optimize sounds chapter after teach test

website/src/pages/workshop/first-effects.mdx

@@ -279,7 +279,7 @@ By the way, inside Mini-Notation, `fast` is `*` and `slow` is `/`.
 
 Instead of changing values stepwise, we can also control them with signals:
 
-<MiniRepl hideHeader client:visible tune={`sound("hh*16").gain(sine)`} punchcard />
+<MiniRepl hideHeader client:visible tune={`sound("hh*16").gain(sine)`} punchcard punchcardLabels={false} />
 
 <Box>
 

website/src/pages/workshop/first-sounds.mdx

@@ -195,7 +195,7 @@ It is quite common that there are many ways to express the same idea.
   client:visible
   tune={`sound(\`bd*2, ~ cp, 
 ~ ~ ~ oh, hh*4,
-[~ sawtooth]*2\`)`}
+[~ casio]*2\`)`}
   punchcard
 />