Recording and analyzing sound

Hi @Gordon,

Yes recording in 8 bits is reasonable.

I would like to send the clip to the client. I have following questions based on the code:

var soundBuff;
NRF.setServices({
  0xBCDE : {
    0xABCD : {
      value : "N/A",
      readable : true,   // optional, default is false
      writable : true,   // optional, default is false
      notify : true,   // optional, default is false
      onWrite : function(evt) { // optional
        var clipSeconds = evt.data[0];
        var w = new Waveform(512*clipSeconds,{bits:8});
        w.on("finish", function(buf) {
          soundBuff=buf;
          NRF.updateServices({
            0xBCDE : {
              0xABCD : {
                value : buf,
                notify: true
              }
            }
          });
        });
        w.startInput(D2,512);
      }
    }
  }
});

1. Is this the right way of doing this ?
   
2. How can I free memory once the data is sent to the client ?
   
3. How can I view the result with "nRF Connect"
   
   

Thank you.