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# Configure Complex References

You can set parameter values indirectly, as follows.

    ConfigParam=$ConfigSection.VarParam.AnotherParam

where:

`ConfigParam` | is the name of the configuration parameter set to the value of the referenced configuration parameter.
`ConfigSection` | is the name of the configuration section where the referenced variable configuration parameter appears.
`VarParam` | is the name of the configuration parameter in the `ConfigSection` section, which references another configuration section.
`AnotherParam` | is the name of the configuration parameter in the configuration section specified by the value of `VarParam`, whose value the `ConfigParam` parameter takes.

For example, if an action parameter allows you to choose which language model to use for a particular action, all configuration parameters in the used modules must reference the correct language configuration.

    [stt]
    Lang=$params.Lang=ENUK

In this case, you can choose a language pack by using the `Lang` action parameter to specify the configuration section where the language options are set.

All configuration parameters that can change between language models must refer to the correct language configuration section. For example, you can set the `SampleFrequency` configuration parameter for modules as well as languages. To use the correct value, you can set `SampleFrequency` in all modules to refer to the `Lang` configuration parameter in a single module.

    [audio]
    SampleFrequency=$stt.Lang.SampleFrequency

In this example, the `SampleFrequency` parameter in the `audio` module refers to the `Lang` parameter in the `stt` module. In the `stt` section, the `Lang` configuration parameter uses the `Lang` action parameter to determine which language configuration section to use.

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