# DynamicsProcessing.MbcBand
Added in[API level 28](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)
# MbcBand
*** ** * ** ***
Kotlin\|[Java](https://developer.android.com/reference/android/media/audiofx/DynamicsProcessing.MbcBand "View this page in Java")
```
class MbcBand : DynamicsProcessing.BandBase
```
|---|---|------------------------------------------------------------------------------------------------------------------------------------------------------|
| [kotlin.Any](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-any/index.html) |||
| ↳ | [android.media.audiofx.DynamicsProcessing.BandBase](https://developer.android.com/reference/kotlin/android/media/audiofx/DynamicsProcessing.BandBase) ||
| | ↳ | [android.media.audiofx.DynamicsProcessing.MbcBand](https://developer.android.com/reference/kotlin/android/media/audiofx/DynamicsProcessing.MbcBand#) |
Class for Multi-Band compressor bands MBC bands have multiple controllable parameters: enabled/disabled, cutoffFrequency, attackTime, releaseTime, ratio, threshold, kneeWidth, noiseGateThreshold, expanderRatio, preGain and postGain.
## Summary
| Public constructors ||
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|---|
| [MbcBand](https://developer.android.com/reference/kotlin/android/media/audiofx/DynamicsProcessing.MbcBand#MbcBand(android.media.audiofx.DynamicsProcessing.MbcBand))`(`cfg:` `[DynamicsProcessing.MbcBand](https://developer.android.com/reference/kotlin/android/media/audiofx/DynamicsProcessing.MbcBand#)!`)` Class constructor for MbcBand |
| [MbcBand](https://developer.android.com/reference/kotlin/android/media/audiofx/DynamicsProcessing.MbcBand#MbcBand(kotlin.Boolean,%20kotlin.Float,%20kotlin.Float,%20kotlin.Float,%20kotlin.Float,%20kotlin.Float,%20kotlin.Float,%20kotlin.Float,%20kotlin.Float,%20kotlin.Float,%20kotlin.Float))`(`enabled:` `[Boolean](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-boolean/index.html)`, `cutoffFrequency:` `[Float](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-float/index.html)`, `attackTime:` `[Float](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-float/index.html)`, `releaseTime:` `[Float](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-float/index.html)`, `ratio:` `[Float](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-float/index.html)`, `threshold:` `[Float](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-float/index.html)`, `kneeWidth:` `[Float](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-float/index.html)`, `noiseGateThreshold:` `[Float](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-float/index.html)`, `expanderRatio:` `[Float](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-float/index.html)`, `preGain:` `[Float](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-float/index.html)`, `postGain:` `[Float](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-float/index.html)`)` Class constructor for MbcBand |
| Public methods ||
|----------------------------------------------------------------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| [Float](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-float/index.html) | [getAttackTime](https://developer.android.com/reference/kotlin/android/media/audiofx/DynamicsProcessing.MbcBand#getAttackTime())`()` gets attack time for compressor in milliseconds (ms) |
| [Float](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-float/index.html) | [getExpanderRatio](https://developer.android.com/reference/kotlin/android/media/audiofx/DynamicsProcessing.MbcBand#getExpanderRatio())`()` gets Expander ratio (1:N) for signals below the Noise Gate Threshold. |
| [Float](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-float/index.html) | [getKneeWidth](https://developer.android.com/reference/kotlin/android/media/audiofx/DynamicsProcessing.MbcBand#getKneeWidth())`()` get Knee Width in decibels (dB) around compressor threshold point. |
| [Float](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-float/index.html) | [getNoiseGateThreshold](https://developer.android.com/reference/kotlin/android/media/audiofx/DynamicsProcessing.MbcBand#getNoiseGateThreshold())`()` gets the noise gate threshold in decibels (dB) from 0 dB Full Scale (dBFS). |
| [Float](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-float/index.html) | [getPostGain](https://developer.android.com/reference/kotlin/android/media/audiofx/DynamicsProcessing.MbcBand#getPostGain())`()` gets the gain applied to the signal AFTER compression. |
| [Float](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-float/index.html) | [getPreGain](https://developer.android.com/reference/kotlin/android/media/audiofx/DynamicsProcessing.MbcBand#getPreGain())`()` gets the gain applied to the signal BEFORE the compression. |
| [Float](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-float/index.html) | [getRatio](https://developer.android.com/reference/kotlin/android/media/audiofx/DynamicsProcessing.MbcBand#getRatio())`()` gets the compressor ratio (N:1) |
| [Float](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-float/index.html) | [getReleaseTime](https://developer.android.com/reference/kotlin/android/media/audiofx/DynamicsProcessing.MbcBand#getReleaseTime())`()` gets release time for compressor in milliseconds (ms) |
| [Float](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-float/index.html) | [getThreshold](https://developer.android.com/reference/kotlin/android/media/audiofx/DynamicsProcessing.MbcBand#getThreshold())`()` gets the compressor threshold measured in decibels (dB) from 0 dB Full Scale (dBFS). |
| [Unit](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-unit/index.html) | [setAttackTime](https://developer.android.com/reference/kotlin/android/media/audiofx/DynamicsProcessing.MbcBand#setAttackTime(kotlin.Float))`(`attackTime:` `[Float](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-float/index.html)`)` sets attack time for compressor in milliseconds (ms) |
| [Unit](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-unit/index.html) | [setExpanderRatio](https://developer.android.com/reference/kotlin/android/media/audiofx/DynamicsProcessing.MbcBand#setExpanderRatio(kotlin.Float))`(`expanderRatio:` `[Float](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-float/index.html)`)` sets Expander ratio (1:N) for signals below the Noise Gate Threshold. |
| [Unit](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-unit/index.html) | [setKneeWidth](https://developer.android.com/reference/kotlin/android/media/audiofx/DynamicsProcessing.MbcBand#setKneeWidth(kotlin.Float))`(`kneeWidth:` `[Float](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-float/index.html)`)` sets knee width in decibels (dB). |
| [Unit](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-unit/index.html) | [setNoiseGateThreshold](https://developer.android.com/reference/kotlin/android/media/audiofx/DynamicsProcessing.MbcBand#setNoiseGateThreshold(kotlin.Float))`(`noiseGateThreshold:` `[Float](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-float/index.html)`)` sets noise gate threshod in decibels (dB). |
| [Unit](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-unit/index.html) | [setPostGain](https://developer.android.com/reference/kotlin/android/media/audiofx/DynamicsProcessing.MbcBand#setPostGain(kotlin.Float))`(`postGain:` `[Float](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-float/index.html)`)` sets the gain to be applied to the siganl AFTER the compression. |
| [Unit](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-unit/index.html) | [setPreGain](https://developer.android.com/reference/kotlin/android/media/audiofx/DynamicsProcessing.MbcBand#setPreGain(kotlin.Float))`(`preGain:` `[Float](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-float/index.html)`)` sets the gain to be applied to the signal BEFORE the compression, measured in decibels (dB), where 0 dB means no level change. |
| [Unit](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-unit/index.html) | [setRatio](https://developer.android.com/reference/kotlin/android/media/audiofx/DynamicsProcessing.MbcBand#setRatio(kotlin.Float))`(`ratio:` `[Float](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-float/index.html)`)` sets compressor ratio (N:1) |
| [Unit](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-unit/index.html) | [setReleaseTime](https://developer.android.com/reference/kotlin/android/media/audiofx/DynamicsProcessing.MbcBand#setReleaseTime(kotlin.Float))`(`releaseTime:` `[Float](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-float/index.html)`)` sets release time for compressor in milliseconds (ms) |
| [Unit](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-unit/index.html) | [setThreshold](https://developer.android.com/reference/kotlin/android/media/audiofx/DynamicsProcessing.MbcBand#setThreshold(kotlin.Float))`(`threshold:` `[Float](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-float/index.html)`)` sets the compressor threshold measured in decibels (dB) from 0 dB Full Scale (dBFS). |
| [String](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html) | [toString](https://developer.android.com/reference/kotlin/android/media/audiofx/DynamicsProcessing.MbcBand#toString())`()`
|
| Inherited functions ||
|---|---|
| From class[BandBase](https://developer.android.com/reference/kotlin/android/media/audiofx/DynamicsProcessing.BandBase) |------------------------------------------------------------------------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | [Float](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-float/index.html) | [getCutoffFrequency](https://developer.android.com/reference/kotlin/android/media/audiofx/DynamicsProcessing.BandBase#getCutoffFrequency())`()`
gets cutoffFrequency for this band in Hertz (Hz)
| | [Boolean](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-boolean/index.html) | [isEnabled](https://developer.android.com/reference/kotlin/android/media/audiofx/DynamicsProcessing.BandBase#isEnabled())`()`
returns enabled state of the band
| | [Unit](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-unit/index.html) | [setCutoffFrequency](https://developer.android.com/reference/kotlin/android/media/audiofx/DynamicsProcessing.BandBase#setCutoffFrequency(kotlin.Float))`(`frequency:` `[Float](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-float/index.html)`)`
sets topmost frequency number (in Hz) this band will process. The effective bandwidth for the band is then computed using this and the previous band topmost frequency (or 0 Hz for band number 0). Frequencies are expected to increase with band number, thus band 0 cutoffFrequency \<= band 1 cutoffFrequency, and so on.
| | [Unit](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-unit/index.html) | [setEnabled](https://developer.android.com/reference/kotlin/android/media/audiofx/DynamicsProcessing.BandBase#setEnabled(kotlin.Boolean))`(`enabled:` `[Boolean](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-boolean/index.html)`)`
sets enabled state of the band
| ||
## Public constructors
### MbcBand
Added in[API level 28](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)
```
MbcBand(cfg: DynamicsProcessing.MbcBand!)
```
Class constructor for MbcBand
| Parameters ||
|-------|--------------------------------------------------------------------------------------------------------------------------------------------------|
| `cfg` | [DynamicsProcessing.MbcBand](https://developer.android.com/reference/kotlin/android/media/audiofx/DynamicsProcessing.MbcBand#)!:copy constructor |
### MbcBand
Added in[API level 28](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)
```
MbcBand(
enabled: Boolean,
cutoffFrequency: Float,
attackTime: Float,
releaseTime: Float,
ratio: Float,
threshold: Float,
kneeWidth: Float,
noiseGateThreshold: Float,
expanderRatio: Float,
preGain: Float,
postGain: Float)
```
Class constructor for MbcBand
| Parameters ||
|----------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| `enabled` | [Boolean](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-boolean/index.html):true if this band is currently used to process sound. When false, the band is effectively muted and sound set to zero. |
| `cutoffFrequency` | [Float](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-float/index.html):topmost frequency number (in Hz) this band will process. The effective bandwidth for the band is then computed using this and the previous band topmost frequency (or 0 Hz for band number 0). Frequencies are expected to increase with band number, thus band 0 cutoffFrequency \<= band 1 cutoffFrequency, and so on. |
| `attackTime` | [Float](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-float/index.html):Attack Time for compressor in milliseconds (ms) |
| `releaseTime` | [Float](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-float/index.html):Release Time for compressor in milliseconds (ms) |
| `ratio` | [Float](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-float/index.html):Compressor ratio (N:1) (input:output) |
| `threshold` | [Float](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-float/index.html):Compressor threshold measured in decibels (dB) from 0 dB Full Scale (dBFS). |
| `kneeWidth` | [Float](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-float/index.html):Width in decibels (dB) around compressor threshold point. |
| `noiseGateThreshold` | [Float](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-float/index.html):Noise gate threshold in decibels (dB) from 0 dB Full Scale (dBFS). |
| `expanderRatio` | [Float](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-float/index.html):Expander ratio (1:N) (input:output) for signals below the Noise Gate Threshold. |
| `preGain` | [Float](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-float/index.html):Gain applied to the signal BEFORE the compression. |
| `postGain` | [Float](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-float/index.html):Gain applied to the signal AFTER compression. |
## Public methods
### getAttackTime
Added in[API level 28](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)
```
fun getAttackTime(): Float
```
gets attack time for compressor in milliseconds (ms)
| Return ||
|--------------------------------------------------------------------------------|-------------------------------------------------|
| [Float](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-float/index.html) | attack time for compressor in milliseconds (ms) |
### getExpanderRatio
Added in[API level 28](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)
```
fun getExpanderRatio(): Float
```
gets Expander ratio (1:N) for signals below the Noise Gate Threshold.
| Return ||
|--------------------------------------------------------------------------------|----------------------|
| [Float](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-float/index.html) | Expander ratio (1:N) |
### getKneeWidth
Added in[API level 28](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)
```
fun getKneeWidth(): Float
```
get Knee Width in decibels (dB) around compressor threshold point. Widths are always positive, with higher values representing a wider area of transition from the linear zone to the compression zone. A knee of 0 dB means a more abrupt transition.
| Return ||
|--------------------------------------------------------------------------------|-----------------------------|
| [Float](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-float/index.html) | Knee Width in decibels (dB) |
### getNoiseGateThreshold
Added in[API level 28](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)
```
fun getNoiseGateThreshold(): Float
```
gets the noise gate threshold in decibels (dB) from 0 dB Full Scale (dBFS). Noise gate thresholds are negative. Signals below this level will be expanded according the expanderRatio parameter. A Noise Gate Threshold of -75 dB means very quiet signals might be effectively removed from the signal.
| Return ||
|--------------------------------------------------------------------------------|---------------------------------------|
| [Float](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-float/index.html) | Noise Gate Threshold in decibels (dB) |
### getPostGain
Added in[API level 28](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)
```
fun getPostGain(): Float
```
gets the gain applied to the signal AFTER compression. Measured in decibels (dB) where 0 dB means no level change
| Return ||
|--------------------------------------------------------------------------------|---------------------------------|
| [Float](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-float/index.html) | postGain value in decibels (dB) |
### getPreGain
Added in[API level 28](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)
```
fun getPreGain(): Float
```
gets the gain applied to the signal BEFORE the compression. Measured in decibels (dB) where 0 dB means no level change.
| Return ||
|--------------------------------------------------------------------------------|--------------------------------|
| [Float](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-float/index.html) | preGain value in decibels (dB) |
### getRatio
Added in[API level 28](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)
```
fun getRatio(): Float
```
gets the compressor ratio (N:1)
| Return ||
|--------------------------------------------------------------------------------|------------------------|
| [Float](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-float/index.html) | compressor ratio (N:1) |
### getReleaseTime
Added in[API level 28](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)
```
fun getReleaseTime(): Float
```
gets release time for compressor in milliseconds (ms)
| Return ||
|--------------------------------------------------------------------------------|--------------------------------------------------|
| [Float](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-float/index.html) | release time for compressor in milliseconds (ms) |
### getThreshold
Added in[API level 28](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)
```
fun getThreshold(): Float
```
gets the compressor threshold measured in decibels (dB) from 0 dB Full Scale (dBFS). Thresholds are negative. A threshold of 0 dB means no compression will take place.
| Return ||
|--------------------------------------------------------------------------------|---------------------------------------|
| [Float](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-float/index.html) | compressor threshold in decibels (dB) |
### setAttackTime
Added in[API level 28](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)
```
fun setAttackTime(attackTime: Float): Unit
```
sets attack time for compressor in milliseconds (ms)
| Parameters ||
|--------------|----------------------------------------------------------------------------------------------------------------------------|
| `attackTime` | [Float](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-float/index.html):desired for compressor in milliseconds (ms) |
### setExpanderRatio
Added in[API level 28](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)
```
fun setExpanderRatio(expanderRatio: Float): Unit
```
sets Expander ratio (1:N) for signals below the Noise Gate Threshold.
| Parameters ||
|-----------------|-------------------------------------------------------------------------------------------------------------|
| `expanderRatio` | [Float](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-float/index.html):desired expander ratio (1:N) |
### setKneeWidth
Added in[API level 28](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)
```
fun setKneeWidth(kneeWidth: Float): Unit
```
sets knee width in decibels (dB). See[android.media.audiofx.DynamicsProcessing.MbcBand#getKneeWidth](https://developer.android.com/reference/kotlin/android/media/audiofx/DynamicsProcessing.MbcBand#getKneeWidth())for more information.
| Parameters ||
|-------------|---------------------------------------------------------------------------------------------------------|
| `kneeWidth` | [Float](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-float/index.html):desired in decibels (dB) |
### setNoiseGateThreshold
Added in[API level 28](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)
```
fun setNoiseGateThreshold(noiseGateThreshold: Float): Unit
```
sets noise gate threshod in decibels (dB). See[android.media.audiofx.DynamicsProcessing.MbcBand#getNoiseGateThreshold](https://developer.android.com/reference/kotlin/android/media/audiofx/DynamicsProcessing.MbcBand#getNoiseGateThreshold())for more information.
| Parameters ||
|----------------------|---------------------------------------------------------------------------------------------------------|
| `noiseGateThreshold` | [Float](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-float/index.html):desired in decibels (dB) |
### setPostGain
Added in[API level 28](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)
```
fun setPostGain(postGain: Float): Unit
```
sets the gain to be applied to the siganl AFTER the compression. Measured in decibels (dB), where 0 dB means no level change.
| Parameters ||
|------------|---------------------------------------------------------------------------------------------------------------|
| `postGain` | [Float](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-float/index.html):desired value in decibels (dB) |
### setPreGain
Added in[API level 28](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)
```
fun setPreGain(preGain: Float): Unit
```
sets the gain to be applied to the signal BEFORE the compression, measured in decibels (dB), where 0 dB means no level change.
| Parameters ||
|-----------|---------------------------------------------------------------------------------------------------------|
| `preGain` | [Float](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-float/index.html):desired in decibels (dB) |
### setRatio
Added in[API level 28](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)
```
fun setRatio(ratio: Float): Unit
```
sets compressor ratio (N:1)
| Parameters ||
|---------|-----------------------------------------------------------------------------------------------------------------|
| `ratio` | [Float](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-float/index.html):desired for the compressor (N:1) |
### setReleaseTime
Added in[API level 28](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)
```
fun setReleaseTime(releaseTime: Float): Unit
```
sets release time for compressor in milliseconds (ms)
| Parameters ||
|---------------|----------------------------------------------------------------------------------------------------------------------------|
| `releaseTime` | [Float](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-float/index.html):desired for compressor in milliseconds (ms) |
### setThreshold
Added in[API level 28](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)
```
fun setThreshold(threshold: Float): Unit
```
sets the compressor threshold measured in decibels (dB) from 0 dB Full Scale (dBFS). Thresholds are negative. A threshold of 0 dB means no compression will take place.
| Parameters ||
|-------------|-----------------------------------------------------------------------------------------------------------------------|
| `threshold` | [Float](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-float/index.html):desired for compressor in decibels(dB) |
### toString
Added in[API level 28](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)
```
fun toString(): String
```
| Return ||
|----------------------------------------------------------------------------------|----------------------------------------|
| [String](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html) | a string representation of the object. |