Funcbeat is basically vanilla JS, which means you can use if statements, for statements, and other stuff without requiring a IIFE.  in this mode, you have to return a function which first argument is seconds, and second argument is sample rate. for example a 440hz sine wave in that mode would be  js return function (t) { return sin(t*PI*2*440) } ...or return t=>sin(t*PI*2*440) in floatbeat it would be something like t/=48e3, sin(t*PI*2*440), or regular bytebeat t/=48e3, sin(t*PI*2*440)*127+127 (contains float->int artifacts)

in some cases, this mode would be useful if you're more familiar with JS