A Vocoder

signal Amplitude [8] {
        default:        0.0
        rate:           AudioRate
        reset:          MasterReset
        meta:           'Envelope tracker - Synthesis level control'
}

constant CarrierFundamental {
        value:  440
        meta:   'Carrier oscillator frequency'
}

constant Analysis_BP_Freq [8] {
        value:  [200, 275, 425, 675, 1025, 1475, 2025, 2675]
        meta:   'Center frequencies - analysis BP filters'
}

constant Synthesis_BP_Freq [8] {
        value:  [200, 300, 400, 600, 1000, 2000, 4000, 8000]
        meta:   'Center frequencies - synthesis BP filters'
}

constant Analysis_Q_Factor [8] {
        value:  [4.0, 2.8, 2.1, 2.3, 2.6, 3.0, 3.4, 3.9]
        meta:   'Q factor - analysis BP filters'
}

constant Synthesis_Q_Factor [8] {
        value:  [4.0,3.0,2.2, 2.4, 2.8, 3.2, 3.4, 3.6]
        meta:   'Q factor - synthesis BP filters'
}

AudioIn[1]
>> BandPass (
        centerFrequency:        Analysis_BP_Freq
        qFactor:                Analysis_Q_Factor
        reset:                  off
        bypass:                 off
)
>> Rectify (
        mode:   Full
        bypass: off
)
>> LowPass (
        cutOff: 5
        reset:  off
        bypass: off
)
>> Amplitude;


Oscillator (
        type:           'Saw'
        amplitude:      1.0
        frequency:      CarrierFundamental
        phase:          0.0
        reset:          off
)
>> BandPass (
        centerFrequency:        Synthesis_BP_Freq
        qFactor:                Synthesis_Q_Factor
        reset:                  off
        bypass:                 off
)
>> Level (
        gainType:       'Linear'
        gain:           Amplitude
        offset:         0.0
        bypass:         off
)
>> Mix ()
>> AudioOut[1:2];