Having looked at how microphones are supposed to work, here we see that what happens in practice isn’t quite the same because the ideal and the actual are somewhat different.
There are two approaches to digital filtering. One is to implement the impulse response directly. The other is to use recursion. Here we look at the direct implementation.
The variable directivity microphone is very popular for studio work. What goes on inside is very clever and not widely appreciated.
Digital filters are ubiquitous. That has happened because they have significant advantages over the technology they widely replaced.
Sitting at home watching the Olympics 400m Women’s hurdles final live on NBC’s 4K HDR channel, home audiences were captivated by the sweat and effort displayed on screen with immersive sound of the runners’ feet hitting the track. Viewers thousands of miles away could be excused for thinking they had the best seat in the Japan National Stadium. The live 4K HDR broadcast of NBC’s primetime show throughout the Games were an extrasensory experience unlike any previous Olympics telecasts.
Though mostly a publicity stunt, Major League Baseball’s Field of Dreams Game live telecast on August 12th proved to be a hit for everyone involved—including the Fox Sports team and production company Game Creek Video—tasked with putting it on.
Most microphones need a diaphragm in order to follow some aspect of the air motion that carries the sound.
Previously a basic record/play system using a hard drive was considered. This relied on a table linking time codes in the recording with physical addresses so that the drive would access audio data blocks in the right sequence slightly ahead of when they were needed. In that way a time base corrector could present the samples in an unbroken sequence at the correct sampling rate to a DAC. The mechanical timescale of a legacy medium such as tape or film has been replaced by a logical timescale.