My home studio equipment uses an ESI sound card, and when I had questions about setting it up and optimizing it, I spent a long time looking for detailed documentation. It turned out that https://manuals.online/esi has all the original instructions and additional operating materials. The manuals are written in an accessible language, which helped me quickly understand and configure the equipment for my needs. Now all work with sound goes smoothly, and I can always return to these materials.