AutoMix target gain for multiple speaking guests
Keeping several guests audible is as much a gain problem as a microphone problem. Lawo’s AutoMix, part of its Broadcast 3.0 ecosystem, automatically balances active voices, allowing the operator to focus on timing and content instead of constantly riding faders during a live panel.
Target gain provides the reference level for that balance. It is separate from a guest’s input trim, voice processing and the programme’s master volume, so understanding those boundaries is essential when several people share the studio.
Australian broadcasts often connect presenters and contributors across distances. A panel may link a host in Sydney, a guest in Melbourne and a caller from regional Queensland, making dependable speech levels as important as clear contributions from each location.
Why target gain matters in a live panel
Selecting a point within the adjustable target-gain range gives the automatic mixer a reference for the level it aims to deliver. It does not guarantee identical loudness for every syllable: accents, plosives, movement away from the microphone and changes in vocal effort still affect the result.
Think of it as the voice reference for the show. When another guest opens, gain sharing redistributes level between the active microphones; when that guest closes, the remaining voice can return towards the reference. Australian hosts often use a brisk, conversational delivery, with relaxed phrases such as “no worries”, so masking a quieter participant can remain surprisingly noticeable even when the overall mix seems consistent.
Setting a reliable speech baseline
Start with one host at the nominal setting, then add guests one at a time. Match microphones with input trim before relying on automatic mixing, and set the target against the programme bus rather than how loudly a performer feels beside the mic. Leave headroom for laughter, overlapping speech and stings.
Treat the available range as a calibration boundary, not a sound effect. Small, deliberate changes suit live speech better than chasing every fluctuation. In Australia, equipment sourcing involves specialist suppliers such as Atomic Bands, local integrators and service support, so availability and ongoing maintenance belong in the decision alongside acoustic performance.
Lawo’s account of Dutch radio deployment illustrates the value of workflows suited to reduced staffing, a common concern for Australian stations operating with lean production teams.
Adapting to overlapping conversations
The number of active voices changes constantly in a panel discussion. AutoMix can preserve a consistent overall speech level by attenuating active sources as more microphones open, but it cannot decide whether a particular interruption is meaningful. That remains a production judgement.
Keep the baseline steady while checking how guests behave together. Two clearly alternating speakers may need no target change; a crowded conversation may benefit from a small reduction. Make that adjustment only after checking microphone placement, input trim and the actual programme feed.
| Speaking situation | Target-gain approach | Automatic mixing behaviour | Operator check |
|---|---|---|---|
| One host speaking | Keep the established baseline | Maintains the chosen speech reference | Confirm input trim and microphone placement |
| Two guests alternating | Leave the baseline unchanged | Shares level as sources open and close | Listen for a level jump between speakers |
| Three or more guests talking | Consider a slightly lower baseline | Reduces the contribution of combined active sources | Check that no voice becomes buried |
| Guest with a quieter voice | Match with input trim first | Treats the guest against the same speech reference | Avoid compensating entirely with target gain |
Matching microphones, voices and acoustics
Target gain cannot repair a mismatch between microphones or rooms. A close microphone may sound disproportionately loud before automatic mixing even begins, while a distant guest may arrive quietly. Bring each source to a comparable speech level with input trim, then apply consistent voice processing without using compression to conceal poor matching.
Regional accents and different vocal habits should not be treated as errors to be levelled away. The job is to keep speech intelligible, not to make every speaker sound identical. In Australian studios, monitoring on the “cans” is familiar shorthand, but the headphone feed should still include the true programme balance rather than only a guest’s direct microphone.
Working across networked Australian studios
In a networked installation, the audio route matters as much as the mixer settings. Power Core nodes can carry programme audio between studio and remote locations, giving contributors a consistent reference instead of requiring each caller to guess the host’s level.
AutoMix should still manage the sources entering the same programme mix, with remote feeds checked for delay, polarity and accidental processing. A voice arriving from another city should not become a level outlier simply because it travelled a different path. Keep talkback and local headphone monitoring under control as well, or the presenter may make unnecessary corrections to an already balanced mix.
A practical routine for multi-guest broadcasts
Before the panel, establish one measured speech baseline and confirm that every microphone reaches it with a suitable processing approach. During the discussion, listen to the programme mix rather than chasing individual channels, and note whether the automatic balance becomes less comfortable when the number of speakers changes.
Make target-gain changes for programme-wide reasons, such as lowering the overall level for a crowded segment, and correct individual differences with input trim. In practice, a dependable mix comes from a measured baseline, microphones matched to it, and shared-gain adjustments reserved for changes that affect the whole mix.
