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ADOBE AUDITION 1.5
User Guide
Auto-Convert Settings For Paste When pasting different sample formats, Adobe Audition
uses these settings when auto-converting the clipboard to the current sample format. Valid
settings range from 30 to 1000.
• Downsampling Quality Level: Enter a value (30 to 1000) for downsampling quality.
Higher values retain more high frequencies while still preventing the aliasing of higher
frequencies to lower ones. A lower quality setting requires less processing time, but
results in certain high frequencies being rolled off, leading to muffled-sounding audio.
Because the filter’s cutoff slope is much steeper at higher quality settings, the chance of
ringing at high frequencies is greater. Usually values between 80 and 400 do a great job
for most conversion needs. The default value is 80.
• Pre-Filter: To prevent any chance of aliasing, the pre-filter on downsampling removes
all frequencies above the Nyquist limit, thus keeping them from generating false
frequencies at the low end of the spectrum. In general, select this option for best results.
• Upsampling Quality Level: Enter a value (30 to 1000) for upsampling quality. Higher
values retain more high frequencies while still preventing the aliasing of higher
frequencies to lower ones. A lower quality setting requires less processing time but
results in certain high frequencies being rolled off, leading to muffled-sounding audio.
Because the filter’s cutoff slope is much steeper at higher quality settings, the chance of
ringing at high frequencies is greater. Usually values between 100 and 400 do a great job
for most conversion needs. The default value is 120.
Yo u should use a higher value whenever you downsample from a high sample rate to a low
rate. For upsampling, a lower value produces quality almost identical to a higher value.
The difference lies in the larger phase shift that exists at higher frequencies, but since the phase
shift is completely linear, it’s very difficult to notice. Downsampling, at even the lowest values,
generally doesn't introduce any undesired noisy artifacts. Instead, the sound might be slightly
muffled because of the increased high-end filtering.
• Post-Filter: To prevent any chance of aliasing, the post-filter on upsampling removes all
frequencies above the Nyquist limit, thus keeping them from generating false
frequencies at the low end of the spectrum. In general, select this option for best results.
Dither Amount For Saving 32-Bit Data To 16-Bit Files Enables dithering when pasting
32-bit audio to 16-bit. The default value of 1 (bit) enables dithering, while a value of 0
disables dithering. For semi-dithering, choose a value of 0.5.
With dithering, you get almost 24-bit sample performance in only 16 bits, as the dynamic
range is increased by another 10 dB or so. This allows signals as quiet as –105 dB.
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