A compressor is used to reduce the dynamic range of audio by moving the highs
and lows of a signal closer together. It does this by lowering the volume of
the highest parts of a source while at the same time raising the overall
volume. This type of effect is useful when you have many sounds playing and
you want to make sure the quieter ones are still audible. This effect can be
applied to either an individual `Class.Sound` or `Class.SoundGroup` by
parenting it to the desired instance.

A compressor has several properties which determine how it works. The
`Class.CompressorSoundEffect.Threshold` is the audio level where the
compressor will start to lower the volume. As soon as the source goes below
the threshold, the compressor will stop lowering the volume.

The `Class.CompressorSoundEffect.Attack` determines how long it takes for the
compressed effect to fully apply. After the threshold has been crossed the
compressor will lower the volume over time until the desired ratio has been
reached. It will take the time specified by Attack to reach this ratio.

The `Class.CompressorSoundEffect.Release` determines how long it takes for the
compressor to remove its effect. After the volume of the source is under the
threshold, the compressor will restore the volume back to the original over
the time specified by Release.

Along with lowering the volume when the sound has passed the threshold, a
compressor will also amplify the entire sound (after any threshold lowering
has taken effect). This allows quieter sounds to be amplified while louder
sounds can stay about the same. The `Class.CompressorSoundEffect.GainMakeup`
determines how much the effect amplifies the sound.


CompressorSoundEffect

Range: 0.1 to 1 (default 0.1) The time the effect takes to become active
after its Threshold has be reached. Measured in seconds.


CompressorSoundEffect.Attack

The time the effect takes to become active after its Threshold has be
reached.


Range: 0 to 30 (default 0) The overall amplification applied to the
effect's Sound or SoundGroup after attenuation of sounds above the
threshold. Keep in mind this amplification will occur as long as the
effect is Active, regardless of whether the Threshold has be reached or
not. Measured in dB.


CompressorSoundEffect.GainMakeup

The overall amplification applied to the effect's Sound or SoundGroup
after attenuation of sounds above the threshold.


The ratio between the `Class.CompressorSoundEffect.SideChain` sound
effect, and this sound effect.


CompressorSoundEffect.Ratio

Range: 0 to 5 (default 0.1) The time the effect takes to become inactive
after its sound is below the Threshold. Measured in seconds.


CompressorSoundEffect.Release

The time the effect takes to become inactive after its sound is below the
Threshold.


Applies a
<a rel="nofollow" href="https://en.wikipedia.org/wiki/Ducking">ducking</a>
effect to the compressor sound effect. The behavior of the sidechain
depends on the `Class.Sound` or `Class.SoundGroup` linked to it.


CompressorSoundEffect.SideChain

Applies a ducking effect to the compressor sound effect. The behavior of
the sidechain depends on the `Class.Sound` or `Class.SoundGroup` linked to
it.


Range: -80 to 0 (default 0) Volume level at which point the compressor
applies its effect. If the effect's Sound or SoundGroup is below the
effect will not attenuate the sound, although the GainMakeup will still be
applied. Measured in dB.


CompressorSoundEffect.Threshold

Volume level at which point the compressor applies its effect.


SoundEffect is the base class that all other sound effects derive from. A
SoundEffect can be applied to either a `Class.Sound` or `Class.SoundGroup` by
being parented to either. Multiple effects can be applied to the same Sound or
SoundGroup. The order the effects will be applied in is determined by that
effect's Priority.


SoundEffect

Toggles the effect on and off. True by default.


SoundEffect.Enabled

Determines the order the effect will be applied in relation to other
effects. Higher priority effects will be applied earlier. The exception is
when Priority equals 0 (which is the default). In this case, the base
priority for the effect will be used. If the priority of two effects are
equal, then the order is undetermined.


SoundEffect.Priority

Determines the order the effect will be applied in relation to other
effects.


SoundEffect is the base class that all other sound effects derive from. A
SoundEffect can be applied to either a `Class.Sound` or `Class.SoundGroup` by
being parented to either.


/reference/engine/classes/CompressorSoundEffect.yaml

Data Type

Instance

An object that runs connected functions upon a specific occurrence.

RBXScriptSignal

Data type having a value of either true or false.

Luau

boolean

A double-precision floating-point number.

number

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This method is asynchronous and returns an `Operation`, which represents the current state of the operation. It contains an endpoint path that you can poll to obtain the real response and applicable metadata. See the [documentation]({longRunningOperationsLink}) on long-running operations for more information.
            
The following sections describe the response and metadata objects that are provided when an operation completes.

Beta endpoints are ready for public use. Breaking changes are possible but rare.

This field may be set when creating a resource, but may not be modified by subsequent requests.

These fields may be set when creating a resource, but may not be modified by subsequent requests.

This field may be provided in requests, but will never be included in responses.

Per API Key: {maxInPeriod} requests every {periodInSeconds} seconds per IP Address

This field may be set on responses, but will be ignored in requests.

Note: Rate limits can be lower during high-traffic periods. Certain endpoints have additional rate limits. [Learn more about rate limits]({link}).

{limit} requests per day across all API keys for a user or group

{limit} requests per hour across all API keys for a user or group

{limit} requests per minute across all API keys for a user or group

{limit} requests per second across all API keys for a user or group

{limit} requests per minute per API key owner

{limit} request(s) per second per API key owner

The following API key permissions are required to call this endpoint. For more
information on generating proper keys, see [Manage API keys]({apiKeyReferenceDocLink}).

The following endpoints are available at paths relative to the base URL.

This string is formatted as a [FieldMask](/cloud/reference/types#fieldmask).

A JSON value can be `null`, `boolean`, `string`, `number`, `array`, or `object`.

The following scopes are required for your OAuth 2.0 application to use this endpoint. For more information on how to register an OAuth 2.0 application, see [App registration and review]({oauth2ReferenceDocLink}).

The following objects describe payloads that are accepted or returned. See each individual endpoint for more information on when these objects are used.

This string is formatted as a [Timestamp](/cloud/reference/types#timestamp).

The following scopes are required for your OAuth 2.0 application to use this endpoint. For more information on how to register an OAuth 2.0 application, see [App Registration and Review]({oauth2ReferenceDocLink}).

This allows viewing information about your assets.

This allows uploading and updating assets to Roblox.

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Grants the ability to update badges owned by the user.

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This allows editing of your commerce merchant connections.

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This allows you to modify information about your Creator Store products.

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This allows viewing information about your inventory.

Grants access to mange your badges and spend robux.

Grants access to manage your developer products.

Grants access to read information about the experiences you follow.

Grants access to follow and unfollow experiences on your behalf.

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Grants access to manage your experiences and certain information associated with your experiences (e.g. localization information).

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Grants access to modify your experiences' localization preferences.

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This grants the ability to publish messages on behalf of users.

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This allows listing secrets associated with your experience.

This allows creating and updating secrets associated with your experience.

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This operation grants access to publish new versions of experiences to Roblox.

Grants the ability to read experience information.

Grants the ability to edit experience information.

Allows you to view user restrictions in the experience.

Allows you to edit user restrictions in the experience.

Grants the ability to read user's premium and verified status.

This allows you to view a user's social accounts.

This enables Single Sign-On functionality.

This grants access to read your profile information.

Default Value: {defaultValueStart}{defaultValueEnd}

An array is an ordered list of values. Arrays are useful for storing collections of data.

A set of key-value pairs, where the keys can be any number, string, or object.

This function returns immediately if possible, but can yield the thread that called it until it can return a value.

{nameStart}name{nameEnd} is no longer supported or maintained by Roblox.

This math operation is no longer supported or maintained by Roblox.

This member doesn’t appear in the object browser and is not intended for widespread use.

This member is only accessible only through the command bar. Attempting to access this member from scripts causes an error.

This function can’t pause the Lua thread that called it.

Attempting to access this member in scripts causes an error. You might be able to access this member from Roblox Studio's property window.

This member doesn’t appear in Roblox Studio’s Object Browser.

You can’t create an instance of this class with the Instance.new constructor.

Roblox does not replicate this member across its server-client boundary.

Lua code can’t access this member. You might be able to change its value from the property window in Roblox Studio.

This member is accessible from OpenCloud Luau execution tasks.

This object’s replication behavior is dependent on the player who owns it.

This member is accessible through the command bar and plugins. Attempting to access this member from scripts causes an error.

This member is read only. Attempting to write to this member causes an error.

This property is read-only and is safe to read in unsynchronized threads. Attempting to write to it causes an error.

This member is accessible only in CoreScripts.

Only Roblox CoreScripts can access this member, and it isn’t usable by Players.

You can read and write to this property safely from multiple threads.

This class is a top-level singleton. Retrieve an instance of this class with the GetService function.

Multiple threads can potentially write to this property, so it’s unsafe to read from unsynchronized threads.

This function pauses the Lua thread that called it until it returns a result. This doesn’t interrupt other scripts.

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CompressorSoundEffect

Summary

Properties

Properties

Attack

GainMakeup

Ratio

Release

SideChain

Threshold