Using 518 for Mastering and Multimedia

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Description

The Meridian 518 Digital Audio Processor is a general-purpose digital- domain DSP engine that operates on or between consumer or professional interfaces at sampling frequencies between 32–50kHz and with up to 24 bit input and output.

The supplied user programmes are intended for use in recording, editing, mastering and replay situations.

The primary functions of 518 permit the correct signal processing when moving between carriers or channels of different word size. Options are also offered – in the form of noise-shaping, gain control and precision pre and de-emphasis – to maximise the subjective dynamic range of the final carrier or channel. Typical applications would be to use 518 at all stages, i.e. between an A/D converter and a recorder; then between the recorder and any editor; and finally between the editor and the final carrier.

518 has been extensively beta-tested, there are many highly-regarded commercially-available CDs that have used its processes.

518 as a Mastering or Multimedia Processor (Type 2)

This section covers unusual features of 518 operation when used in mastering or Multimedia processor mode (Type 2). Please refer to the normal operating instructions on page 15 for more details.

Meridian 500 Comms warning

We strongly recommend that you do not connect anything to the Comms sockets in Type 2. The behaviour of the 518 may be unpredictable.

If you want to use 518 as a Mastering or Multimedia Processor along with other Meridian equipment, we suggest you start from Type 1 and build the appropriate functionality in Config.

Emphasis Light

There is an Emph light on the front panel which indicates when the channel status suggests that the incoming audio is pre-emphasised. It is not affected by the user's settings on the 518 itself. Obviously in this circumstance, it is not advisable to pre-emphasise again using 518! Routinely 518 prevents you from making this mistake, however, against the possibility that the incoming channel-status may be wrong, you can over-ride this protection, see *Emph on page 26.

Selecting a source

1.press Source until the input you require is indicated

2.release Source

Gain control

Gain control is provided in one decibel steps from +12 dB down to -99 dB.

1. Press ▲

The gain will increase in 1dB increments, and the display will show the gain in dBs, something like:

D1 +2

1. Press ▼, to decrease the gain.

518 User Guide

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Meridian America Meridian 518 Description, As a Mastering or Multimedia Processor Type, Meridian 500 Comms warning, D1 +2