Effects and Signal Processors - Delay

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Adds delayed copies of the signal, creating an echo effect. At first this sound was generated using an analogue recorder and exploiting the distance between the reproduction head and the recording head. By sending the left channel output to the input of the right channel and vice versa, as well as manipulating the ribbon's speed, one obtained a versatile and, for its time, revolutionary effect. The digital era has very much simplified things. Nowadays this effect is very easy to create and digital technology has opened the doors to interesting innovations like ping-pong delay (the sound repetitions are alternately sent to the right and left channel) and multi tap delay (the echoes are repeated with different time intervals, creating a dissolving effect). In music, delay time is often based on the song's tempo. This way, the sound-repetitions take place in time with the music, creating an effect which further fills up the sound. To calculate the delay time (in milliseconds) needed for a musical piece with n beats (bpm beats per minute) we can use the following formula:

Delay time (ms)= 60000 ms/bpm

The following is a sound to which a delay effect of two different kinds has been applied:

Table 7.2. Delay effect 

Simple delay [Track 24]

Effects and signal processors - Simple delay[Track 24]

Delay with greater feedback [Track 25]

Effects and signal processors - Delay with greater feedback[Track 25]


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