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The DigiTech Whammy is a pitch shifter pedal manufactured by DigiTech.It raises or lowers the pitch of an audio signal by up to two octaves, controlled with a treadle.The first model, released in 1989, was the first mass-market digital pitch shifter.
In the 1990s and 2000s, broadly comparable products became available from BBE, Joemeek, SPL and Behringer. Most are analogue signal processors, although a few digital units began to appear in the 2000s. The BBE Sonic Maximiser uses a similar process of frequency-dependent phase shifting, as do other brands to a varying extent.
TC Electronic was founded by two musician brothers, Kim and John Rishøj. Their SCF, ("Stereo Chorus + Pitch Modulator & Flanger") was a successful early product. [1] After initial success with guitar effect pedals, they developed 19" rack mounted processors, including the TC2290 delay released in 1985.
Pedal-style multi-effects range from fairly inexpensive stompboxes that contain two pedals and a few knobs to control the effects to large, expensive floor units with many pedals and knobs. Rack-mounted multi-effects units may be mounted in the same rack as preamplifiers and power amplifiers.
The mixer circuit can be used not only to shift the frequency of an input signal as in a receiver, but also as a product detector, modulator, phase detector or frequency multiplier. [6] For example, a communications receiver might contain two mixer stages for conversion of the input signal to an intermediate frequency and another mixer employed ...
The famous bass intro to the song "Seven Nation Army" by The White Stripes, is the result of guitarist Jack White playing an electric guitar through a pitch shifting effects pedal set to an octave below. The band was a duo, who lacked a bassist and had never previously used one in any of their music, choosing instead to mimic the sound of a ...
In the physical sciences and in telecommunication, the term frequency shift may refer to: Any change in frequency; A Doppler shift; In facsimile, a frequency modulation system where one frequency represents picture black and another frequency represents picture white; Spectrum shifting in signal processing, see Discrete Fourier transform#Shift ...
The feedback network 'shifts' the phase of the amplifier output by 180 degrees at the oscillation frequency to give positive feedback. [1] Phase-shift oscillators are often used at audio frequency as audio oscillators. The filter produces a phase shift that increases with frequency. It must have a maximum phase shift of more than 180 degrees at ...
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