TC Electronic SYSTEM 6000 MKII Algorithm Manual - Md 5.1

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MD 5.1

Performance Settings

Crest

Range: 

Peak, 6dB, 10dB, 12dB, 14dB, 16dB, 20dB, 24dB, RMS

Select compression method between RMS and PEAK. 

The dB steps between RMS and Peak are the dBs needed 

for a peak-value to override RMS measurement.

Nominal Delay

Range: 0 to 15ms 

(2ms in 0.5ms steps)

Sets the nominal Delay of the signal compared to the 

Sidechain signal. This is also known as “Look ahead 

Delay”, enabling the Compressor section to become more 

responsive to the incoming signal.

Automatic Make Up Gain

Range: Off/On

Switches the Automatic Make-up gain On or Off. As using 

compression is a reduction of dynamic range in the signal 

a compensation for this loss of gain on the Output side is 

possible. Use the Auto Make Up gain to achieve this.

Reference Level

Range: -24dBFS to 0dBFS in 0.5dB steps

This parameter sets the reference level in the algorithm. 

The reference level is the level at which the Threshold 

parameters will start operating when set to 0dB. E.g. if 

the Reference Level is set to -18dBFS (often referred 

to as 0dBu), a Threshold setting at -4dB, will cause the 

Compressor to start operating at -22dBFS.

Side Chain - Control page

The Sidechain assignment possibilities in the MD-5.1 are 

very comprehensive. Carefully selecting which channels 

should be controlled by which Sidechains, is just as 

essential as dialing in the correct Threshold and 

Ratio values.

It is possible to freely select any or none of three 

Sidechains to control each of the main-channels. This also 

gives you the option of grouping the channels. In addition 

to this, the LFE channel has its own Sidechain control. 

This enables e.g. setting up two MD-5.1 algorithms in serial 

setup, while having six individual Sidechains available, 

enabling fully individual Sidechain controls of all channels.

At the Feed page it is possible to make additional Sidechain 

link Inputs, for e.g. having the Center-channel contributing 

to the Sidechain Inputs of the two Front channels, to create 

a more coherent sound from the front-channels.

The illustration above reflects the Processing parameter set 

to MD-5.1 in Normal mode.

Basic operation

At the Setup/Control page it is possible to decide which 

Sidechains should control which channels. Select any 

of three Sidechains to be assigned to any of the five 

Main-channels. You can also chose to pass the channels 

unprocessed through the algorithm. The LFE channel 

can be assigned to its own separate Sidechain, or left 

unprocessed.

Setting a channel to unprocessed will preserve the 

processing delay through the algorithm, keeping the 

channel time-aligned to the other (processed) 

channels.

Side Chain Control 

Range - for the five main channels: 

•  Unprocessed

•  Side Chain 1

•  Side Chain 2

•  Side Chain 3

Range - for the LFE channel: 

•  Unprocessed

•  LFE

Side Chain - Feed page

The Setup/SC Feed page holds parameters specifying 

which Input channels should feed the three Sidechains.

Normal

Range: Off, On

When this parameter is set to “On” the Input channels 

selected to be controlled by the respective sidechain will 

also input to the sidechain.

Add 1, Add 2 and Add 3

Range: Off,  LFr Max, RFr Max, Cnt Max, LSr Max, RSr 

Max, Xt Max, LFr Sum, RFr Sum, Cnt Sum, LSr Sum, RSr 

Sum, Xt Sum.

These parameters enable extra channels to be assigned to