Time Delays and Phasing

Question 1

. Phasing is also called __________ and its frequency response corresponds to that of a __________ filter

Answer 1

flanging, comb

Question 2

The frequencies “missing” because of phasing are the ________ harmonics, whereas those that are emphasized are the ____________ harmonics

Answer 2

odd, even

Question 3

Feedback of a sound with a delay in the phasing range will result in an apparent ____________ being added to it

Answer 3

pitch

Question 4

Phasing is the result of the cancellation of certain frequencies when the time delay between the two signals is equal to _____________ wavelength of that frequency or its odd multiples

Answer 4

1/2

Question 5

The phasing effect is strongest when the time delay involved is less than _________ ms

Answer 5

10 ms

Question 6

Sound that is sampled and stored in a digital delay unit can be played back with a delay time that can be ____________ periodically, as well as ___________ back into the delay memory

Answer 6

modulated, recirculated

Question 7

Modulation of the time delays in a delay line at sub-audio rates produces effects such as ________, depending on the speed and depth of the modulation

Answer 7

pitch changes

Question 8

Halving the input and output sampling rate of a digital delay unit in order to double the delay time reduces the ________ of the signal

Answer 8

bandwidth

Question 9

As the time delay between two signals being mixed increases, the various effects that are heard, in order, are ________, ________, and then ________

Answer 9

phasing, reverberation, echo