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Delay is an audio signal processing technique that records an input signal to a storage medium and then plays it back after a period of time. When the delayed playback is mixed with the live audio, it creates an echo-like effect, whereby the original audio is heard followed by the delayed audio.
Latency refers to a short period of delay (usually measured in milliseconds) between when an audio signal enters a system, and when it emerges.Potential contributors to latency in an audio system include analog-to-digital conversion, buffering, digital signal processing, transmission time, digital-to-analog conversion, and the speed of sound in the transmission medium.
A flanger is an effects unit that creates this effect. Part of the output signal is usually fed back to the input (a re-circulating delay line), producing a resonance effect that further enhances the intensity of the peaks and troughs. The phase of the fed-back signal is sometimes inverted, producing another variation on the flanger sound.
It uses tape delay to create a delayed copy of an audio signal which is then played back at slightly varying speed controlled by an oscillator and combined with the original. The effect is intended to simulate the sound of the natural doubling of voices or instruments achieved by double tracking.
Delay effects: Boss DD-3 Digital Delay, MXR Carbon Copy, Electro-Harmonix Deluxe Memory Man, Line 6 DL4, Roland RE-201. Looper pedal: A looper pedal or "phrase looper" allows a performer to record and later replay a phrase, riff or passage from a song. Loops can be created on the spot during a performance (live looping) or they can be pre-recorded.
“It is a complicated problem,” explains Allan Devantier, vice president of audio research and development at Samsung. To their credit, though, Devantier tells me Samsung has done a lot of work ...
Echoplex EP-2. The Echoplex is a tape delay effects unit, first made in 1959.Designed by engineer Mike Battle, [1] the Echoplex set a standard for the effect in the 1960s; according to Michael Dregni, it is still regarded as "the standard by which everything else is measured."
The AV-sync delay is static but can vary with the individual clip. Video editing effects can delay video causing it to lag the audio. Transmission (broadcasting), reception and playback that can get introduce AV-sync errors. A video camera with built-in microphones or line-in may not delay sound and video paths by the same amount.