Effects and Plug-Ins : Mastering Peak/VU Meters
13 - 361
DSD Filtering options
In the specific case of a DSD session the VU meter offers three filtering options which allow you to make sure that
your DSD signal is compatible to Annex D.4 of the SACD Scarlet Book concerning the high frequency dither noise
content. These radio buttons let you choose one of three possible filters which will be applied to the DSD signal
before it is measured by the level meter.
The 20k option applies a 20 kHz low pass filter to the signal, thus only the audible audio content is measured.
The 20k-50k option applies a band pass filter with a frequency range of 20 kHz to 40 kHz to the signal. According
to Annex D.4 of the SACD Scarlet Book the signal level in this frequency range should not exceed -28 dB.
The 40k-100k option applies a band pass filter with a frequency range of 50 kHz to 100kHz to the signal. Accord-
ing to Annex D.4 of the SACD Scarlet Book the signal level in this frequency range should not exceed -20 dB.
Measurement Accuracy
Where maximum accuracy is required select High. However, this setting does require extra processing.
Note: In order to avoid such HF noise residuals whenever it is intended to release material in
PCM, Merging Technologies usually recommends users to work in DXD, for preference. Please
see the FFT plots on the next page.
For more information on how to cope with the High Frequency noise content of the DSD a good starting point is
to read the Wikipedia entry on DSD at:
http://en.wikipedia.org/wiki/Direct_Stream_Digital
Refer in particular to the DSD Technique chapter.
To Next Page
Loading...