Node Downsample 16Khz > 8Khz

downsample.js

// Downsample frames from 16Khz to 8Khz
function convert(message){
    var arr = []
    var x = 0;
    var y;
    var i;
    for (i = 0; i < 160; i++) { 
        y = x+2
        arr.push(message.slice(x,y))
        x += 4;
    }
    var data = Buffer.concat(arr);
    return data
}