Windows 8 Windows 8.1 built-in alarm clock sound

Hello

I just discovered that Windows 8.1 on a small Intel NUC and a touchscreen would make a nice device for the kitchen (o;

It also has a nice countdown timer built in where several timers can be started in parallel...

Oddly though....you can choose a limited set of alarm sounds for the alarm clock...but the sound for the countdown timer seems to be fixed....even changing the "notification" sound in preferences doesn't change it...

Any other way to change the sound of the countdown timer when it is finished from a sleepy chime to a harder ringing? (o;