global sndWave=LoadSound("Data\sound\jet_loop.wav")
LoopSound sndWave 
global chnWave

global play
global start_play
global stop_play

while not keyhit(1)

if keyhit(28) then start_play = 1
if keyhit(57) then stop_play = 1

if start_play = 1 and play = 0 then
chnWave=PlaySound(sndWave)
start_play = 0
play = 1
end if

if stop_play = 1 and play = 1 then
StopChannel chnWave 
stop_play = 0
play = 0
end if

wend