Upsampling and filters

[Ermos (Erno)]

Perhaps we should reread this, and wait for the next chapter: Filtering in Digital Audio

dCS Ring DAC - A Technical Explanation

Part 5 – Filtering in Digital Audio Most DACs will have some information in their specifications about the types of filtering they use. As these filters are an incredibly important part of the product, it is worthwhile explaining why and how they are used. To understand why we need a filter, it helps to start at the beginning, when an analogue signal enters an ADC during the recording / production process. (This is significant, as the filter within an ADC has almost as much impact on what we h…