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The Interpret Sample Rate command lets youhear how an audio file sounds at a different sample rate. (See Understandingsample rate.) This command helps you identify files thatspecify an incorrect rate in the file header. To then permanently convertthe sample rate, choose Edit > Convert Sample Type.

In the Waveform Editor, choose Edit >Interpret Sample Rate.
Enter a sample rate in the text box, or choose a commonsample rate from the list.

Note:

Although you can work with sample rates ranging from6000 to 192,000 Hz in Adobe Audition, your sound card may not becapable of playing all rates properly. To determine supported samplerates, consult the documentation for the card.

Thesample rate of a file determines the frequency range of the waveform.When converting the sample rate, keep in mind that most sound cardssupport only certain sample rates.

In the Waveform Editor, choose Edit >Convert Sample Type.
Note:
To quickly access the Convert Sample Typedialog box, double-click the Sample Type section of the status bar.(See Displaythe status bar.)
Select a rate from the Sample Rate list, or enter a customrate in the text box.
In the Advanced section, drag the Quality slider to adjustthe quality of the sampling conversion.
Higher values retain more high frequencies, but the conversiontakes longer. Lower values require less processing time but reducehigh frequencies.
Note:
Use higher Quality valueswhenever you downsample a high rate to a low rate. When upsampling,higher values have little effect.
For the best results, select Pre/Post Filter to preventaliasing noise.

Convert a waveform between surround,stereo, and mono

The Convert Sample Type command isthe quickest way to convert a waveform to a different number ofchannels.

In the Waveform Editor, choose Edit >Convert Sample Type.

From the Channels menu, select Mono, Stereo, or 5.1.

In the Advanced section, Enter percentages for Left Mixand Right Mix:

• When you convert from mono to stereo, theLeft Mix and Right Mix options specify the relative amplitude withwhich the original mono signal is placed into each side of the newstereo signal. For example, you can place the mono source on theleft channel only, the right channel only, or any point in between.

• When you convert from stereo to mono, the Left Mixand Right Mix options control the amount of signal from the respectivechannel that will be mixed into the final mono waveform. The mostcommon mixing method uses 50% of both channels.

For other channel-conversion techniques, see the followingtopics:

Thebit depth of a file determines the dynamic range of the audio. (See Understandingbit depth.) Adobe Audition supports up to 32‑bit resolution.You can raise the bit depth of a file to gain a greater dynamicrange, or you can lower the bit depth to reduce the file size.

Note:

Somecommon applications and media players require 16-bit or lower audio.

Inthe Waveform Editor, choose Edit > Convert Sample Type.

Select a Bit Depth from the menu, or enter a custom bitdepth in the text box.

In the Advanced section, set the following options:

Enables or disables dithering when converting to lowerbit depths. If dithering is disabled, bit depth is abruptly truncated,producing a crackly effect on low-volume passages caused by quantizationdistortion.

Although dithering introduces a small amount ofnoise, the result is far preferable to the increased distortionthat you would otherwise hear at low signal levels. Dithering alsolets you hear sounds that would be masked by the noise and distortionlimits of audio at lower bit depths.

Controls how dithering noise is distributed relativeto the original amplitude value. Usually, Triangular provides thebest tradeoff among signal‑to‑noise ratio, distortion, and noisemodulation.

Dither type	Reduces signal-to-noise ratio	Noise modulation
Triangular	4.8 dB	No
Gaussian	6.0 dB	Negligible

note: Triangular (Shaped) and Gaussian(Shaped) move slightly more noise to higher frequencies. For additionalcontrol, set Noise Shaping options.

Determines which frequencies contain dithering noise.By introducing noise shaping, you may be able to use lower ditherdepths without introducing audible artifacts. The best shaping dependson the source audio, final sample rate, and bit depth.

note: NoiseShaping is disabled for sample rates below 32Khz because all noise wouldremain in audible frequencies.

High Pass

With a crossover set to 7.3 kHz, drops dithering noise to-180dB at 0 Hz and -162dB at100 Hz.

Light Slope

With a crossover set to 11 kHz, drops noise to -3dB at 0Hz and -10dB at 5 kHz.

Neutral

Light is flat up to 14 kHz, ramps noise up to a maximum at17kHz, and is again flat at higher frequencies. Background noisesounds the same as it does without noise shaping but is about 11dBquieter.

Heavy is flat up to 15.5kHz, placing all ditheringnoise above 16kHz (or wherever you specify the crossover). Sensitiveears may hear a high pitched ringing if the crossover is too low.If converting 48 or 96 kHz audio, however, the crossover can beplaced well above 20 kHz.

Tip: Choose a Neutralshape to avoid sonically coloring background hiss. Note, however,that hiss will sound louder than with other shapes.

U-Shaped

Shallow is mostly flat from 2 kHz up to 14 kHz but gets louderas audio approaches 0 Hz because low frequencies are much less audible.Medium places a little more noise in the highs above 9 kHz, allowingfor lower noise below that frequency. Deep increases noise above9 kHz even more, but also lowers it much more in the 2-6 kHz range.

Weighted

Light attempts to match how the ear perceives low-level soundsby reducing noise more in the 2-6 kHz range and raising it in the10-14 kHz range. At high volumes, hiss may be more noticeable. Heavymore evenly reduces the most sensitive 2-6KHz range at the expenseof more noise above 8kHz.

Specifies the frequency above which noise shaping willoccur.

Specify the maximum amplitude of noise added to any onefrequency.

Publisher: Elsevier.

Varies the distribution of noise across frequencies.

If you need to make the same conversion onmultiple files, you can save time by using a sample rate conversionpreset.

Cw skimmer key. The download version of CW Skimmer is 2.1.0.410. The download is provided as is, with no modifications or changes made on our side. It may sharply differ from the full version of the program due to the license type.

After you create a preset, it appears in the Presets listat the top of the dialog box. If you want to delete a preset, chooseit from the list, and click the Delete button .