1.Locate the TF2 folder(or right on tf2, properties, local files, browse local files)
2.Click on the tf folder and then on custom
3.In the custom folder, create a new folder with any name
4.And in this folder which he called, however, create a folder (sound) and in the folder sound create the last folder named (ui) - (create the last 2 folders without parentheses I gave them to be visible what to enter)
5.Put the killsound ine the ui folder
Set advanced Killsound options to default. If you are downloading a file, export it to WAV format (for example, audacity). This is important because in killsound MP3 does not work. The second important thing is setting the frequency to 44100 Hz (44.1 kHz). It may be too quiet or too loud for you, so I recommend checking if this volume suits you. You can do it using a program such as wavepad sound editor, etc.