Is there a more automated way to control narration volume vs. background music volume

[Panorama]

Currently, I have instrumental music (using midi and instruments) that should have lower volume when there is "talking" and then the music should have more volume when there is no talking. Currently, it is a painstaking process of detecting when there is narration and lowering the musical track's volume at that interval. This is a long shot question and I don't expect reason to have a tool to deal with that, but I decided to ask anyway.

[Loque]

Side chain compression. The narration is the side chain signal, everything else is in the compressed channel.

And a side note as moderator. Do not create multiple threads for the same problem.

[crimsonwarlock]

It's called 'ducking'. Just search YouTube for 'voiceover ducking', there are a bazillion videos on the topic.

[PhillipOrdonez]

Free vst, Nova by TDR, is an equaliser that can be dynamically activated by another track and duck the frequencies of your choice. On the Nova's display you can choose to view the sidechained signal spectrum and adjust the bands accordingly to the narrator's range. That way there will be a space carved for the voice when it comes on but it doesn't take away all of the music as it would by doing the usual ducking compression which would reduce full spectrum and often sounds jarring, which may not be the desired effect. So you got options.

[huggermugger]

Ducking is easy with Reason's mixer and built-in dynamics.

1. Output all the instrument tracks to a Bus.

2. Flip the rack, and patch the Parallel Out from the Voice track to the Sidechain input of the Instrument Bus. Activate the blue "Key" button (it might already be on).

3. Flip the rack again, and locate the Compressor on the Instrument Bus. Make sure it's turned on, and the Key is active. Now, adjust the Compressor so that it responds to the Voice (start by reducing the Threshold).