Delay effect in Web Audio API, but it kills Chrome...

gistfile1.coffee

class @FX
    constructor: (@ctx) ->
        @in = @ctx.createGain()
        @in.gain.value = 1.0
        @out = @ctx.createGain()
        @out.gain.value = 1.0
        @view = new FXView(this)
   
    connect: (dst) -> @out.connect(dst)
    disconnect: () -> @out.disconnect()
    setInput:  (d) -> @in.gain.value = d
    setOutput: (d) -> @out.gain.value = d
                                    

       
class @Delay extends @FX
                                                
    constructor: (@ctx) ->
        super(@ctx)
        
        @delay = @ctx.createDelay()
        @delay.delayTime.value = 0.23
                                                            
        @lofi = @ctx.createBiquadFilter()
        @lofi.type = "peaking"
        @lofi.frequency.value = 12
        @lofi.Q.value = 0.0  # range is [0.0, 5.0]
        @lofi.gain.value = 1.0
                                                                        
        @feedback = @ctx.createGain()
        @feedback.gain.value = 0.2
       
        @in.connect(@lofi)
        @lofi.connect(@delay)
        @delay.connect(@out)
        @delay.connect(@feedback)
        @feedback.connect(@lofi)