Acetronics,

I'm not sure to understand your remark.

I tried this:
SOUND Speaker,[Vsnd(A),10]
and
SOUND Speaker,[Vsnd.0(A),10]
and
SOUND Speaker,(Vsnd[A],10)
and
SOUND Speaker,(Vsnd.0[A],10)

In fact, I get a sound but it is a much lower frequency than compared to when I play the sound like SOUND Speaker,[121,10].