new AudioAnalysis(renderer, options)
AudioAnalysis returns a BPM based on music analisis. Either mp3 or microphone
Audio Analysis Example on codepen:
codepen
see more at Joe Sullivan
AudioAnalysis returns a floating point between 1 and 0, in sync with a bpm
the BPM is calculated based on an input music stream (mp3 file)
options.audio (String) is a source, like /path/to/mymusic.mp3
options.microphone (Boolean) use microphone (true) or audiosource (false)
Parameters:
| Name | Type | Description |
|---|---|---|
renderer |
GlRenderer | current |
options |
Object | object with several settings |
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Example
var mixer1 = new Mixer( _renderer, { source1: mySource, source2: myOtherSource })
var analysis = new AudioAnalysis( renderer, { audio: 'mymusic.mp3' } );
analysis.add( mixer1.pod )Members
audio
Audio element, HTMLMediaElement AUDIO reference
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mod
bpm mod, multiplyer for bpm output, usuall 0.125, 0.25, 0.5, 2, 4 etc.
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(static) audio_src
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(static) beats :number
number of beats since start
Type:
- number
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(static) bpm :number
(calculated) bpm
Type:
- number
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(static) bpm :number
the bpm float is a reference to the current beat-edge,
it represents a float between 0 and 1, with ±1 being given back every beat
Type:
- number
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(static) bps
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(static) count
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(static) dataSet
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(static) sec
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(static) tempoData
tempodate gives you a peak into the inner workins of the sampler, including bpm and 'calibrating' status
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Methods
add()
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connectOutput()
connects the audio source to output, making it audible
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disconnectOutput()
disconnects audio to output, this will mute the analalyser, but won't stop analysing
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getAmbience()
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getBlackOut()
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getBpm()
helper function, get's the bpm and retursn is, useful for mixer.bind( func )
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getHighLevels()
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getLowLevels()
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getMidLevels()
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render()
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sync()
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(inner) countIntervalsBetweenNearbyPeaks()
Finds peaks in the audiodata and groups them together
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(inner) forceAudio()
firstload for mobile, forces all control to the site on click
tries and forces another play-event after a click
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(inner) getTempo()
returns 'tempodata', a list of found BPMs sorted on occurrence
object includes: bpm (ie. 128), confidence (0-1), calibrating (true/false),
treshold, tempocounts, foundpeaks and peaks
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(inner) groupNeighborsByTempo()
map found intervals together and returns 'tempocounts', a list of found
tempos and their occurences
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(inner) init()
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(inner) initializeAutoBpm()
initialize autobpm, after Addon#AudioAnalysis.initializeAudio
start the Addon#AudioAnalysis~sampler
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(inner) sampler()
gets the analyser.getByteTimeDomainData
calculates the tempodata every 'slowpoke' (now set at samples 10/s)
returns the most occuring bpm
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(inner) update()
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