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🔊 Sound Class & Menu Volume

Proximity voice is not a normal Sound Wave, it's a live stream, so Unreal gives you no obvious place to plug it into your audio settings. EPVC does: pick a Sound Class on the config asset and the voice becomes a classed sound like any other, so Sound Mixes, class volume and ducking all apply to it.

That's what lets you ship a Voice slider next to Master, Music and SFX.

1. Create the assets

In the Content Browser:

  1. Right-click → Audio → Classes → Sound Class, name it SC_Voice.
  2. Right-click → Audio → Classes → Sound Mix, name it SMIX_Options. This is the mix your settings menu will drive.

Tip

Parent SC_Voice under your existing SC_Master (open SC_Master and drag a connection) and the master slider will move the voice too, for free.

2. Assign it

In your ProximityVoiceConfig asset, under Playback:

Property Description
Voice Sound Class Sound Class the voice plays through. Empty = unclassed, the voice ignores your mixes.

Note

The class is read when a source starts, so a config swapped mid-sentence lands on the next talk burst. Same rule as Proximity Attenuation and Source Effect Chain.

3. Drive it from your options menu

A Sound Class on its own changes nothing, it only labels the sound. What moves the volume is either the class's own Volume property, or a Sound Mix targeting it. The second one is what a settings slider should use.

Once, at startup:

Push Sound Mix Modifier (In Sound Mix Modifier = SMIX_Options)

Then on every slider change:

Set Sound Mix Class Override
    In Sound Mix Modifier = SMIX_Options
    In Sound Class        = SC_Voice
    Volume                = <your slider value>
    Pitch                 = 1.0
    Fade In Time          = 0.1
    Apply To Children     = false

To drop back to the class defaults, Clear Sound Mix Class Override with the same mix and class.

Warning

The mix has to be pushed for the override to do anything. If your slider seems dead, that missing Push Sound Mix Modifier is the usual reason.

Note

This is local, it only affects the machine running it, which is exactly what you want for a settings menu. Nothing here is replicated.

Volume changes apply live, even while someone is mid-sentence, so you can drag the slider and hear it move.

4. Separate voice and radio sliders

The class comes from whichever config an emitter runs on, and a receiver can override the config with its own Output Configuration. Give that one a different class and the same speaker feeds two different sliders at once.

Asset Used by Sound Class
DA_NormalVoice The speaker's Default Configuration SC_Voice
DA_RadioReceiver The receiver's Output Configuration SC_Radio

The player then hears the same person at full volume from their mouth and at their own radio volume through the intercom, controlled independently.

5. Quick sanity check

Not sure the class is really applied? Open SC_Voice, set its Volume to 0.15, and talk. If the voice drops, the routing is good, put it back to 1.0 afterwards. This costs no Blueprint at all and rules out a wiring mistake in your menu.

Note

A player never hears their own voice, so run the check on the machine that listens, not the one that talks.

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