The control scheme is good. The rubberized buttons are raised from the surface of the speaker, and they're clicky and responsive. There's also a decent amount of audiovisual feedback with these controls. The speaker beeps when you hit max volume and chimes when you enter Bluetooth pairing mode. A small light under the power button flashes red when the battery is low and blue when entering Bluetooth pairing mode. That said, there's no other feedback given for volume changes or minimum volume.

'+' and '-' buttons:

• Single tap: Increases or decreases the volume.

Power button:

• Single tap: Turns the speaker on/off.

Call button:

• Single tap: Answers a call. Plays/pauses track.
• Double press: Rejects/ends a call. Skips to the next track.
• Triple press: Skips back to the previous track.

Bluetooth button:

• Single tap: Pairs with a Bluetooth device.
• Press and hold: Activates 'Wireless Stereo Boost' mode to pair with another Onyx Studio 8 speaker.

The controls themselves are simple enough to use but are hampered by their confusing and unreliable double/triple functions. We found that the speaker often wouldn't register the correct amount of taps and would input the wrong command. When paired with another Onyx Studio 8 speaker, there are a few smaller lights on the back of the speaker that tell you whether the speaker is playing back on the left or right channel.