I cannot hear or see

The microphone, cameras, screen sharing, a call that drops and music that does not play.

The table's sound has three parts that fail for different reasons: the voice call and cameras (your microphone, your camera and the browser permission), the music and effects of the table (the browser blocks sound until the first tap) and, on a phone, the quirks of the system. Start with the one that is happening to you.

Where it is

The call lives in the Voice button in the table header, with the cameras in Cameras; ambient sound and music are in Sound and music at the table. The detail of each setting is in Cameras, voice and the call.

Nobody can hear me

Check that you have joined the call: nothing connects until you press Join the call. The button's mark says whether you are out, connecting, in or with the mic closed.
Open the mic with Open your mic or with Shift M. If you turned on Hold Space to talk, you are heard only while you hold the key.
In Devices, check that the chosen Microphone is the right one; an unplugged headset leaves the choice on a device that no longer exists.
Check the browser permission: the padlock in the address bar must allow the microphone for roliando.com. If you denied it once, it has to be allowed again there and the page reloaded.
Calibrate the sensitivity in Voice settings with the live meter: too high clips the start of sentences; too low never opens.
Another application (a video chat, a game) may be holding the microphone: close it.

I cannot hear someone, or there is echo

Raise that person's volume in the voice settings (each person's volume goes up to 250 %) and check that you have not muted them. Echo is cut with headphones; echo cancellation and Noise suppression are in the same settings.

I cannot see the cameras

They may be hidden: press V or choose another layout in Cameras. With the cameras hidden, in clean screen or with the tab out of view their video is not downloaded, on purpose. If your camera does not show, check that it is on (Turn your camera on) and that the browser lets it be used.

The call drops or does not connect

Press Reconnect in the call menu. If it does not come back, leave with Leave the call, reload the table and join again. A VPN or a company network can block voice between browsers; try with mobile data to rule it out.

I cannot share my screen

The browser does not offer it (on a phone almost never) or the permission was denied. Try it in a desktop browser.

Music and effects do not play

The browser blocks sound until the first tap on the page: touch the screen and press Enable audio. Also check that your channel is not muted in the table mixer and that the system volume is not at zero. If you see "Table audio is not available. Reload the table to reconnect the audio.", reload the table. If the music cuts off abruptly when the scene changes, the fade is at zero: raise it in More settings.

On mobile

Phones block sound and the microphone more strictly: grant the permission the first time, do not mix the call with another voice app and, if you use Bluetooth headphones, remember that opening the mic may make the system lower the sound quality.