qrplay by nycki and SArpnt

a QR-code sized implementation of ZZT Play, which you may know from the ZZT Hall of Music.

I designed this because I wanted a program I could print on a business card, and SArpnt found some clever ways to shrink it even further. The version on this page is commented, the version in the QR code is minified.

paste ZZT music code in this box, then click the button to #play!

qrplay	Solfeggettio in C Minor
data:text/html,<meta%20name="viewport"%20content="width=device-width%20initial-scale=1.0"><textarea%20id=f></textarea><br><button%20onclick='/*qrplay%20v1,%20nycki%20&%20SArpnt,%202025*/v=f.value;T=[];Z=0;f.A=A=f.A||new%20AudioContext;B=new%20GainNode(A,{gain:0.4});B.connect(A.destination);for(i=o=k=t=0,l=1;c=v[i++],d=v[i],c;z<0?0:z>29?k=1:z>28?k=0:k?0:z>27?(T[Z]=t,Z=+v.slice(i,i+=2),t=T[Z]||0):z>17?t+=l:z<3?z?o+=g:(o=0,l=1/8):(console.log(z),z)&1?console.log(l=g):(a=new%20OscillatorNode(A,{type:`square`,detune:100*(g+o+(d==`%23`)-(d==`!`))}),a.connect(B),a.start(t*.4),t+=l,a.stop(t*.4)))g=[,-12,12,4,-9,2,-7,1,-5,.5,-4,.25,-2,1/8,0,l/3,2,l*1.5][z=`@-+wchdqeifsgta3b.x012456789z\npovukr\x27`.indexOf(c.toLowerCase())]'>%23play</button><button%20onclick='f.A.close();f.A=0'>%23stop</button>	;; title Solfeggettio ;; artist JS Bach @i-e!ce!g+ce!dc-bgb+dgfe!de! @ice!g+ce!dcdc-bagfe!d @ie!ce!g+ce!dc-bgb+dgfe!d @i+e!ce!g+ce!dcdc-bagfe!d @i+e!c-ge!c++c-ge!a!--fa!+cfa!+ce! @i+d-b!fd-b!++b!fdg--e!gb!+dgb!+d @i+ge!dc-ge!dh.c

qrplay v2a

we will rock you

for security reasons, your phone probably won't open these as links. you'll have to copy and paste the text into your browser's uri input.