Music Production
Estimate gain reduction and makeup gain for compression settings.
Account for ratio and knee width when matching levels.
Compression reduces the volume of loud parts of an audio signal based on a threshold setting, controlling peaks and creating a more consistent output level. However, this reduction lowers the overall loudness of the compressed signal. Makeup gain compensates for this reduction by amplifying the compressed output back to the original loudness level, restoring perceived volume while maintaining the compression's tonal benefit. The compressor makeup gain calculator determines the exact gain boost needed, measured in decibels (dB), to match the input and output levels, ensuring that compression benefits tone and control without sacrificing loudness.
The calculator analyzes the compression ratio (4:1, 8:1, etc.) and the amount of gain reduction applied to determine the net loudness loss. It then recommends a makeup gain value that restores the overall signal to its original level. The tool displays before/after waveform comparisons showing how makeup gain interacts with reduced peaks, creating a controlled signal that maintains the compression's benefits while preserving audibility. Proper makeup gain is essential for fair A/B comparisons between compressed and uncompressed versions.
Makeup Gain (dB) = Average Gain Reduction (dB). If a 4:1 compressor reduces peaks by 12 dB on average, apply +12 dB makeup gain. More simply: Makeup Gain = Threshold - Output_Level after compression. Ideal setting matches input RMS level to output RMS level, maintaining loudness while preserving compression benefits.
Makeup gain is necessary only if you want to maintain output loudness relative to input. On individual tracks where you're shaping tone, makeup gain ensures the compressed sound isn't quieter, making fair comparison possible. On buses and master track compressors, makeup gain helps maintain overall mix level. On creative applications (sidechain compression, heavy pumping), skipping makeup gain is intentional for dynamic effect.
Use your DAW's gain plugin or metering: compress audio, then measure the RMS level before and after. If compression reduces the RMS from -5 dB to -12 dB (7 dB reduction), apply +7 dB makeup gain to restore it to -5 dB. Alternatively, listen critically and adjust makeup gain until the compressed version sounds equally loud as uncompressed; trust your ears.
Excessive makeup gain re-amplifies everything, including the quieter parts that weren't affected by compression threshold. This reduces compression's leveling benefit and can make pumping or artifacts more obvious. Set makeup gain so only the peak reduction is restored, not all content; the quieter material should remain at its original level without amplification.
Yes, significantly. Makeup gain on master compression raises the overall loudness of the entire mix. Ensure makeup gain is set precisely: it should restore output to input level, not exceed it. This maintains the compressor's dynamic control without artificially boosting the mix. In mastering, this precision is critical for meeting loudness standards (LUFS targets) and avoiding over-compression artifacts.
