Recording and analyzing sound

Hi @Gordon,

I am running with firmware 1v99.50 and trying run your example at https://www.espruino.com/Waveform

var w = new Waveform(1024,{doubleBuffer:true,bits:16­});
var a = new Uint16Array(1024);
w.on("buffer", function(buf) {
  a.set(buf);
  E.FFT(a);
  var m=0,n=-1;
  for (var i=100;i<500;i++)if(a[i]>n)n=a[m=i];
  console.log(m.toFixed(0)+"Hz @ "+n);
});
w.startInput(D2,1024,{repeat:true});

but have :
***Uncaught Error: Insufficient stack for computing FFT
at line 8 col 12

E.FFT(a);***

Is it possible to measure 500Hz frequency or we are restricted by the Puck's memory ?