🚀 go-pugleaf

let's say I have a sample that I am playing using the method described in 
the hardware ref. manual. (direct mem access .).
I am doing everything ok,  the sample is playing in an infinite loop maneer.
I know how to turn that off . But I want to turn that off after it hasplayed
exactly only once. THe manual says to use the interrupts (there is one that 
goes off when audio block is done) the int. in questions are : 
Intena and intenreq. I have tried to set them .(Set+audio0). but nothing
happens. the infinite loop is still there. How does it work ? 
any magic number to poke somewhere ? 
no I dont want to use the cumbersome method given in the RMK. (that's overkill
for some stupid sample.)

dw.