Adobe 65021048 User Guide - Page 361

ADOBE PREMIERE PRO CS3 355 User Guide Bandpass effect The Bandpass effect removes frequencies that occur outside the specified range, or band of frequencies. This effect is available for 5.1, stereo, or mono clips. Center Specifies the frequency at the center of the specified range. Q Specifies the width of the frequency band to preserve. Low settings create a wide range of frequencies, and high settings create a narrow band of frequencies. Bass effect The Bass effect lets you increase or decrease lower frequencies (200 Hz and below). Boost specifies the number of decibels by which to increase the lower frequencies. This effect is available for 5.1, stereo, or mono clips. Channel Volume effect The Channel Volume effect lets you independently control the volume of each channel in a stereo or 5.1 clip or track. Each channel's level is measured in decibels. Chorus effect The Chorus effect simulates several voices or instruments played at once by adding multiple short delays with a small amount of feedback. The result is lush, rich sound. You can use the Chorus effect to enhance a vocal track or add stereo spaciousness to mono audio. You can also use it to create some truly out-of-this-world special effects. Adobe Premiere Pro uses a direct-simulation method of achieving a chorus effect, making each voice (or layer) sound distinct from the original by slightly varying timing, intonation, and vibrato. The Feedback setting adds extra detail to the result. To achieve the best results with mono files, convert them to stereo before applying the Chorus effect. Bypass Keyframeable option that specifies whether to apply or bypass the Chorus effect. Custom Setup Opens a mixer-style control panel that controls the Individual Parameters with knobs. Individual Parameters Opens a set of parameter controls for the Chorus effect. • LFO Type Specifies wave type of Low Frequency Oscillator: Sin(e), Rect(angle), or Tri(angle). • Rate Determines the maximum rate at which amplitude changes occur. With very low values, the resulting voice slowly gets louder and quieter, like a singer that cannot keep his or her breath steady. With very high settings, the result can be jittery and unnatural. Very high settings can produce interesting special effects (as in the Another Dimension preset). • Depth Determines the maximum variation in amplitude that occurs. For example, you can alter the amplitude of a chorused voice so that it is 5 dB louder or quieter than the original. At extremely low settings (less than 1 dB), the depth may be unnoticeable unless the Modulation Rate is set extremely high. At extremely high settings, however, the sound may cut in and out, creating an objectionable warble. Natural vibratos occur around 2 dB to 5 dB. Note that this setting is a maximum only; the vibrato volume might not always go as low as the setting indicates. This limitation is intentional, as it creates a more natural sound. • Mix Determines the ratio of Dry and Effects signal. A setting of 100% corresponds to a ratio of 1/1 while a setting of 0 will defeat the effect signal. April 1, 2008