Adobe 22011292 User Guide - Page 132

118 CHAPTER 8 Effects Menu - Edit View Delay Rate This parameter determines the time taken for the delay to cycle from its zero-to-maximum delay setting. Because the actual delay used varies over time, the pitch of the sample will increase or decrease over time, placing each voice slightly out of tune with the others (which is what gives the effect of a separate voice). For example, a value of 2Hz means the delay used could vary from no delay to the maximum delay and back twice each second (sort of a pitch vibrato at 2 times a second). Please note that this is only a maximum; if you set it to 2Hz, it may only go part way between zero and the maximum delay, and then start cycling back before reaching the maximum. • If this setting is very low, the individual voices won't vary much in pitch at all. • If it is set high, the voices may vary so quickly that "warbling" effects can be heard. Feedback Use this setting to include a certain percentage of processed chorused voices back into the mix. This can give your waveform an extra echo or reverb effect. Note: Be very careful with this setting. Just a little feedback (less than 10%) can give an extra richness to the effect (and even this depends on the delay and vibrato settings). If too much feedback is used, more traditional feedback noise will be heard, like loud ringing or other artifacts. These may get so loud that they will clip and destroy the signal. However, sometimes this can be a desired effect, as in the Flying Saucers setting, where it generates sounds that are reminiscent of warbly UFOs whizzing around your head. Spread The spread setting gives an added delay to each voice, separating them in time by as much as 200 milliseconds (1/5th of a second). • High spread values cause the separate voices to start at different times - the higher the value, the further apart the onset of each word may be, for example. • With low values, the effect is of all the voices singing in unison. Depending on other settings, low values may also bring out some flanging effects, which may be undesirable if your goal is a realistic chorus effect. Vibrato Depth Another property that varies with each voice is vibrato, which describes how the amplitude varies over time. This value determines the maximum variation in amplitude that will occur. For example, a value of 5dB may alter a chorused voice by varying its amplitude by as much as 5dB louder or quieter than the original. • If this setting is extremely low (less than 1dB) the vibrato may be unnoticeable unless the Vibrato Rate has been set extremely high. • If Vibrato Depth is set too high, however, the sound may cut in and out, creating an objectionable warble. Natural vibratos occur around 2dB to 5dB. Please note that this is a maximum depth - just as in the delay settings, the vibrato volume may not go as low as the setting indicates at times. This limitation is intentional, as it gives a more natural feel to the effect. Vibrato Rate The Vibrato Rate determines the maximum rate at which vibrato will occur. • With very low values, instead of a vibrato effect, the resulting voice will slowly get louder and quieter, like a singer that cannot keep his or her breath steady. • If the vibrato rate is set high, the result can be very unnatural - more like a singer who had too much coffee.