stdin issues

gistfile1.js

#!/usr/bin/env node

var Audio = require('./lib/audio'),
  argv = require('optimist')
  .options('i', { alias: 'input', })
  .options('o', { alias: 'output', })
  .argv
  ;

var a = new Audio();

var cb = function (err, res) {
  if (err) {
    console.error(err);
  }
  else {
    res.pipe(process.stdout);
  }
};

console.log('hi');
process.stdin.resume();
a.slowDown({ speed: .5}, process.stdin, cb);