Adobe 22011292 User Guide - Page 191

ADOBE AUDITION 177 User Guide • Minimum: When adding bandpassed echoes, this is the lower cutoff frequency of the echo. For example, to echo just the range from 500Hz to 1000Hz, enter 500Hz for the minimum value. • Maximum: When adding bandpassed echoes, this is the upper cutoff frequency of the echo. For example, to echo just the range from 500Hz to 1000Hz, enter 1000Hz for the maximum value. • FIR Size: This parameter sets the size of the FIR filter to use to generate the filtered echo. Note: Adobe Audition recommends a minimum delay (below the FIR entry box) when you add this echo. If you use a smaller delay than that suggested, the echo may contain more frequencies than you want. You can ignore this delay for full spectrum echoes, as they are just single sample ticks in the impulse. Add to Impulse These settings let you add features to impulses. • Add Sel: This setting adds the currently highlighted selection to the impulse at the delay and left/right volumes specified. You can add as many selections of actual audio as you like. Note: You can make any audio data part of an impulse by first highlighting the audio and then using the Add Sel. >> button. Ordinarily, you should first scale down any such selection to a lower volume; otherwise the convolution will come out extremely loud. • Add Echo: Pressing this button will add the bandpassed echo to the impulse at the delay and left/right volumes specified. You can add as many echoes as you like. Note: To add a tick at any volume, enter the volume percentages after the Left and Right settings, and the Delay at which the tick should appear. This will cause an echo of the specified volume to occur at the given delay after convolution. Besides just echoes, you can add filtered versions of echoes by entering the minimum and maximum frequencies to echo. To echo all frequencies outside the range, add a full spectrum echo (e.g. from 0Hz to 22050Hz) at a specific delay, then add another echo at the same delay, but with different minimum and maximum values, and the opposite Left and Right percentages (e.g. at -100% instead of 100%). • Delay: This parameter sets the amount (in milliseconds) by which samples are delayed. For pre-echoes, place at least one echo that is full spectrum (Minimum=0Hz, Maximum=22050Hz) at a larger delay (like 1000ms). Then any echo placed before 1000ms will be a pre-echo. • Left : This setting specifies the left volume (in percent) at which to make the echo or selection being added to the impulse. • Right: This setting specifies the right volume (in percent) at which to make the echo or selection being added to the impulse. Global Settings These settings effect how the given impulse will be used during convolution. • Volume: If the convoluted audio comes out too soft or too loud, enter an appropriate value to amplify or attenuate the audio. • Shift: This value is generally set to one-half the FIR Size when building impulses from scratch, to compensate for the delay incurred when the minimum delay used was only one-half the FIR size. Adjust this shift setting if you find that the convoluted audio is migrating too far to the right with respect to the original audio.