How to add voiceover to videos without a microphone

Write and generate audio first

Draft narration in MachenVoice blocks, preview the playlist, and export one MP3. Finish wording before you cut video so you are not chasing timing while sentences still change.

Keep music and sound effects out of the TTS script. Generate dry voice, then mix in the editor where you can duck music under speech.

CapCut (desktop or mobile)

Import your video and the MachenVoice MP3. Drag the audio track below the video, align the first sentence to the opening frame, and split the clip if you need to slip individual phrases.

Use CapCut’s auto-captions on the final mix if you publish to TikTok or YouTube Shorts. Captions help viewers watching muted.

Adobe Premiere Pro

Create a sequence matching your delivery resolution. Import the MP3, place it on an audio track, and use markers on the beat where sections change.

Apply the Essential Sound panel “Dialogue” preset lightly if needed, but avoid heavy compression before you know the platform loudness target.

DaVinci Resolve

On the Edit page, add the MP3 to an audio track. Use the Inspector to adjust clip gain before you jump to Fairlight for fine tuning.

In Fairlight, bus dialogue to a dedicated track, high-pass around 80 Hz if room rumble appears, and export with your video from the Deliver page.

Sync tips when video is already cut

If video came first, place the playhead at each cut and split the narration clip to match. It is faster than time-stretching speech unless you only need a minor trim.

When pacing feels rushed, edit the script in MachenVoice and regenerate the block instead of speeding up audio in the NLE.

Export settings for social vs long-form

Social platforms often normalize loudness on upload. Keep dialogue peaks conservative (-6 dBFS peak is a common starting point) and let the platform limiter handle the rest.

Long-form YouTube tolerates wider dynamic range, but viewers on TVs still appreciate consistent level across scenes.

Rights before you publish

MachenVoice does not grant YouTube monetization rights. Confirm third-party neural TTS terms and your platform’s synthetic-speech rules before you enable ads or sell the video.

Disclose synthetic narration in the description when your audience expects transparency; some platforms ask whether voice is AI-generated during upload.

Fixing sync problems

If narration leads video, slip the audio track a few frames at a time rather than stretching time. If a section is too long, trim pauses in the NLE or shorten the script and regenerate that block only.

For jump cuts on TikTok, align the first word of each clip to the visual beat; split the MP3 at those beats in CapCut instead of regenerating the whole project.

Music beds and ducking

Keep music at least 12–18 dB below dialogue during speech. Use sidechain compression or manual volume keyframes; do not bake music into the MachenVoice export.

Royalty-free beds with steady midrange mask TTS less than busy percussion. Preview the mix on phone speakers before export.

Batching shorts from one script

Write one MachenVoice project for the full voice track, export MP3, then slice in the editor per short. This keeps voice timbre consistent across a series.

Add unique hooks in block one per short if you regenerate; otherwise reuse slices from a master narration file.

Screen recordings and picture-in-picture

Record your screen first at the pace you can comfortably demonstrate, then write narration to match cursor movements. It is easier to trim video than to time-stretch speech.

In Camtasia or OBS-based workflows, place MachenVoice MP3 on a dedicated track and mute the system audio unless the demo requires application sounds.

Replacing a bad take without a microphone

When one sentence sounds wrong, edit that block in MachenVoice, regenerate, and splice the new clip in your NLE. Crossfade five to ten milliseconds at the cut to hide breath mismatches.

Keep a backup export before splicing so you can revert if the new take changes pacing for the whole paragraph.

Accessibility on social video

Burned-in captions help muted viewers; auto-caption tools work best when your MachenVoice script matches what you actually exported. Upload the script as a starting point when the platform allows it.

For YouTube, add a chapters file after upload; spoken transition phrases in your script make chapter boundaries easier to mark.

Noise cleanup after export

MachenVoice exports dry speech. If you hear hiss, apply light denoise in your DAW rather than re-generating with different punctuation. Aggressive denoise can make neural voices sound metallic.

Export a lossless intermediate only if your editor requires it; MP3 is fine for social delivery after one careful listen on earbuds.

Collaboration with editors

Share the script doc and block IDs with your video editor so they can request regeneration without guessing which paragraph changed. Timecode notes (“regenerate block 3”) beat vague feedback (“fix the middle”).

When working async, upload the MachenVoice MP3 to cloud storage with version numbers; avoid emailing attachments that get renamed by mail clients.

Hardware you still need

You do not need a vocal booth, but you do need headphones to catch plosives and sibilance that laptop speakers hide. A quiet room helps you judge pacing, even though the voice itself is synthetic.

If you stream while editing, mute notifications so you do not misread whether the glitch came from TTS or from your system audio.

File naming for client delivery

Deliver `projectname_vo_v2.mp3` with a readme listing MachenVoice voice ID and export date. Clients appreciate knowing which script version matches the audio when they request a pickup line weeks later.