Have a look at the source file below, a downloaded MP3 at 128 kbps.
I tried both Limiter (top) using +3dB amplification then Limiter, another +3dB amp then Limiter, a third +3dB amp then Limiter, and finally a +1 dB amp with Limiter.
Also tried a 8:1 Compressor (bottom) based on Peaks. The RMS values seem higher with Compressor.
Please comment on the pros and cons of these methods.
LevelSpeech2.NY plugin has the best of both worlds : it’s quicker than Audacity’s native compressor,
but unlike Audacity’s native limiter, it can have different attack & release times.