Setting Tone, Bass, Treble for SB Live

Best: Just disable tone control and output sound cleanly. In alsamixer, mute item "Tone" and it will say "Item: Tone [Off]".

If you want tone control, unmute. Adjust Bass and Treble sliders. Set slider=20 for closest value for pure tone. With tone control on, the volume is weaker and I need to pump up the volume some more on the Denon.