Rewrite increase volume so that it takes two inputs: the sound to increase in volume and a filename where the newly louder sound should be stored. Then increase the volume and write the sound out to the name file. You might also try rewriting it so that it takes an input filename instead of the sound, so that inputs are both filenames.

What will be an ideal response?

```
def increaseVolume(filenameIn, filenameOut):
sound = makeSound(filenameIn)
for sample in getSamples(sound):
value = getSampleValue(sample)
setSampleValue(sample ,value * 2)

writeSoundTo(sound, filenameOut)
```