Your Home Studio - a basic tutorial on home recording studio setup, including building a home recording studio, digital recording techniques, computer recording information, recording software information, how to buy equipment for a home recording studio and operating an audio recording studio at homeYour Home Studio - a basic tutorial on home recording studio setup, including building a home recording studio, digital recording techniques, computer recording information, recording software information, how to buy equipment for a home recording studio and operating an audio recording studio at home

 

Your Home Studio Dot Com

Chorus and Flanging

 

 

       Chorus and Flanging are both time-based effects. Other time based effects include reverb, delay and phasing (a close relative to flanging). Chorus was first used as effect by John Lennon. He got tired of double tracking his vocals to thicken them and he challenged one of the engineers at Abbey Road to come up with a device to simulate the double tracked sound. What the engineer came up with was a device that took the original signal and split it. One of the split signals was delayed by a small amount (20-30ms) varied by a Low Frequency Oscillator (LFO). The two signals were then recombined.  What resulted is what we now called chorus. It is a result of the two signals going in and out of phase and giving the illusion of more than one instrument or vocal. The controls on chorus effects can include depth (the range of the LFO), speed, delay, and mix (clean vs effected). Some choruses will allow you to select different waveforms for the LFO. By combining 2 chorus circuits in parallel and including the ability to pan them individually, you get a stereo chorus. Software choruses can have 4 or more individual chorus modules that can be panned and harmonizing effects add pitch-shifting to the front end of a chorus.

 

      Sound examples of Chorus

     

      1) Unaffected

      2) Deep Chorus

      3) Stereo Chorus     

 

      Flanging uses the same circuitry as chorus but shorter delay times (1-10ms). It has a characteristic whooshing sound with minor pitch fluctuations. Because the delay is so short, you don’t have the perception of two separate instruments. Instead, what happens is that the phasing has an effect on the frequency response by eliminating some frequencies and boosting others. Flanging was invented by having two tape reels playing the same track and creating a delay in one by pressing on the flange of the tape wheel and thereby slowing it down.

 

      Sound Example of Flanging

      1) Unaffected

      2) Classic Flange

      3) Trippy Flange

 

      Some classic chorus effects include the Boss CE-1 chorus pedal, Boss’ CE-2 stereo chorus and the chorus circuitry included in the Roland Jazz Chorus guitar amplifiers. TC-Electronics Stereo Chorus Flanger and Boss’ BF-3 are two widely used and emulated flangers.

     

In the next newsletter, we’ll explore phasing.

 

 

 

 

 

 

 

Barnes & Noble.com Music Store

Copyright 2006