How to make iMac in Windows play sound through built-in speakers?

Question

Audio

There is an aimag bought in the middle of half a year. Worth at work. Due to the lack of iron resources for solidworks to work in a virtual machine, I had to install Windows. I put, of course, through the bootcamp, the seven. It was not possible to make a disk with drivers, as he initially suggested, there is no normal Internet in the office. After installing Windows with the help of devid.info, I started everything I needed - network, video, webcam, etc., but the sound does not start at all. It seems that I installed the driver found on the dev, but still there is no sound. There are no headphones / speakers at hand to check if there is sound in the jack.
The question is, has anyone experienced this? How to get sound in the built-in speakers of the iMac in Windows?

Answer 1

Download Bootcamp drivers at home.
BootCamp 5.0 for all MacBook 2012 (all models) or something similar.

Answer 2

maybe BigInteger and BigDecimal in Java.math package can help

Answer 3

BigDecimal one = new BigDecimal(99999999998l);
        BigDecimal two = new BigDecimal(1);
        one = one.add(two); // сложение
        System.out.println(one.round(new MathContext(3,RoundingMode.HALF_UP)));

output: 1.00E+11