Runtime environment notes

System properties

The following table describes the system properties used in AMMS API.

All retuned values are Strings. In cases where more than one value are returned, the values are delimited by one whitespace (Unicode U+0020).

**Table:** AMMS API system properties
Name	Description	Values
`microedition.amms.version`	Returns the version of the AMMS specification that is implemented on the device.	1.1
`supports.mediacapabilities`	Specifies the supported media capabilities.	The return values are chosen from the following list depending on device support: `audio3d` `music` `camera` `imageencoding` `imagepostprocessing` `tuner`
`audio3d.simultaneouslocations`	Specifies the maximum number of `SoundSource3D` modules that the application is recommended to have active simultaneously. Note that this limit is not enforced as its function is to serve as guideline rather than a strict limit. No resources are used until a `Player` is attached to the sound source at which point resource unavailability might cause `Player` operations to fail (with `MediaException` being thrown).	4 Note: This is not actually enforced. The return value is meant to serve as a guideline rather than a strict limit.
`audio.samplerates`	Specifies the supported audio sampling rates in hertzs.	`16000`, `32000` or `48000`
`camera.orientations`	Returns the orientation of the camera on the device. This property helps you make the distinction between cameras that are directed outwards from the device and cameras that are directed inwards, towards the user. Multiple cameras are differentiated by their locator names. For more information, see section Recording sound and video.	`[locator_name] [direction]` Possible return values for `[direction]` are: `inwards` - the camera is pointing towards the user when the device is held in a natural way `outwards` - the camera is pointing away from the user when the device is held in a natural way `unknown` - the pointing direction of the camera is user configurable or cannot be known for some other reason
`camera.resolutions`	A list of camera device sensor resolutions.	`[locator_name] [width]x[height]` For example: `capture://devcam0 640x480`
`tuner.modulations`	Specifies the supported tuner modulation settings for which a `Player` can be created.	`fm` `am`