Microphone Techniques and Signal Processing

These flashcards cover key concepts related to microphone techniques, audio signal processing, and the characteristics of various microphone types.

What is the purpose of a tie line in audio recording?

connects balanced line levels signal to the patch bay.

What is fold back in the context of audio recording?

It sends a part of the recording signal back to the artists with different mix levels.

What type of microphone configuration a mid-side?

the cardioid mic captures the main sound while the figure of 8 captures ambient sound.

What is the Mid-side formula?

M = L + R and S = L - R.

What does near coincident mic placement refer to?

mic placement, like ORTF, uses two cardioid mics positioned 17cm apart from human ears.

What is the significance of the 3 to 1 rule in microphone placement?

prevents unwanted noise by ensuring that the distance between mics is three times greater than the distance to the source.

What does DI stand for in audio recording?

direct injection, which turns a non-balanced signal into a balanced signal.

What does remap do in audio?

turns a balanced signal into an unbalanced signal, which is needed for amplifiers.

How does phase affect audio signals?

Can cause constructive or destructive interference based on time differences of signals, affecting high frequencies more.

What are the characteristics of a condenser microphone?

use capacitance change, require phantom power, and accurately record higher frequencies.

What is unique about ribbon microphones?

They are delicate, lacking good high-end response, and do not require phantom power.

What type of microphone is known for providing warmth and smooth audio?

Valve microphones