Package echonest :: Package remix :: Module audio :: Class AudioQuantumList

Class AudioQuantumList

A container that enables content-based selection and filtering. A List that contains AudioQuantum objects, with additional methods for manipulating them.

When an AudioQuantumList is created for a track via a call to the Analyze API, attach() is called so that its container is set to the containing AudioAnalysis, and the container of each of the AudioQuantum list members is set to itself.

Additional accessors now include AudioQuantum elements such as start, duration, and confidence, which each return a List of the corresponding properties in the contained AudioQuanta. A special name is kinds, which returns a List of the kind of each AudioQuantum. If AudioQuantumList.kind is "segment", then pitches, timbre, loudness_begin, loudness_max, time_loudness_max, and loudness_end are available.

Instance Methods

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new empty list

__init__(self, initial=None, kind=None, container=None, source=None)
Initializes an AudioQuantumList. All parameters are optional.

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get_many(attribute)

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get_many_if_segment(attribute)

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get_duration(self)

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get_source(self)
Returns its own or its parent's source.

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set_source(self, value)
Checks input to see if it is an AudioData.

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sources(self)

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attach(self, container)
Create circular references to the containing AudioAnalysis and for the contained AudioQuantum objects.

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__getstate__(self)
Eliminates the circular reference for pickling.

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toxml(self, context=None)

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render(self, start=0.0, to_audio=None, with_source=None)

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Inherited from list: __add__, __contains__, __delitem__, __delslice__, __eq__, __ge__, __getattribute__, __getitem__, __getslice__, __gt__, __iadd__, __imul__, __iter__, __le__, __len__, __lt__, __mul__, __ne__, __new__, __repr__, __reversed__, __rmul__, __setitem__, __setslice__, __sizeof__, append, count, extend, index, insert, pop, remove, reverse, sort

Inherited from AudioRenderable: encode, resolve_source

Inherited from object: __delattr__, __format__, __reduce__, __reduce_ex__, __setattr__, __str__, __subclasshook__

Static Methods

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Inherited from AudioRenderable: init_audio_data

Class Variables

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Inherited from list: __hash__

Properties

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durations

kinds

start

confidence

pitches

timbre

loudness_begin

loudness_max

time_loudness_max

loudness_end

source
The AudioData source for the AudioQuantumList.

duration
Total duration of the AudioQuantumList.

Inherited from object: __class__

Method Details

[hide private]

init(self, initial=None, kind=None, container=None, source=None)
(Constructor)

source code

Initializes an AudioQuantumList. All parameters are optional.

Parameters:

initial - a List type with the initial contents
kind - a label for the kind of AudioQuantum contained within
container - a reference to the containing AudioAnalysis
source - a reference to the AudioData with the corresponding samples and time base for the contained AudioQuanta

Returns: new empty list

Overrides: object.__init__

sources(self)

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Overrides: AudioRenderable.sources

Property Details

[hide private]

durations

Get Method:: unreachable.fun(self)

kinds

Get Method:: unreachable.fun(self)

start

Get Method:: unreachable.fun(self)

confidence

Get Method:: unreachable.fun(self)

pitches

Get Method:: unreachable.fun(self)

timbre

Get Method:: unreachable.fun(self)

loudness_begin

Get Method:: unreachable.fun(self)

loudness_max

Get Method:: unreachable.fun(self)

time_loudness_max

Get Method:: unreachable.fun(self)

loudness_end

Get Method:: unreachable.fun(self)

source

The AudioData source for the AudioQuantumList.

Get Method:: get_source(self) - Returns its own or its parent's source.
Set Method:: set_source(self, value) - Checks input to see if it is an AudioData.

duration

Total duration of the AudioQuantumList.

Get Method:: get_duration(self)

Class AudioQuantumList

__init__(self, initial=None, kind=None, container=None, source=None) (Constructor)

sources(self)

durations

kinds

start

confidence

pitches

timbre

loudness_begin

loudness_max

time_loudness_max

loudness_end

source

duration

init(self, initial=None, kind=None, container=None, source=None)
(Constructor)