Update Functions-(Sound-Instances).md
Juju Adams
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**Returns:** N/A (`undefined`)
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|Argument |Datatype|Description |
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|-----------------|--------|------------------------------------------------------|
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|`soundInstanceID`|number | |
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|`loop` |boolean | |
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|-----------------|--------|--------------------------------------------------------------------------------|
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|`soundInstanceID`|number |Sound instance to target |
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|`loop` |boolean |Whether the sound instance should replay from the start when it finishes playing|
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Plays the given sound instance. If the sound instance is set to *not* loop (`loop` is `false`) then `FAudio_SoundInstance_DestroyWhenFinished()` will be called automatically for the sound instance.
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|Argument |Datatype|Description |
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|-----------------|--------|------------------------------------------------------|
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|`soundInstanceID`|number | |
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|`soundInstanceID`|number |Sound instance to target |
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Pauses playback of a sound instance. It can later be resumed by calling `FAudio_SoundInstance_Resume(soundInstanceID)`.
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## `~_SoundInstance_Resume(soundInstanceID)`
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**Returns:** N/A (`undefined`)
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|Argument |Datatype|Description |
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|-----------------|--------|------------------------------------------------------|
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|`soundInstanceID`|number |Sound instance to target |
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Resumes playback of a sound instance that has been paused by `FAudio_SoundInstance_Pause()`. If the sound instance in question hasn't been paused then this function does nothing.
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|Argument |Datatype|Description |
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|-----------------|--------|------------------------------------------------------|
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|`soundInstanceID`|number | |
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|`soundInstanceID`|number |Sound instance to target |
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Stops playback of the given sound instance completely. To restart playback, `FAudio_SoundInstance_Play()` should be called.
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|Argument |Datatype|Description |
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|-----------------|--------|------------------------------------------------------|
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|`soundInstanceID`|number | |
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|`soundInstanceID`|number |Sound instance to target |
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Destroys a sound instance, freeing memory associated with it.
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|Argument |Datatype|Description |
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|-----------------|--------|------------------------------------------------------|
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|`soundInstanceID`|number | |
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|`soundInstanceID`|number |Sound instance to target |
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Sets a sound instance to self-destruct when it finishes playing. This is useful for one-off audio clips that you don't want to keep track of.
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|Argument |Datatype|Description |
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|-----------------|--------|---------------------------------------------------------------------------|
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|`soundInstanceID`|number | |
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|`soundInstanceID`|number |Sound instance to target |
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|`pan` |number |Should be from `-1` (100% left) to `+1` (100% right) with `0` being central|
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Sets the stereo (left/right) panning of the sound instance. This is useful to fake positional audio in 2D, amongst other mixing techniques.
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## `~_SoundInstance_SetPitch(soundInstanceID, pitch)`
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|Argument |Datatype|Description |
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|-----------------|--------|------------------------------------------------------------------------------------------------------------------------------------------------------------|
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|`soundInstanceID`|number | |
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|`soundInstanceID`|number |Sound instance to target |
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|`pitch` |number |Frequency multiplier. A value of `2` will double the frequency and make the pitch higher, a value of `0.5` will halve the frequency and make the pitch lower|
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Changes the pitch of the audio by time-stretching or time-condensing playback. This also changes the playback time accordingly (a higher-pitched sound will take less time to fully play).
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## `~_SoundInstance_SetVolume(soundInstanceID, volume)`
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|Argument |Datatype|Description |
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|-----------------|--------|--------------------------------------------------------|
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|`soundInstanceID`|number | |
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|`volume` |number | |
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|`soundInstanceID`|number |Sound instance to target |
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|`volume` |number |Volume of the sound instance. `1` is 100% volume |
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Sets the volume for the sound instance. To change volume smoothly over time, please use `FAudio_SoundInstance_SetVolumeOverTime()`.
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|Argument |Datatype|Description |
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|-----------------|--------|--------------------------------------------------------|
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|`soundInstanceID`|number | |
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|`x` |number | |
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|`y` |number | |
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|`z` |number | |
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|`soundInstanceID`|number |Sound instance to target |
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|`x` |number |x-position of the sound instance |
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|`y` |number |y-position of the sound instance |
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|`z` |number |z-position of the sound instance |
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Places the sound instance in 3D space. In combination with `FAudio_SetListenerPosition()`, this sets the relative panning and volume for the sound instance to give the illusion of the player being in a 3D environment.
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|Argument |Datatype|Description |
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|-----------------|--------|--------------------------------------------------------|
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|`soundInstanceID`|number | |
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|`xVelocity` |number | |
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|`yVelocity` |number | |
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|`zVelocity` |number | |
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|`soundInstanceID`|number |Sound instance to target |
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|`xVelocity` |number |x-component of the velocity of the sound instance |
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|`yVelocity` |number |y-component of the velocity of the sound instance |
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|`zVelocity` |number |z-component of the velocity of the sound instance |
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Sets the velocity of the sound instance, allowing for pitch shifting to emulate the [Doppler effect](https://en.wikipedia.org/wiki/Doppler_effect).
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|Argument |Datatype|Description |
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|------------------------|--------|--------------------------------------------------------|
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|`soundInstanceID` |number | |
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|`trackPositionInSeconds`|number | |
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|`soundInstanceID` |number |Sound instance to target |
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|`trackPositionInSeconds`|number |Track position to jump to, in seconds |
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Jumps to a fixed position in the sound instance's audio asset. This is useful for audio assets that are comprised of a few different sections.
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|Argument |Datatype|Description |
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|-----------------|--------|--------------------------------------------------------|
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|`soundInstanceID`|number | |
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|`volume` |number | |
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|`milliseconds` |number | |
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|`soundInstanceID`|number |Sound instance to target |
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|`volume` |number |Target velocity to interpolate towards |
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|`milliseconds` |number |Duration of the interpolation, in milliseconds |
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Smoothly interpolates the volume of a sound instance over time. This time can be very short or very long, as you see fit.
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**Returns:** N/A (`undefined`)
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|Argument |Datatype|Description |
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|-----------------|--------|--------------------------------------------------------|
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|`soundInstanceID`|number | |
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|`lowPassFilter` |number | |
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|`Q` |number | |
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|-----------------|--------|-------------------------------------------------------------------------|
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|`soundInstanceID`|number |Sound instance to target |
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|`lowPassFilter` |number |Frequency of the low-pass. This is a value from `0` (20hz) to `1` (20khz)|
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|`Q` |number |Unitless - the steepness of the cutoff knee. A recommended value is `1` |
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Sets a low-pass filter on a sound instance, cutting out high frequencies. This has the effect of making the sound seem muffled.
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**Returns:** N/A (`undefined`)
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|Argument |Datatype|Description |
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|-----------------|--------|--------------------------------------------------------|
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|`soundInstanceID`|number | |
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|`lowPassFilter` |number | |
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|`Q` |number | |
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|-----------------|--------|--------------------------------------------------------------------------|
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|`soundInstanceID`|number |Sound instance to target |
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|`highPassFilter` |number |Frequency of the high-pass. This is a value from `0` (20hz) to `1` (20khz)|
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|`Q` |number |Unitless - the steepness of the cutoff knee. A recommended value is `1` |
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## `~_SoundInstance_SetHighPassFilter(soundInstanceID, highPassFilter, Q)`
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**Returns:** N/A (`undefined`)
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|Argument |Datatype|Description |
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|-----------------|--------|--------------------------------------------------------|
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|`soundInstanceID`|number | |
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|`highPassFilter` |number | |
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|`Q` |number | |
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Sets a high-pass filter on a sound instance, cutting out low frequencies. This has the effect of making the sound seem tinny and thin.
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**Returns:** N/A (`undefined`)
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|Argument |Datatype|Description |
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|-----------------|--------|--------------------------------------------------------|
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|`soundInstanceID`|number | |
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|`bandPassFilter` |number | |
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|`Q` |number | |
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|-----------------|--------|--------------------------------------------------------------------------|
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|`soundInstanceID`|number |Sound instance to target |
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|`bandPassFilter` |number |Frequency of the band-pass. This is a value from `0` (20hz) to `1` (20khz)|
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|`Q` |number |Unitless - the steepness of the cutoff knee. A recommended value is `1` |
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Sets a band-pass filter on a sound instance, cutting out frequencies above and below the center of the band. What this sounds like depends on what frequency you choose, but it has a habit of making sounds seem nasal and boxy.
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|Argument |Datatype|Description |
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|-----------------|--------|--------------------------------------------------------|
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|`soundInstanceID`|number | |
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|`soundInstanceID`|number |Sound instance to target |
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|Argument |Datatype|Description |
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|-----------------|--------|--------------------------------------------------------|
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|`soundInstanceID`|number | |
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|`soundInstanceID`|number |Sound instance to target |
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|Argument |Datatype|Description |
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|-----------------|--------|--------------------------------------------------------|
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|`soundInstanceID`|number | |
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|`soundInstanceID`|number |Sound instance to target |
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|Argument |Datatype|Description |
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|-----------------|--------|--------------------------------------------------------|
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|`soundInstanceID`|number | |
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|`soundInstanceID`|number |Sound instance to target |
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