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Wwise SDK 2021.1.14
Important Keywords and Concepts

A query always starts with a source, followed by a series of transforms, where each transform provides the input to the next transform as a sequence of objects. The query source is defined by a from statement. Transforms are defined by specific keywords that each take different arguments, for example, where volume < 0.

Keyword Description
from
The from keyword specifies a source from which the sequence will be initialized. All queries have a source, however, when the from keyword is omitted, all objects from the project are implicitly selected as the source.
Refer to the Wwise Authoring Query Language (WAQL) Reference to learn more about all sources possible with the from keyword.
For convenience, it is also possible to use existing objects as the source, by omitting the from object.
Examples:
  • $ from project
  • $ from type sound
  • $ from object "\\Actor-Mixer Hierarchy\\Default Work Unit\\Hello"
  • $ "Event:Play_Hello", "Bus:Master Audio Bus"
A sequence generated with a from statement:
For further details and usage examples, refer to Wwise Authoring Query Language (WAQL) Reference.
where
The where keyword allows you to filter objects of the input sequence by rejecting objects that don't match the specified expression.
The where keyword must be followed by a boolean expression, which will be executed on every object of the input sequence.
Examples:
  • where volume < 0
  • where name = "Hello"
  • where parent.name : "container"
  • where outputbus = "Bus:Master Audio Bus" and name =/_[0-9]+$/
A sequence transformed by a where statement:
For further details and usage examples, refer to Wwise Authoring Query Language (WAQL) Reference.
select
The select keyword allows you to generate a sequence of objects for each object of the input sequence.
Examples:
  • select children
  • select outputbus
  • select ancestors
  • select effect0, effect1, effect2, effect3
A sequence transformed by a select statement:
For further details and usage examples, refer to Wwise Authoring Query Language (WAQL) Reference.
... Other transforms are also available. To learn more about them, refer to Wwise Authoring Query Language (WAQL) Reference.

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