Audio mixing, routing and channel manipulation

With DuME’s nodal view, it is very easy to route audio channels and mix them together.

For this work, the most useful nodes are:

• Mix: Mix any number of streams together,
• Split Channels: Split each channel from a stream into a separate mono stream,
• Join Channels: Join multiple mono streams into one multi-channel stream, and
• Downmix Downmix a multi-channel stream to a stream with less channels.

You may also use the Volume node to adjust individual stream levels.

Here are common examples of what you can do.

Downmix

DuME has a powerful Downmix node which can automatically and precisely donwmix any channel layout, to any other layout with less channels.
It can also create Dolby Pro Logic II and Binaural “stereo” streams from surround channels.

For example it can downmix:

• From Stereo to mono,
• From 5.1 surround to stereo,
• From 5.1 surround to Pro Logic II,
• From 5.1 surround to binaural,
• From 7.1 to 5.1,
• etc.

[Stereo / 5.1 surround / …] to mono streams

Using the Split Channels node, you can separate any channel from any stream to mono channels.
Just add the node, it automatically detects the layout of the input stream and exposes corresponding mono output streams.

Split a stereo stream to two mono streams.

Split a 5.1 stream to six mono streams.

Mono to [Stereo / 5.1 surround / …] streams

Using the Join Channels node, you can merge multiple mono streams in any single multi-channel stream.
Just add the node, select the output layour and connect the mono input streams.

Join two mono streams in a stereo stream.

Join six mono streams in a 5.1 stream.

Easily duplicate a single mono stream into a stereo stream.

Mix / Combine streams

Using the Mix node, you can combine multiple streams together. The number of channels and their layout is automatically handled, but if you have specific needs, it is easy to combine this node with the other nodes described here.

Mix multiple streams together in a single stream.

Each stream level can be adjusted in the properties panel of the node.

Complex combination

Here are a few examples of more complex stream combinations. In all cases, you can seperately adjust the level of all streams thanks to the Mix node

Mix both channels of two separate stereo streams together in a single mono stream, and use these as a new stereo stream.
This is just an example of how easy it is to manipulate channels, but you should never actually need this.

This is another example where all channels of two separate stereo streams are mixed together in a single mono stream,
which is then duplicated in a new stereo stream.

Switch channels

Use a Split Channels and a Join Channels node to switch channels.

You can use this trick with any channel layout.

Mute channel

Use a Split Channels and a Join Channels node to mute any channel.

The Front Right channel is muted.