: If a small value is set for any of the settings that affect the volume, such as the volume itself or a bus level, the resulting output level may be too low to hear.
There are many settings on both the data and code sides that can affect the output level. Check if any of these settings have been set to an extremely small value.

Checking the Data

: Are any volume-related parameters being set to a small value on the data side?
Check the settings of:

Cue Volume
Track Volume
Volume Settings by Automation
Pan 3D Volume
Bus Send Level
AISAC Volume
Category Volume
REACT Volume

Checking the Program

: Are any volume-related parameters being set to a small value on the program side?
Check the calls to the following functions:

Volume -> criAtomExPlayer_SetVolume
Bus Send Level -> criAtomExPlayer_SetBusSendLevelByName
Pan 3D Volume -> criAtomExPlayer_SetPan3dVolume
Category Volume -> criAtomExCategory_SetVolumeById , criAtomExCategory_SetVolumeByName
Category Mute Setting -> criAtomExCategory_MuteById , criAtomExCategory_MuteByName
Category Solo Setting -> criAtomExCategory_SoloById , criAtomExCategory_SoloByName

Checking 3D Positioning

: If you are using 3D positioning for panning, check the following:

Distance-based Attenuation

: Is the distance between the listener and the sound source greater than the maximum attenuation distance?
If the distance is greater than the maximum attenuation distance, the sound will be played with a volume of 0.

Cone Angle (Internal/External)

If a cone is set for the sound source, is the orientation of the cone outside the external angle of the cone in relation to the listener?
You can obtain the cone settings for a Cue with the following APIs: