Playing wav files simultaneously on Uno

Hello guys,
I need some help. :slight_smile:

I can read WAV files from SD with the arduino, and play them. I've connected the buttons on an analog input. I got ten button on two analog channels (So five for each!). It all works! Although I got one problem. It plays small samples, and it has to do them simultaneously. For now I can play one sound, when it's finished then it reads for new input, then you can press the button again to play another sound.
I would like to play the sound, while it looks for another sound. How to fix this problem?


Thanks in advance!

Allegedly reading more than one file from an SD card and playback through PWM

But I have not tried this.

Alleged video of such.