If you start blasting a sine wave to a speaker, you get overtones at the very start as the speaker snaps into position (like a square wave). You can avoid this by ramping the gain up from zero. Vail does that, but it's doing it too quickly, because you can still hear popping.
If you start blasting a sine wave to a speaker, you get overtones at the very start as the speaker snaps into position (like a square wave). You can avoid this by ramping the gain up from zero. Vail does that, but it's doing it too quickly, because you can still hear popping.