[tkam]

Nice! One problem: There's digital clipping. I suspect that the four samples are normalized individually, and when playing at the same time the transients add up to over 0dB. On quality headphones (beyerdynamic dt770 for me) it is quite audible. It happens with the piano and the synth sample, but is more audible with the piano sample.

[codazoda]

Is that the sort of "scratch" or "crunch" I hear from my Sennheiser HD 4.50's or is it something else?

At first, I didn't even notice it, but now I went back to listen more carefully. I'm not sure if my headphones are "quality" or not but they are the most expensive set I've ever owned.

I hear no clipping (like sudden silence) at the end of notes, even if I wait a long time. But, my ears are not tuned.

[IAmGraydon]

Additive digital clipping would be happening in your device. You should be able to resolve it by turning your OS volume down. This website could use a volume slider for each voice, though.

[vanderZwan]

> You should be able to resolve it by turning your OS volume down.

It doesn't resolve it, the clipping happens in the audio generation before the OS does anything with it.

[breakfastduck]

Clipping can occur at any gain stage, not just the final output