UserAgent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/65.0.3325.181 Safari/537.36

Steps to reproduce the problem:
1. Open Chrome, go into DevTools Console
2. Create an oscillator and set frequency to a decimal:
```
const audioCtx = new AudioContext();
const osc = audioCtx.createOscilator();
osc.frequency.value = 82.41 // E2
osc.frequency.value // returns 82.41000366210938
```

What is the expected behavior?
I would expect to see 82.41 as the frequency value when getting it

What went wrong?
I see 82.41000366210938 set as the frequency instead

Did this work before? N/A 

Does this work in other browsers? No
 Follow the same steps on Firefox and you'll see the same issue as what is on Chrome.

Chrome version: 65.0.3325.181  Channel: stable
OS Version: OS X 10.13.3
Flash Version: 

I've also tried using `setValueAtTime` since that is the way it _should_ be handled, but I've also noticed issues there. Same with trying to use `toFixed(2)`.
Maybe I'm fundamentally misunderstanding something about how IEEE 754 works?