What is 512 2?

512 2 can refer to several things:

1. As a decimal number, 512 2 is equivalent to 2^9, or 512 in base 10.

2. In computer science and digital electronics, 512 2 represents a binary number consisting of 9 digits, all of which are either 0 or 1. It can be written as 100000000 in binary form.

3. In music production and sound engineering, 512 2 might refer to a specific type or model of equipment, such as a digital audio interface or a synthesizer.

Without more context or information, it is difficult to determine exactly what 512 2 refers to in a particular context.