Vox ToneLab ST Owner's Manual page 14

根据混响旋钮的位置不同，可以选择不同的混响类型（SPRING，ROOM 或者 HALL）
并且调节混响声音的混合数量。
5. Program Select / Tuner section
5、编程音色选择/调音器部分
a. UP/DOWN pedals and LEDs
Selecting a program (p.9, "Trying out the programs")
Pressing the UP pedal will increment the program by one, and pressing the
DOWN pedal will decrement the program by one.
You can hold down the UP pedal and press the EXIT/TUNE key to increment
the program by ten.
You can hold down the DOWN pedal and press the EXIT/TUNE key to decrement
the program by ten.
a. 上下按键（或踏板）[UP/DOWN]和 LED 指示灯
选择一个编程（参阅"体验编程音色"部分）
点击上按键会向上递增一个音色，点击下按键会向下递减一个音色。
你可以按住上按键并且点击 EXIT/TUNE（退出/调音）按键向上递增十个编程音
色。
你可以按住下按键并且点击 EXIT/TUNE 按键向下递减十个编程音色。
Using the tuner (p.23, "Tuner")
If you press the UP and DOWN pedals simultaneously, all effects will be
bypassed and you'll be able to use the tuner.
If you hold down the UP and DOWN pedals simultaneously for about two
seconds, you'll be able to use the tuner with the sound muted.
When you're using the tuner, the LEDs will indicate the tuning status.
使用调音器（参阅"调音器"部分）
如果你同时点击上下按键， 所有的效果都会被忽略， 你就可以进入到调音器功能。
如果你同时按住上下按键大约两秒钟，你就可以使用无声的调音器。
当你使用调音器的时候，LED 指示灯会指示调音的状态。