Auto Tone Control (Tone)

On the UPO model, the TONE button is a sequencing (push-push) type switch that switches between predetermined frequency response curves and a manual mode (BASS & TREB controls functional). The following sequence occurs in a continuous loop configuration:
1. JAZZ
2. VOCAL
3. POP
4. ROCK
5. CLASSICAL
6. MANUAL

When you select a specific ATC mode with the TONE button, the ATC mode becomes the default. The ATC setting is stored along with the receiver preset frequencies. Selecting the preset frequency recalls the ATC setting.