Meridian America Digital Audio Processor Meridian 518 - Manual (Page 17)

Using 518 in Hi Fi Systems 17
518 User Guide
Shape C uses flat dither and a 9th-order shaper optimised to MAF.
Shape D uses high-pass dither and a 9th-order shaper optimised to
MAF.
Shape E uses high-pass dither and a 2nd-order shaper optimised to
MAF.
DSP
1. Press DSP to select the primary processing mode.
The display will show:
Gain 87
Gain has a flat frequency response, but the level of the signal level is
adjusted using a precision dithered multiplication. All the front panel
keys are available to specify processing.
1. Press DSP again.
The display will show:
Emph 87
Emphasis ensures that the output of 518 is always pre-emphasised
according to the 50/15µs CD standard. 518 uses precision DSP to pre-
emphasis the signal providing the incoming signal is not already pre-
emphasised. If the incoming signal is pre-emphasised the red Emph
light indicates this.
Emphasis is the recommended mode for most program material
providing the DAC system is correctly designed and uses analogue de-
emphasis.
or:
De-Emph 87
De-Emph provides the CD de-emphasis function to very high precision
when the incoming signal is pre-emphasised. You would use this only
if you have a DAC which provides digital de-emphasis. This adaptive
mode ensures that the output of 518 is never pre-emphasised.
Note Gain functions in Emphasis and De-Emphasis, in fact all the front
panel keys are available to specify processing.
Display
1. Press Display key to select between the following display formats
Emph 67
Pre-emphasis option and gain setting, or
ShpB 67
Dither mode and gain setting, or
CD 67
Source and gain setting, or
3 MAP, Minimum Audible Pressure, is the appropriate threshold curve for
human listeners using headphones.
Shape D
Shape E