Follow these steps to make your sound like Alastor with Audacity Step 1. Make your audio file and upload it on the Audacity app. Step 2. Select the audio file and follow Effects > Equalization > AM Radio. Step 3. Now visit Effects again and set the High Pass Filter frequency at 700 Hz. Step 4. Choose Distortion and select the Walkie Talkie option value as 8. Step 5. Listen to the output, Your speech will be converted to classic Alastor voice.