Well, I made a soundboard with Appyet, just create a web module and add the following
<button class="btn btn-info btn-lg" onclick="document.getElementById('STRINGOFYOURCHOISE').play()">some button text</button></p>
And then you have to include the sound itself, in my case I have decoded it to base64 so I can paste it directly into the site in appyet, but you can also host your file somewhere:
<audio id="STRINGOFYOURCHOISE" src="data:audio/mp3;base64,THEBASE64CODEITSTOLONGTOPASTEITHERE"/>
You can as many of this buttons as you want, just always change the id.
PS: it can crash appyet if you copy more than 4 sounds
I know it !