Problem with SOUND noise waveform

If i type SOUND 2,800,50,,,,3 it makes 1 second of noise.

However if i use it in a programm i have the following problem :

100 SOUND 2,800,50,,,,3 : REM start noise flameshot

...

...

200 IF H=1 THEN SOUND 2,0,0 : REM stop noise if something is hit.

When i powercycle my M65 and start the programm line 100 does nothing the first few calls.

All other SOUND commands work first call. (other wavweforms)

IF i END and restart the programm it works at first call as long i don´t powercycle.

What i am doing wrong ?

Do i have to init the noise generator ?

It seems to be the same problem.

I tried a workaround.

10 VOL 0

20 FOR I=1 to 10

30 SOUND 2,800,50,,,,3

40 NEXT

50 VOL 10

It worked the first time after powercycle.

Second start the VOL 0 doesn´t work

I can live with it, since it doesn´t seem to be my fault.

This is for the core and ROM developers..

I switched to 6581 and it works now.