iZotope MBIT+ Dither

From the Process menu, choose Bit Depth, and then choose iZotope MBIT+ Dither from the submenu to convert sound files to different bit depths and apply dithering.

Tip: Because the signal-to-noise ratio decreases when you decrease the bit depth of a file, you should maximize the volume of the sound file using the Volume or Normalize functions before performing the conversion.

1.From the Process menu, choose Bit Depth, and then choose iZotope MBIT+ Dither from the submenu. The iZotope MBIT+ Dither dialog is displayed.

2.Choose a setting from the Preset drop-down list, or adjust the controls as needed.

Item

Description

Bit depth

Choose the desired bit depth from the drop-down list.

 

Note: Increasing a file's bit depth cannot improve the quality of the existing audio,

 

but does allow higher resolution for processing.

 

 

Dither mode

Choose a setting from the drop-down to choose the type of dithering that will be

 

applied to mask quantization noise.

 

• Type 1 Uses a traditional rectangular probability distribution function.

 

• Type 2 Uses a traditional rectangular probability distribution function.

 

• MBIT+ Uses a proprietary algorithm to offer superior results for all types of source

 

material.

 

 

Noise shaping

Choose a setting from the drop-down list to control the amount of noise shaping that

 

will be applied.

 

When Type 1 or Type 2 is selected in the Dither mode drop-down list, the following

 

settings are available:

 

• None No noise shaping is applied.

 

• Simple A high-pass filter is applied to the dither noise.

 

• Clear Aggressively moves dither noise toward the Nyquist frequency.

 

• Psych5 Uses a fifth-order filter to move dither noise away from audible frequency

 

bands.

 

• Psych9 Uses a ninth-order filter to move dither noise away from audible frequency

 

bands.

 

When MBIT+ is selected in the Dither mode drop-down list, you can choose a setting

 

from the Noise shaping drop-down list to control the amount of noise shaping

 

applied. Increased settings will provide more audible noise suppression at the

 

expense of a higher noise floor.

 

 

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