Concerto is a browser-based audio player that processes your music in real time to simulate the acoustic character of a live concert venue — boosted low-end, spatial echoes, and controlled dynamics, all applied before your ears (and before export).
How it works
When you play a track, the audio passes through a chain of signal processors built with the Web Audio API. The same chain is applied when you export — the rendered file sounds identical to what you hear.
Effect chain
1
Bass boost
Shelving filter that lifts the sub-bass frequencies, adding the warmth and weight you feel in your chest at a live show.
2
Sub EQ
A narrow peak around 90 Hz adds body and punch — the resonant frequency that large PA systems reinforce in big rooms.
3
Room echo
Three spaced delay lines (70 ms, 140 ms, 210 ms) recreate the way sound bounces off the back wall, ceiling, and sides of a venue, giving the mix a sense of physical space.
4
Compressor
Evens out the dynamics so quiet passages don't disappear and loud transients don't overwhelm — similar to how a live sound engineer rides the faders.
5
Limiter
A hard ceiling at 95% of maximum volume prevents clipping, keeping the output clean no matter how much the chain amplifies.