direct digital synthesis

Direct Digital Synthesis is like playing with Legos to make different tunes.

Imagine you have a big pile of Legos of different shapes and colors. To make a tune, you can take out and put together different Legos in different ways to create different sounds. Similarly, Direct Digital Synthesis uses a digital signal processor (DSP) to take small pieces of data, called samples, and put them together in different ways at a very high speed to create an electrical signal that can be turned into sound by speakers or headphones.

But, why do we need Direct Digital Synthesis? Well, before DDS, people used an analog method called Voltage Controlled Oscillator (VCO) to create electrical signals that can be turned into sound. VCOs were not as accurate as DDS and could not change the frequency of the signal as quickly. DDS allows for accurate and fast frequency changes, which is really important in applications like wireless communication and audio equipment.

So, in summary, Direct Digital Synthesis is like playing with Legos to create different electrical signal frequencies that can then be turned into sound.