Difference between analog pickups and digital pickups
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If the hardware part of a pickup does not include a clock circuit, the three parts of the memory and digital signal processor are definitely not digital pickups. The general analog pickup has only two parts, one is a microphone preamplifier circuit, and the other is a filter composed of operational amplifiers.
At present, the market mainly adopts several methods such as increasing the low-frequency cut-off frequency, compressing and expanding, and determining the size of the compression band of the filter through the energy of the sound. So the noise of several analog pickups on the market, known as digital pickups, sounds a bit smaller, but obviously the reason why the sound is so sharp is that the low-frequency cutoff frequency is thought to increase.
Digital microphones can eliminate echo and environmental noise while ensuring that speech is not lost. One of the easiest ways to judge digital pickups and analog pickups is to generate the following noises in a noisy environment or playing a noise source: white noise, single tone, etc. If the analog pickup is used, the size of the recorded sound will be It stays the same; digital microphones, on the other hand, recognize noise and suppress it in 1 to 2 seconds. Other methods of recognizing digital pickups include: playing the voice of a person with one speaker, and talking with the other person at the same distance. The pickup with the echo suppression function will pick up the voice of the person and the sound of the speaker will be eliminated.