audiopraise VanityPRO Benutzerhandbuch - Seite 12

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Filters Characteristics

There are four conversion filter characteristics available in the Vanity

in their steepness and the amount of attenuation of the ultrasonic noise. All four characteristics

can be used when the output sampling rate is set to 176.4kHz and only two with

88.2kHz. The filters optimized for 88.2kHz output sampling rate have "LB" suffix for "Low

Bandwidth" and filters optimized for 176.4kHz output sampling rate have "HB" suffix for "High

Bandwidth". The frequency plots below show output spectrum of DSD test signal with 1kHz tone

at 0dB converted to PCM 24bit and 176.4kHz. Typical bumps if the DSD noise floor can be

observed in the audio frequency band.

Sharp LB

This filter optimized for 88.2kHz output sample rate has sharp roll-off with cut-off

frequency approximately 20kHz. Chose this filter for high attenuation of the ultrasonic noise.

Slow LB

This filter optimized for 88.2kHz output sample rate has slow roll-off with cut-off

frequency approximately 25kHz. Chose this filter for better transient response with slightly higher

level of the ultrasonic noise.

Page 12 of 19

– User Manual v1.2

Vanity

PRO

. The filters differ