Best Audio Settings for Podcast Cleanup — A Beginner's Guide

One of the most common frustrations for new podcasters is the gap between what their recordings sound like and what professionally produced shows sound like. The voices on popular podcasts feel warm, present, and clear — yours might sound a bit flat, a bit boxy, or a bit noisy. That gap is almost entirely down to audio processing, and it's completely closable.

This guide covers the key processing steps that make podcasts sound polished, explains what each one actually does, and tells you the settings that work well for most voice recordings.

What Makes Podcast Audio Sound Professional?

Professional podcast audio has a few defining characteristics: it's consistent in volume, it feels intimate and present without being harsh, it has no distracting background noise, and it's easy to listen to for a long time without fatigue. None of these qualities come from the microphone alone — they come from the processing chain applied after recording.

The good news is that the processing chain is well understood and doesn't require expensive tools. The same techniques professional engineers use are available in free browser-based tools like VoxBoost AI.

Step 1: High-Pass Filter — Remove the Rumble

The first thing to apply is a high-pass filter, which cuts everything below a certain frequency. For podcasts, set the cutoff around 80–100 Hz. Below that point, there's very little voice content — just low-frequency noise from HVAC, traffic, desk vibrations, and handling noise.

Removing these frequencies doesn't make the voice sound thin — in fact, it often makes it sound cleaner and more focused. The ear perceives clarity differently from fullness, and a well-applied high-pass filter delivers both.

Step 2: Noise Reduction — Clean the Floor

Once the low end is tamed, broadband noise reduction tackles the hiss and hum that sits across the rest of the spectrum. The goal isn't to remove 100% of all background sound — aggressive noise reduction introduces warbling artefacts that sound worse than light hiss. Aim for enough reduction to make the noise inaudible, not to get a reading of absolute silence.

A noise reduction of around 10–18 dB is usually the sweet spot for home recordings. This brings background noise well below audible without degrading the voice.

Step 3: Compression — Consistency Is Everything

Compression is what makes podcast voices sound smooth and consistent. It automatically reduces the dynamic range — bringing loud peaks down and raising quiet passages up — so the listener doesn't have to constantly adjust their volume.

For podcasts, a medium ratio (around 3:1 or 4:1) with a medium attack (5–10 ms) and a slightly longer release (80–150 ms) works well for most voices. Set the threshold so the compressor is working for maybe 6–10 dB of gain reduction on your louder words. Keep the overall gain make-up so the average level sits around -16 to -18 LUFS, which is the standard loudness target for most podcast platforms.

Step 4: De-essing — Tame Harsh Sibilance

Sibilance is the sharp, hissing quality of S and SH sounds that can become fatiguing in headphone listening. A de-esser is a frequency-specific compressor that targets the 5–10 kHz range where sibilance lives and automatically reduces it when it spikes.

Not every voice needs heavy de-essing, but it's worth checking. Record a test clip and say several words with S sounds — "surprise", "consistent", "session" — and listen back on headphones. If those S sounds feel sharp or piercing, a gentle de-esser will smooth them out significantly.

Step 5: Noise Gate — Silence the Gaps

A noise gate closes the microphone signal when you're not speaking, which removes residual noise in the pauses between words and sentences. Even after noise reduction, these gaps can carry a faint hiss that adds up over a long episode.

Set the gate threshold just above the level of your noise floor — high enough to catch the noise, low enough not to cut off the ends of words or quiet intakes of breath. When set well, it's invisible to the listener but noticeably cleans up the overall feel of an episode.

Step 6: EQ for Voice — Presence and Air

After compression and noise processing, a gentle EQ pass adds the final shine. Boost around 3 kHz for forward presence and speech intelligibility. Add a small high-shelf lift around 10–12 kHz for openness and "air." If the voice sounds boxy or honky, look for the culprit in the 300–500 Hz range and make a narrow cut there.

Using VoxBoost AI for Podcast Prep

If you record interviews or solo episodes and want to clean up the audio before publishing, VoxBoost AI handles the complete processing chain in one place. The high-pass filter, noise reduction, compression, and EQ all apply simultaneously, and you can hear the result in real time before committing to a recording.

For regular podcasters who want more control over individual settings and the ability to process longer recordings, the Premium plan unlocks extended session time and additional processing options specifically designed for podcast workflows.