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The use of found objects in music takes one of two general forms: either objects are deliberately recorded, with their sound used directly or in processed form, or previous recordings are sampled for use as part of a work (the latter often being referred to simply as "found sound" or "sampling").
This process involves several audio analysis tasks, which may include multi-pitch detection, onset detection, duration estimation, instrument identification, and the extraction of harmonic, rhythmic or melodic information. This task becomes more difficult with greater numbers of instruments and a greater polyphony level.
Search by sound is the retrieval of information based on audio input. There are a handful of applications, specifically for mobile devices that utilize search by sound. Shazam, Soundhound, Axwave, ACRCloud and others have seen considerable success by using a simple algorithm to match an acoustic fingerprint to a song in a library.
It searches an index of over 1,000,000 sounds on the internet, with 100,000 users and 1,000,000 searches each month. The index mainly consists of sound effects and musical instrument samples. Results are in AIFF, AU and WAV formats, in both mono and stereo. The site offers the FindSounds Palette, a program which also searches the FindSounds index.
The whirly tube, corrugaphone, or bloogle resonator, also sold as Free-Ka in the 1960s-1970s, is an experimental musical instrument which consists of a corrugated (ribbed) plastic tube or hose (hollow flexible cylinder), open at both ends and possibly wider at one end (), the thinner of which is rotated in a circle to play.
A number of instruments have been invented, designed, and made, that make sound from matter in its liquid state. This class of instruments is called hydraulophones . Hydraulophones use an incompressible fluid, such as water, as the initial sound-producing medium, and they may also use the hydraulic fluid as a user-interface.
percussive effects, such as drumming on a string instrument body; palm and finger muting ("pizzicato") tapping on the fingerboard; string pops and slaps (fingerboard instruments) preparation of a guitar by inserting screws or pieces of metal in the bridge or between the strings. detuning a string while playing
A sound effect (or audio effect) is an artificially created or enhanced sound, or sound process used to emphasize artistic or other content of films, television shows, live performance, animation, video games, music, or other media.