Soundboard for Anodized Aluminum

[TScottW99]

I ordered some anodized aluminum today, will be my first time trying it as a call surface. It hit me after I ordered, I'm not sure what to use as a soundboard.

Anyone mind giving me a hint as to where I should start 

[outdoors]

I have a a variety of calls with a variety of sound board
Different sounds ,, experiment

[Sir-diealot]

I am working on a green anodized aluminum call, many suggested glass or crystal underneath for the soundboard.

[TScottW99]

I am working on a green anodized aluminum call, many suggested glass or crystal underneath for the soundboard.

Thanks! I was going to try glass first so glad I'm going down the right road.

[M,Yingling]

glass is most likely going make a sharper quicker running call ,,, slate will make it a bit more deeper sounding and throatier sounding call and over wood going make a hen sound that smokes 2 packs day 

[Sir-diealot]

glass is most likely going make a sharper quicker running call ,,, slate will make it a bit more deeper sounding and throatier sounding call and over wood going make a hen sound that smokes 2 packs day

Filtered or unfiltered?

[TScottW99]

glass is most likely going make a sharper quicker running call ,,, slate will make it a bit more deeper sounding and throatier sounding call and over wood going make a hen sound that smokes 2 packs day

Thanks!

Think I'll try glass in one and slate in the other and go from there.

Thanks gang!