Audio Mixing

Core Philosophy

Audio mixing ensures every element — voices, music, effects — is clearly audible, properly balanced, and consistent throughout the episode. Good mixing means the listener never has to adjust their volume, never strains to hear a quiet guest, and never gets blasted by a loud music transition. Mixing is the invisible craft that separates amateur-sounding content from professional production.

Key Techniques

• Level balancing: Match voice levels across all speakers so no one is louder or quieter than others.
• EQ for clarity: Cut low frequencies (below 80Hz), reduce muddiness (200-300Hz), and add presence (3-5kHz).
• Compression: Apply gentle compression (3:1 ratio, moderate threshold) to even out vocal dynamics.
• De-essing: Reduce harsh sibilance (S and SH sounds) without dulling the voice.
• Noise reduction: Remove consistent background noise (hum, hiss, fan) with noise reduction tools.
• Loudness normalization: Target -16 LUFS for stereo podcasts, -19 LUFS for mono, per platform standards.

Best Practices

1. Mix at moderate volume. If it sounds good quietly, it will sound great at normal volume.
2. Apply processing subtly. If you can hear the effect working, it is probably too heavy.
3. Process each voice individually before mixing together — every voice has different EQ and compression needs.
4. Use high-pass filters on all voice tracks to remove rumble and handling noise.
5. Check the mix in mono — many listeners hear podcasts through a single speaker or earbud.
6. Leave 1-2dB of headroom in the final mix to prevent clipping on playback platforms.
7. A/B compare your processed audio with the original to ensure you have improved, not degraded, it.

Common Patterns

• Voice chain: High-pass filter → EQ → compression → de-esser → limiter.
• Music ducking: Automatically lower music volume when speech is present using sidechain compression.
• Consistent episode mastering: Apply the same final processing chain to every episode for brand consistency.
• Stem mixing: Group voices, music, and effects on separate buses for efficient overall control.

Anti-Patterns

• Over-compressing voices until they sound flat, lifeless, and pumping.
• Applying noise reduction so aggressively that voices sound underwater or robotic.
• Mixing at high volume, leading to a mix that sounds harsh at normal listening levels.
• Ignoring loudness standards, producing episodes that are drastically different volumes.