beautypg.com

Dither selector options – Drawmer 1962 Digital Vacuum Tube Pre-Amplifier User Manual

Page 22

background image

1962 OPERATORS’ MANUAL

18

DITHER SELECTOR OPTIONS

Position Dither and Noise Shaping

1

Positions the noise shaped dither to the very top of the audio spectrum at a
level of +30dB above the quantise noise floor. Because the ears are very
insensitive at this frequency, the noise is inaudible, resulting in a subjectively
clean signal with a wide dynamic range. Adding extreme HF EQ boost at a
later stage is not recommended.

2

The same frequency as 1 (above) with only +20dB of boost. The reduction in
level slightly increases distortion, but the tolerance to HF EQ on replay is
increased.

3

Shaped dither above 17KHz @ +30dB.

4

Shaped dither above 17KHz @ +20dB.

5

Dual slope filtered dither above 16KHz @ +10dB. A particularly effective
setting combining subjective neutrality with a worthwhile increase in dynamic
range and high tolerance to post HF EQ.

6

Shaped dither above 14KHz @ +20dB.

7

Shaped dither above 14KHz @ +15dB.

8

Shaped dither above 12KHz @ +15dB.

9

Smooth, dual-slope filtered dither above 10KHz @ +10dB. A relatively
gentle noise shaping with a worthwhile increase in dynamic range and a
neutral sound.

10

Shaped dither above 10KHz @ +10dB.

11

White noise dither. No noise shaping.

12

Dither / Noise shaping OFF. Caution as a truncated word length will give
distortion.

A

Tape Playback Tracks 1,2 & 3 in high resolution modes; tracks 1,2 in 16-bit
mode.

B

Tape Playback Tracks 1,2 & 3 in high resolution modes; tracks 3,4 in 16-bit
mode.

C

Tape Playback Tracks 5,6 & 7 in high resolution modes; tracks 5,6 in 16-bit
mode.

D

Tape Playback Tracks 5,6 & 7 in high resolution modes; tracks 7,8 in 16-bit
mode.