Capturing video on an iPhone often involves dealing with unpredictable ambient noise, wind interference, or competing background conversations. With iOS 18, Apple introduced Audio Mix, an advanced on-device machine learning audio processing suite that allows users to adjust and isolate vocal tracks directly within the Photos app after recording. By analysing spatial audio channels and voice frequencies, Audio Mix lets you sculpt video sound to achieve studio-grade clarity.
Understanding Audio Mix Sound Profiles
Audio Mix operates across four distinct audio processing modes, each calibrated for specific recording environments and acoustic needs:
- Standard: Retains the original captured audio profile exactly as recorded through the microphone array, without post-processing acoustic adjustments.
- In-Frame: Employs intelligent acoustic framing to isolate voices belonging to individuals visible on screen. Voices and distracting background noises originating off-camera are suppressed, making it ideal for street interviews and vlogs.
- Studio: Recreates the acoustic ambience of a professional recording studio with sound-dampening walls. Room reverberation and ambient room echo are removed, giving dialogue a crisp, close-mic quality.
- Cinematic: Treats captured sound like a cinematic film soundtrack. Dialogue is anchored firmly in the centre front soundstage while ambient room noises and environmental sounds are pushed outwards to preserve dramatic atmosphere.
Applying and Fine-Tuning Audio Mix in the Photos App
Audio Mix can be applied to any compatible video recorded with spatial audio on supported iPhone models. Follow these steps to adjust your video audio profile:
- Open the Photos app on your iPhone running iOS 18.
- Locate and tap on the video you wish to adjust, then tap Edit in the upper-right corner.
- In the editing interface, tap the Audio icon along the bottom toolbar.
- Swipe across the available profile cards to preview Standard, In-Frame, Studio, and Cinematic in real time.
- Once a profile is selected, use the Intensity Slider below the profile card to modulate the effect between subtle ambient reduction and maximum voice isolation.
- Tap Done in the upper-right corner to save your changes non-destructively.
Best Practices for Optimal Voice Separation
While Audio Mix performs impressive computational audio processing, recording with proper microphone positioning maximizes post-capture results. When shooting in windy outdoor conditions, ensure your subject speaks within reasonable proximity to the iPhone microphones to allow the machine learning models to map the fundamental vocal frequencies accurately.
Because adjustments in Photos are completely non-destructive, you can revisit any video at a later time, test alternate sound stages, or revert back to the original audio capture whenever needed.