Audio Compressor

Professional audio compression for dynamic range control.
Perfect for vocals, podcasts, instruments, and streaming content.
All processing happens in your browser - files are never sent to our servers.


Drag & drop MP3 file here
or click to select
Filename

Compressor Settings

Presets:
-12 dB
The level at which compression begins. When audio exceeds this level, compression is applied.
4:1
The amount of compression. 4:1 means 4dB of input becomes 1dB of output.
3 ms
How quickly compression responds. Fast attack tames transients.
250 ms
How quickly compression stops. Proper settings maintain natural sound.
2.5 dB
Transition smoothness. Soft knee provides more natural compression.
0 dB
Final output level adjustment. Compensates for volume reduction from compression.

Real-time Meters

Input Level
0
-10
-20
-30
-40
-∞ dB
Gain Reduction
0
-5
-10
-15
-20
-25
0 dB
Output Level
0
-10
-20
-30
-40
-∞ dB
Original Audio
00:00 / 00:00
Processed Audio (Real-time Preview)
00:00 / 00:00

Waveform Display

Original
Compressed
Auto-updating
Processing...

Frequently Asked Questions

Q: What is audio compression?

Audio compression reduces the dynamic range by making loud sounds quieter and quiet sounds louder. This creates more consistent volume levels and is essential for professional audio production.

Q: What do the settings mean?

• Threshold: The level where compression starts
• Ratio: How much compression is applied (4:1 means 4dB of input above threshold becomes 1dB of output)
• Attack: How fast the compressor reacts to loud sounds
• Release: How fast compression stops after the sound drops
• Knee: The smoothness of the transition at the threshold
• Output Gain: Final volume adjustment (-6dB to 0dB)

Q: Which preset should I use?

• Vocal: Gentle compression optimized for voice recordings
• Acoustic: Best for acoustic guitar, preserving natural dynamics
• Broadcast: Aggressive settings for consistent broadcast levels
• Custom: Manual control for specific requirements

Q: Why does the compressed waveform update automatically?

This tool provides real-time visual feedback as you adjust settings. The compressed waveform updates automatically with a slight delay to show how changes affect your audio. This helps you find the perfect settings before downloading.