# Sonic artifact

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{{Short description|Audible defect generated during the recording or editing of a sound}}
{{Refimprove|date=December 2009}}

In [sound](/source/sound) and [music production](/source/music_production), '''sonic artifact''', or simply '''artifact''', refers to sonic material that is accidental or unwanted, resulting from the editing or manipulation of a sound.

==Types==
Because there are always technical restrictions in the way a sound can be recorded (in the case of [acoustic](/source/acoustic_music) sounds) or designed (in the case of [synthesised](/source/sound_synthesis) or processed sounds), sonic errors often occur.  These errors are termed artifacts (or sound/sonic artifacts), and may be pleasing or displeasing. A sonic artifact is sometimes a type of [digital artifact](/source/digital_artifact), and in some cases is the result of [data compression](/source/data_compression) (not to be confused with [dynamic range compression](/source/dynamic_range_compression), which also may create sonic artifacts).

Often an artifact is deliberately produced for creative reasons, for example to introduce a change in [timbre](/source/timbre) of the original sound or to create a sense of cultural or stylistic context. A well-known example is the overdriving of an electric guitar or electric bass signal to produce a [clipped](/source/clipping_(audio)), distorted guitar tone or [fuzz bass](/source/fuzz_bass).

{{anchor|Surface noise}}Editing processes that deliberately produce artifacts often involve technical experimentation.  A good example of the deliberate creation of sonic artifacts is the addition of grainy pops and [click](/source/clicking_noise)s to a recent recording in order to make it sound like a vintage [vinyl record](/source/vinyl_record).

[Flanging](/source/Flanging) and [distortion](/source/distortion) were originally regarded as sonic artifacts; as time passed they became a valued part of pop music production methods. Flanging is added to electric guitar and keyboard parts. Other magnetic tape artifacts include [wow](/source/Wow_(recording)), [flutter](/source/Flutter_(electronics_and_communication)), [saturation](/source/Saturation_(magnetic)), [hiss](/source/tape_hiss), [noise](/source/Signal-to-noise_ratio), and [print-through](/source/print-through).

It is valid to consider the genuine surface noise such as pops and clicks that are audible when a vintage vinyl recording is played back or recorded onto another medium as sonic artifacts, although not all sonic artifacts must contain in their meaning or production a sense of "past", more so a sense of "by-product".{{clarify|date=December 2010}} Other vinyl record artifacts include [turntable rumble](/source/turntable_rumble), ticks, [crackle](/source/crackling_noise)s and [groove echo](/source/groove_echo)s.

In the [Nyquist–Shannon sampling theorem](/source/Nyquist%E2%80%93Shannon_sampling_theorem), inadequate sampling bandwidth creates a sonic artifact known as an ''[alias](/source/aliasing)'', and the resulting distortion of the sound is termed ''aliasing''.  Examples of aliasing can be heard in early music [samplers](/source/Sampler_(musical_instrument)) since they could record audio at bit rates and sampling frequencies below the Nyquist rate, considered desirable by some musicians.<ref name="SP-12">{{cite web | publisher=[VintageSynth.com](/source/VintageSynth.com) | year=2009 | title=E-mu SP-12 | url=http://www.vintagesynth.com/emu/sp12.php | accessdate=2009-12-21}}</ref>  Aliasing is a major concern in the analog-to-digital conversion of video and audio signals.

In the creation of [computer music](/source/computer_music) and [electronic music](/source/electronic_music) in the past decade, particularly in [glitch music](/source/glitch_(music)), software is used to create sonic artifacts of all stripes. They are also the primary focus of the practice of [circuit bending](/source/circuit_bending): making sounds from products that were unintended by the makers of the circuitry.

==See also==
* [Data compression](/source/Data_compression)
* [Digital artifact](/source/Digital_artifact)
* [Dynamic range compression](/source/Dynamic_range_compression)
* [Glitch (music)](/source/Glitch_(music))
* [Compression artifact](/source/Compression_artifact)
* [Sampling (signal processing)](/source/Sampling_(signal_processing))
* [Signal (information theory)](/source/Signal_(information_theory))
* [Window function](/source/Window_function)
* [Circuit bending](/source/Circuit_bending)
* [Sound reproduction](/source/Sound_reproduction)
* [Noise music](/source/Noise_music)
* [Noise pumping](/source/Noise_pumping)
* [Breathing (noise reduction)](/source/Breathing_(noise_reduction))
* [Codec listening test](/source/Codec_listening_test)

==References==

{{reflist}}

{{DEFAULTSORT:Sonic Artifact}}
Category:Sound recording
Category:Sound production
Category:Signal processing
Category:Audio effects
Category:Musical techniques
Category:Music production

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Adapted from the Wikipedia article [Sonic artifact](https://en.wikipedia.org/wiki/Sonic_artifact) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Sonic_artifact?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.
