analmux Posted January 18, 2015 Share Posted January 18, 2015 Maybe some people here remember the PoKey 'distortion guitar'. It starts at 2:18 of the following video: Here is a simple atari basic test to play with the possibilities of the distortion guitar. It's very curious that, using 16-bit mode, voice 2 is silent and voice 1 not. Push START for smooth left modulation of the poly9 state Push SELECT for smooth right modulation of the poly9 state Push START + OPTION to change note downwards Push SELECT + OPTION to change note upwards 10 P=53760:Q=53279 20 POKE P+8,208:POKE P+1,132 30 R=20 40 PITCH=R*511-7 50 PH=INT(PITCH/256):PL=PITCH-PH*256 60 POKE P,PL:POKE P+2,PH 70 S=PEEK(Q):IF S=7 THEN GOTO 70 80 IF S=6 THEN POKE P+2,PH+1:GOTO 130 90 IF S=5 THEN POKE P+2,PH-1:GOTO 130 100 IF S=2 THEN R=R+1:GOTO 40 110 IF S=1 THEN R=R-1:GOTO 40 120 GOTO 60 130 FOR T=0 TO 49:NEXT T:GOTO 60This sounds curious. Does anyone have an idea how this works? 3 Quote Link to comment Share on other sites More sharing options...
analmux Posted January 26, 2015 Author Share Posted January 26, 2015 (edited) Here's a small modification and an easy download: Using BASIC or TURBOBASIC, you can type: LOAD "D:DG16.BAS" TEST2015.ATR Edited January 26, 2015 by analmux Quote Link to comment Share on other sites More sharing options...
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