slide the tracks and adjust by ear?
Any of the above will work. Recording a spike that reaches all the mics
is probably the most accurate method.
At what distance does this become a problem?
The critical comb filtering region, where combining mics at close to the
same level will cause raggedness in the frequency response, is roughly
0.5 to 5 milliseconds, which roughly corresponds to about 1/2 to 5 feet
difference between the source and each mic. It takes about 30
milliseconds (30 feet) before you can perceive the difference as an
echo. In between, your ear is the best guide.
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