How to Improve Zoom Audio Quality (Recording Cleanup Guide)

Zoom and other video conferencing tools apply heavy audio processing during calls: compression, noise suppression, and bandwidth-limited codecs. The resulting recordings often sound compressed, muffled, or noisy. This guide shows you how to clean up Zoom recordings and improve audio quality for replays, repurposing as podcast content, or archiving.

Understanding what Zoom does to your audio

Before trying to fix Zoom audio, it helps to understand what you are dealing with:

Codec compression: Zoom uses the Opus codec, which operates at relatively low bitrates to minimize bandwidth. This introduces compression artifacts that affect the upper frequency range, sometimes making voices sound slightly “processed” even in ideal conditions.

Automatic noise suppression: Zoom applies its own noise suppression during calls. This can create artifacts, particularly when background noise levels change rapidly. Paradoxically, Zoom’s built-in suppression sometimes introduces more problems than it solves for recordings intended for distribution.

Automatic gain control: Zoom continuously adjusts recording levels, which can cause level pumping when noise levels change.

Echo cancellation: The echo cancellation algorithm occasionally affects voice character, particularly when multiple people are talking in the same room.

Getting better source recordings

If you record Zoom calls regularly for podcast content, onboarding videos, or business content, there are ways to improve quality at the source:

Disable Zoom’s built-in noise suppression when you intend to post-process the audio. Go to Audio Settings > Advanced and set Background Noise Suppression to “Disable.” You will handle noise removal in post with better tools like Noise Remover.

Use local recording rather than cloud recording when possible. Local recordings preserve more audio fidelity than cloud recordings, which go through Zoom’s servers and additional processing.

Ask participants to use headsets: a headset microphone keeps the mic close to the mouth, picking up much more voice and much less background noise compared to laptop microphones.

Record with Zoom’s separate audio track option: in the recording settings, enable “Record a separate audio file for each participant.” This gives you individual tracks per participant for much more flexible post-processing.

Cleaning up Zoom recordings in post

For existing recordings, cleaning up Zoom recordings follows a similar process to other voice audio.

Step 1: Remove background noise

For Zoom recordings that were made with Zoom’s noise suppression disabled, or for recordings that still have noticeable background noise despite suppression:

1. Open Noise Remover in your browser
2. Upload the audio file (extracted from the Zoom recording, or the audio file directly)
3. Process and download

Since processing happens entirely in your browser, there are no privacy concerns with confidential meeting recordings.

Step 2: Address codec artifacts

Codec compression artifacts are difficult to fully reverse, but a gentle high-shelf EQ boost (around 8-12 kHz, +2 to +3 dB) can restore some brightness and presence to compressed audio. This partially compensates for high-frequency loss from the codec.

Step 3: Level normalization

Zoom’s automatic gain control sometimes creates inconsistent levels across a recording. Normalize the audio to a consistent target, or use compression (3:1 ratio, moderate attack and release) to even out level variations.

Step 4: Reduce room echo (if present)

If participants recorded without headsets in echoey environments, dereverb processing can help. Apply conservatively. Over-processing creates an unnatural “dry” quality.

Extracting audio from Zoom recordings

Zoom recordings are saved as MP4 files. To extract the audio:

On Mac: Open in QuickTime, go to File > Export As > Audio Only (saves as M4A)

On Windows: Use VLC: Media > Convert/Save, select the MP4, choose audio-only output format

Online: Use a browser-based tool or ffmpeg:

ffmpeg -i zoom_recording.mp4 -vn -acodec pcm_s16le output.wav

WAV format gives you uncompressed audio for best processing quality.

Realistic expectations for Zoom audio

Even with careful post-processing, Zoom recordings will not match the quality of dedicated podcast recordings. The codec compression introduces losses that cannot be fully recovered. However, you can expect:

• Significant reduction in background noise and hiss
• Improved speech clarity and presence
• More consistent levels across the recording
• A more polished result suitable for distribution

For regular content creation from video calls, consider supplementing Zoom with a local recording tool (Audacity, QuickTime) running simultaneously, so you have a higher-quality audio backup.

Start with Noise Remover for a quick, free improvement to your Zoom recording quality.