![]() ![]() I hope that helps get you started (at least on the filtering part.) If you figure out how to write a real-time filter that can directly inject itself in to the Windows sound architecture, let us know. Some Google searching also turned up this resource: I would start by seeing what the open source programs do: Audacity is one: you can explore the equalization and audio filter plugins to see if they meet your requirements. So what you need to build is a programmable notch filter, then stack them to get as many bands as you need. A parametric EQ lets you set the specific frequency of each filter, and a good parametric EQ plugin will let you set as many or as few filters as you need. The best eq system is a set parametric eq's. Center your EQ on 1KHz (1000 Hz) and go up and down in factors of 2. In an abstract sense, a graphic equalizer is a set of notch filters, each one tuned to a specific frequency. ![]() ![]() Then you can click Equalizer to choose a preferred equalizer setting for Realtek audio. Then double-click RtkNGUI64 file to open Realtek HD Audio Manager. You can press Windows + R, type C:Program FilesRealtekAudioHDA in Run box, and press Enter. I can only offer some insight about the filtering part. Open Realtek Audio Manager to access Realtek equalizer. You didn't say whether your sticky point is creating the audio filters or injecting your audio in to the system's audio stream.
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