Delay Downmix Matrix

What the Downmix Matrix Does

The Downmix Matrix routes signals from main beams to fill and LF beams.

It allows you to:

• send the same signal used by your main beams to fill or LF beams

• apply gain and delay per routing point (crosspoint)

This routing is required if your project contains Fill or LF Function Groups. Without Downmix routing, fill and LF beams will not receive signal from the mains.

The Downmix Matrix is organised as follows:

• Rows represent Main Function Groups (signal sources)

• Columns represent Fill and LF Function Groups (signal destinations)

Each intersection between a row and a column is a crosspoint.

Routing is always created from mains to fills or LF by enabling a crosspoint at the intersection between them.

The Downmix Matrix is must be used in conjunction with Function Groups.

Before using the Downmix Matrix:

• Main beams must be assigned to a Main Function Group (all beams are auto-added to Main Function Groups unless explicitly marked as fills).

• Fill beams must be assigned to Fill Function Groups

• Low‑frequency beams must be assigned to LF Function Groups

If no Fill or LF Function Groups exist, all beams remain in the Main Function Group and the Downmix Matrix will only show mains.

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Creating Downmix Routing

When Fill or LF Function Groups exist, the Downmix Matrix is initially empty.

No routing is created automatically. You must explicitly define routing by enabling crosspoints.

To create routing:

1. Open the Downmix Matrix

2. Locate the desired Main Function Group row

3. Locate the target Fill or LF Function Group column

4. Enable the crosspoint at their intersection

Using Function Groups allows you to create routing relationships quickly without working beam by beam.

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Gain and Delay at Crosspoints

Each crosspoint in the Downmix Matrix supports:

• Gain

• Delay

These values are used to control the system‑level relationship between mains and fills or LF beams.

Editing gains and delays

In Plan, you can edit:

• Downmix routing (crosspoints)

• Crosspoint gain and delay

• System beam gains and delays

These system‑level values are exported and brought into Control.

In Control, you can edit:

• User‑level beam gains and delays

System values defined in Plan and user values edited in Control are separate and serve different purposes.

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Push and Pull Gain and Delay

The Downmix Matrix includes a push / pull mechanism that allows you to control where gain and delay are applied in the signal chain.

For each beam, open the three‑dot menu to access the following options:

• Push gains/delays to the matrix

• Pull gains/delays from the matrix

When using push or pull:

• Pulling gain or delay from the matrix to the beam level only has a meaningful effect when multiple crosspoints contain values.

• This effectively normalises the relationship, allowing common gain or delay offsets to live at the beam/matrix level while preserving relative differences between values.

This allows you to shift gain and delay between beam‑level and matrix‑level.

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Export and Persistence

Downmix routing is exported with the .holoplot file.

Downmix Matrix configuration persists when moving projects between Plan and Control, ensuring routing and system‑level tuning remain intact across environments.