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1. Dither Type – Shaped PDF: This radio button selects Sonic
Studio’s proprietary spectrally shaped, triangular PDF (prob
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ability density function) redithering.
2. Dither Type – MBIT+: This radio button selects iZotope’s
proprietary psychoacoustic MBIT+ redithering.
Word Length: this selector determines the final word length, either 16. 20
or 24 bits. In general, dither should be enabled to ensure linear output when
Amarra Junior’s volume is reduced.
NOTE:: When the Output Wordlength is set to 24 bits the dither
will be “disabled” if the Gain has not been modified (at full volume).
Once the Gain is adjusted then dither is re-enabled.
For more information on dither, visit:
http://en.wikipedia.org/wiki/Dither#Digital_audio
6.5.4 Processing Settings
Full Sonic EQ: This feature is disabled in Amarra Junior.
Pure Gain: “Pure Gain” is a preference for calculating gain coefficients when
using the volume control. This refers to how Amarra MINI handles Gain
Settings.
•
“Pure Gain” uses an algorithm which is more efficient.
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It also means some gain values will not be exactly what is
typed. For example -6.0 would really be -6.00133
Hard Limit: Hard Limit refers to how gain is processed. It’s most useful for
compressed music.
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This has to do with how the floating point values are
handled after decoding.
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The maximum 24 bit value is really 0.99999989
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In Core Audio the maximum floating point value is 1.0
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Values in between this can cause distortion.
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This preference can improve the sound of compressed files.
Amarra MINI: User Manual
