IZOTOPE DITHER PDF

Ozone allows you to effectively convert and dither to 24, 20, 16, 12 or 8 bits. By default, the dither is off Type "None" , meaning that your program material is left in the original format. The following options are available when reducing the bit depth of the audio. Type None: No dither or bit reduction is applied.

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Ozone allows you to effectively convert and dither to 24, 20, 16, 12 or 8 bits. By default, the dither is off Type "None" , meaning that your program material is left in the original format.

The following options are available when reducing the bit depth of the audio. Type None: No dither or bit reduction is applied. Type 1: Dither is applied using a "rectangular" distribution function. While this provides a dither noise source with a low amplitude, the dither noise can become modulated by the audio signal and vary in level, which is undesirable in many situations.

Also, the non-linear quantization distortion is not completely suppressed in some situations with this low dither amplitude. Type 2: Dither is applied using a "triangular" distribution function. This dither is larger in amplitude and completely suppresses the non-linear quantization distortion. Shape By shaping the dither noise, it is possible to provide more effective and transparent dithering by shaping the dithered noise spectrum.

There are several different methods for shaping noise so that it is less audible yet still effective. Type 1 or Type 2 Shapes None: No noise shaping is applied Simple: High pass filtering is applied to the dithered noise. Clear: The noise is shifted towards the Nyquist frequency, near the upper limit of our hearing.

The shaping is designed to move the noise away from frequencies that are heard as "louder" at low levels.

Psych 9: A more complex ninth order psychoacoustic shaping is applied. In general, the "Clear" option is a safe bet for complex program material, although auditioning the dither against the Psych 5 and Psych 9 shapes may be more desirable in some cases.

Bit Depth This is the target bit depth for the audio. When mastering for a CD, for example, you would want this set to Note: Ozone does not perform the actual conversion of the audio. After processing a mix with Ozone, it is necessary to then actually convert the audio to the desired bit depth in the host application.

For example, if you have a bit audio file, you can use Ozone to dither down to 16 bits. The remaining 8 bits are "padded" as zeros. Do not perform any processing to the audio after it has been dithered with Ozone. You may perform level adjustment with the output gain sliders in Ozone those come before the dither but do not change any levels in the host app or with other plug-ins.

Almost all host apps have their master faders after the effects slot, so any level adjustment in the host app will destroy the dither. Do not put any plug-ins after Ozone if you are dithering with Ozone. The dither must be the last thing that touches the audio. Turn off dithering in the host app. For Type 1 and Type 2 dither, in most cases 1 bit will be sufficient, but in some situations the "over-dithering" obtained by setting Num Bits to 2 can be useful.

No dithering or Low dither amount can leave some non-linear quantization distortion or dither noise modulation, while higher settings completely eliminate the non-linear distortion at the expense of a slightly increased noise floor.

In general, the Normal dither amount is a good choice. Auto-blanking Selecting this option instructs Ozone to completely mute dither output i. Limit Peaks Dither noise is random in nature and has a very low amplitude. However, after noise shaping, especially in aggressive dithering modes, the high-frequency dither noise is significantly amplified, and the overall dither signal can show spurious peaks up to dB FS.

If such high peaks are undesirable, you can enable the Limit Peaks option to effectively suppress the spurious peaks in the noise-shaped dither. Suppress Harmonics If, for some reason, any dithering noise is undesirable, simple truncation remains the only option.

Truncation results in harmonic quantization distortion that adds overtones to the signal and distorts the timbre. In this case you can enable Suppress Harmonics option to slightly alter the truncation rules, moving the harmonic quantization distortion away from overtones of audible frequencies. Instead it works more like truncation, but with better tonal quality in the resulting signal.

This option is applicable only in the modes without dithering noise and without aggressive noise shaping. Again, please refer to our online guide for the background behind this. If you are dithering, turn the DC Offset filter to On. If the button says "On" the DC offset filter is on. Dithering Guide If you are interested in getting some practical tips for using dithering, as well as some of the theory behind it, please check out the Ozone Dithering Guide.

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Never Miss an Article! Sign up for our newsletter and get tutorials and tips delivered to your inbox. Can a topic possibly get any nerdier? My guess is no. Newsflash, though: not only am I a giant nerd, I also love to try to make complex topics accessible through analogies and visual demonstrations. Dither is simply noise. I get it.

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Dither Dither is a necessary process when converting from a higher bit resolution to a lower bit resolution. Dithering is used to tame the quantization distortion that happens when converting between bit depths due to requantization. Dither also preserves more of the dynamic range of a signal when converting to a lower bit depth. The result is a more pleasing sound and smoother fades.

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