Volume Control

Getting the audio mix right can make or break a video. StarZero Agents gives you straightforward volume controls on every clip — both video clips and separate audio clips — so you can balance everything to sound exactly the way you want.

Adjusting Volume

You can set the volume on any clip by asking in the chat:

"Set the volume of the background music to 30%"

"Turn up clip 2 to 150%"

"Lower the narration volume to 50%"

The volume range goes from 0% (completely silent) all the way up to 200% (double the original volume). The default is 100%, which is the original level.

Muting and Unmuting

Sometimes you want to silence a clip without removing it. You can mute and unmute any clip:

"Mute clip 3's audio"

"Unmute the background music"

Muting is handy when you're experimenting with your mix and want to hear what things sound like without a particular clip playing.

Video Clip Audio

Every video clip has its own audio — the sound that was recorded with the footage. You can adjust the volume or mute it entirely:

"Set clip 2's audio to 50%"

"Mute the audio on clips 2 and 4"

"Turn up clip 1's audio to 150%"

Setting the volume to 0% is equivalent to muting the clip. This is useful when you want to keep the visuals from a clip but replace its audio with music or narration instead.

Using the Visual Editor

If you prefer a hands-on approach, you can adjust volume directly in the visual editor. Both video clips and audio clips have a volume slider you can drag to set the level — open a clip's context menu (the "..." button) to access it. This gives you a quick, visual way to make adjustments without typing in the chat.

Volume Keyframes

Sometimes a flat volume level isn't enough — you might want music to fade in at the start, dip under narration, or fade out at the end. Volume keyframes let you change the volume at specific points within a clip — both audio clips and video clips.

"Add a fade-in to the background music over the first 3 seconds"

"Duck the music volume to 20% between 10 and 15 seconds, then bring it back to 100%"

"Fade out the audio clip at the end"

Each keyframe has a time (position within the clip) and a volume level. You can also control how the volume transitions between keyframes. The interpolation type on a keyframe controls the transition from that keyframe to the next one:

• Smooth (default) — natural, gradual transition to the next keyframe
• Linear — steady, constant-rate change to the next keyframe
• Hold — volume stays at this level until the next keyframe, then jumps instantly

To remove keyframes and go back to a flat volume level, just ask:

"Remove the keyframes from the background music"

Editing Keyframes in the Visual Editor

When a clip has keyframes, an orange volume envelope is drawn over the clip so you can see the shape of the volume curve at a glance. For audio clips it's drawn over the waveform; for video clips it appears along the bottom of the clip. You can add, adjust, and remove keyframes directly from the editor:

• Add a keyframe — open the clip's context menu (the "..." button) and choose Add at playhead. The playhead must be positioned over the clip.
• Select a keyframe — click one of the orange dots on the envelope. The dot turns blue when selected.
• Drag to adjust volume — click and drag a selected keyframe dot up or down to change its volume level. A tooltip shows the current value as you drag.
• Change the transition type — with a keyframe selected, open the context menu and use the Linear / Smooth / Hold toggle to pick how the volume moves from that keyframe to the next one.
• Adjust volume precisely — use the volume slider that appears in the context menu when a keyframe is selected.
• Remove a keyframe — select the keyframe, open the context menu, and choose Remove selected keyframe.

When keyframes are present, the clip's overall volume slider is replaced by per-keyframe controls.

Tips for Getting a Good Mix

• Background music usually works best at 20-30% volume so it doesn't compete with dialogue or narration.
• Narration and dialogue are typically your primary audio, so keep them at 80-100%.
• Use keyframes to duck music under dialogue — drop the music volume during speech and bring it back up in between.
• Fade in and out with keyframes for smoother transitions instead of abrupt starts and stops.
• Mute video clip audio when you want clean music or narration without background noise from the original footage.
• Preview your project after adjusting levels to make sure everything sounds balanced together.

What's Not Supported

StarZero Agents keeps audio controls simple and effective. There are a few things that aren't available:

• EQ or equalization — there's no way to adjust bass, treble, or frequency ranges
• Pitch shifting — you can't change the pitch of audio clips

Background noise is a different story: speech separation lifts the voice away from background noise and music, and its voice enhancement option removes echo and room sound.

For most video content creation, the volume controls, keyframes, and mute toggles give you everything you need to create a clean, professional-sounding mix.