Comb Filter

Summing two signals   Comb filtering occurs when two audio signals are summed together with the difference in very small delay between them. This effect tends to happen a lot when two or more microphones are picking up the same audio signal. They then summit...

Formant Filter

 Speech Synthesis   In speech synthesis, formant filters are often used to simulate formant filtering by the vocal tract. Passing a “buzz source” through only two or three formant filters simulate different vowel speech sounds. As a result, speech is fully...

Low Pass Filter

What is a Low Pass Filter   A low pass filter, known as LPF, is essentially a filter that reduces or eliminates the frequencies above the cutoff frequency. It passes low-frequency signals and blocks or impedes, high-frequency signals. In audio applications, this...

High Pass Filter

What is a high pass filter?   In order to put it simply, we could say that the high pass filter is just a filter (low-cut) that attenuates frequencies below the certain cutoff frequency and allows the frequencies above to pass. There are many kinds of high pass...

Wah Wah Filter

The definition for the wah-wah effect, according to Erickson in 1975, is that the effect is produced by periodically bringing in and out of play treble frequencies while a note is sustained. Therefore, the effect is a type of spectral glide, a “modification of...

Phaser

Electric guitar effect   Phasing is a popular effect for electric guitar. The term was often used to refer to the original tape flanging effect heard on many psychedelic records of the late 1960s. In 1968, Shin-ei’s Uni-Vibe effects pedal, designed by audio...