Class ID3_Frame_RVA2
The Relative volume adjustment (2) frame is a more subjective frame than
the previous ones. It allows the user to say how much he wants to increase/decrease the volume on each channel when the file is played. The purpose is to be able to align all files to a reference volume, so that you don't have to change the volume constantly. This frame may also be used to balance adjust the audio. The volume adjustment is encoded as a fixed point decibel value, 16 bit signed integer representing (adjustment*512), giving +/- 64 dB with a precision of 0.001953125 dB. E.g. +2 dB is stored as $04 00 and -2 dB is $FC 00.
There may be more than one RVA2 frame in each tag, but only one with the same identification string.
Located in /ID3/Frame/RVA2.php (line 66)
ID3_Object | --ID3_Frame | --ID3_Frame_RVA2
("Other", "Master volume", "Front right", "Front left", "Back right",
"Back left", "Front centre", "Back centre", "Subwoofer") (line 96)
The list of channel types.
Inherited Variables
Inherited from ID3_Frame
ID3_Frame::$_data
Inherited from ID3_Object
ID3_Object::$_reader
Constructs the class with given parameters and parses object related data.
- Reader $reader: The reader object.
- Array $options: The options array.
- &$options
- ID3_Frame::__construct()
- Constructs the class with given parameters and reads object related data from the ID3v2 tag.
Returns the array containing volume adjustments for each channel. Volume adjustments are arrays themselves containing the following keys: channelType, volumeAdjustment, peakVolume.
Returns the device where the adjustments should apply.
Sets the array of volume adjustments for each channel. Each volume adjustment is an array too containing the following keys: channelType, volumeAdjustment, peakVolume.
- Array $adjustments: The volume adjustments array.
Sets the device where the adjustments should apply.
- string $device: The device.
Returns the frame raw data.
- ID3_Frame::__toString()
- Returns the frame raw data.
Inherited Methods
Inherited From ID3_Frame
ID3_Frame::__construct()
ID3_Frame::getFlags()
ID3_Frame::getIdentifier()
ID3_Frame::getSize()
ID3_Frame::hasFlag()
ID3_Frame::setData()
ID3_Frame::setFlags()
ID3_Frame::setIdentifier()
ID3_Frame::__toString()
Inherited From ID3_Object
ID3_Object::__construct()
ID3_Object::decodeSynchsafe32()
ID3_Object::decodeUnsynchronisation()
ID3_Object::encodeSynchsafe32()
ID3_Object::encodeUnsynchronisation()
ID3_Object::explodeString8()
ID3_Object::explodeString16()
ID3_Object::getOption()
ID3_Object::getOptions()
ID3_Object::setOption()
ID3_Object::setOptions()
ID3_Object::__get()
ID3_Object::__set()
channelType
= "channelType"
(line 74)
The channel type key.
peakVolume
= "peakVolume"
(line 89)
The peak volume key.
volumeAdjustment
= "volumeAdjustment"
(line 82)
The volume adjustment key. Adjustments are +/- 64 dB with a precision of 0.001953125 dB.
Inherited Constants
Inherited from ID3_Frame
Documentation generated on Fri, 05 Sep 2008 20:19:17 +0300 by phpDocumentor 1.4.1