PROD 2 Quiz 4

Buffer Underrun

When a buffer used to communicate between two devices is fed with data at a lower speed than the data is being read from it.Easily solved by increasing buffer size, but it will require more memory.

Slap-Back

The same as basic delay without feedback.Delay time is roughly 50-150ms.

Comb-Filter

The delay parameter of roughly 0-30msIn a flange can create a series of notches in the frequency response.This creates a filtered tone quality that sounds hollow, swishy, outer space like.

Echo

A sound or series of sounds caused by the reflection of sound waves from a surface back to a listener.Delay times greater than 30ms

Flange

Created by mixing a signal with a slightly delayed copy itself, where the delay time is constantly changing.Delay time relatively short from 0-20ms.

Chorus

When two people play instruments in unison.A time delay is created, changing over time (doubling effect).The pitch can deviate.The delay time in a chorus is usually between 30ms and 50ms plus pitch modulation.

Diffusion

The uneven surfaces that cause the reflections to bounce back in different direction.Thickens the sound.Creates more discrete echoes.

Damping

Sound waves will lose high frequencies as they bounce around soft surfaces, producing a warmer darker sound.

Delay

Takes the audio signal and plays it back after a set time.The building block for other effects.

Feedback

Takes the output of the delay, and it sends it back to the input.

50-100ms

A delay with a short echo of how many ms will create a doubling effect.

Decay Time

How long the reverb can be heard after the input stops.

Ping Pong Delay

Produces a bouncing sound between the left and right channels of a stereo signal.Uses two distinct delay lines each driven by an input.

LFO (Low Frequency Oscillator)

A function that is used to change the delay time.Shows how the decay changes over time.

Sweep Depth/Width

Controls how much the total delay time changes over time(ms)

Speed/Rate

The rate at which the LFO waveform repeats itself affecting pitch modulation.

Absolute Grid Mode

When a region is moved or trimmed it will snap to the nearest grid increment.

Relative Grid Mode

When you are able to move the region by a set grid value while still maintaining the regions start/end position.