AudioParameterChoice example

KoSv · August 28, 2017, 12:47pm

hi guys,
could someone please provide an example on how to use the AudioParameterChoice inside audio plugin and access and modify the values from the editor?
thanks!

KoSv · August 29, 2017, 10:46am

no one?

t0m · August 30, 2017, 3:10pm

The DSP plug-in demo uses the AudioParameterChoice class:

github.com

WeAreROLI/JUCE/blob/master/examples/DSP%20module%20plugin%20demo/Source/PluginProcessor.cpp#L45


                   .withOutput ("Output", AudioChannelSet::stereo(), true)),

   lowPassFilter  (dsp::IIR::Coefficients<float>::makeFirstOrderLowPass  (48000.0, 20000.f)),

   highPassFilter (dsp::IIR::Coefficients<float>::makeFirstOrderHighPass (48000.0, 20.0f)),

   waveShapers { {std::tanh}, {dsp::FastMathApproximations::tanh} },

   clipping { clip }

{

// Oversampling 2 times with IIR filtering

oversampling = new dsp::Oversampling<float> (2, 1, dsp::Oversampling<float>::filterHalfBandPolyphaseIIR, false);



addParameter (inputVolumeParam        = new AudioParameterFloat ("INPUT",  "Input Volume",       { 0.f, 60.f, 0.f, 1.0f },     0.f,     "dB"));

addParameter (highPassFilterFreqParam = new AudioParameterFloat ("HPFREQ", "Pre Highpass Freq.", { 20.f, 20000.f, 0.f, 0.5f }, 20.f,    "Hz"));

addParameter (lowPassFilterFreqParam  = new AudioParameterFloat ("LPFREQ", "Post Lowpass Freq.", { 20.f, 20000.f, 0.f, 0.5f }, 20000.f, "Hz"));



addParameter (stereoParam             = new AudioParameterChoice ("STEREO", "Stereo Processing", { "Always mono", "Yes" },             1));

addParameter (slopeParam              = new AudioParameterChoice ("SLOPE", "Slope",      { "-6 dB / octave", "-12 dB / octave" },      0));

addParameter (waveshaperParam         = new AudioParameterChoice ("WVSHP", "Waveshaper", { "std::tanh", "Fast tanh approx." },         0));



addParameter (cabinetTypeParam        = new AudioParameterChoice ("CABTYPE", "Cabinet Type", { "Guitar amplifier 8'' cabinet ",

                                                                                               "Cassette recorder cabinet" },          0));



addParameter (cabinetSimParam         = new AudioParameterBool ("CABSIM", "Cabinet Sim", false));

KoSv · August 30, 2017, 7:23pm

nice! thanks!

drollie · March 2, 2021, 9:00pm

Hi, that link seems to be broken Can anyone please supply a new link to this kind of info?

cheers, Ollie

balthus89 · April 12, 2022, 9:43am

Maybe I found something: https://isrc.iscas.ac.cn/gitlab/mirrors/github.com/weareroli_juce

reuk · April 12, 2022, 10:03am

The official JUCE repository is now here:

The relevant line/file is here:

github.com

juce-framework/JUCE/blob/068dffdb8c23222b5411233ff040e59350cb725f/examples/Plugins/DSPModulePluginDemo.h#L317

      
        
            };

            

            struct DistortionGroup

            {

                explicit DistortionGroup (AudioProcessorParameterGroup& layout)

                    : enabled (addToLayout<AudioParameterBool> (layout,

                                                                ID::distortionEnabled,

                                                                "Distortion",

                                                                true,

                                                                "")),

                      type (addToLayout<AudioParameterChoice> (layout,

                                                               ID::distortionType,

                                                               "Waveshaper",

                                                               StringArray { "std::tanh", "Approx. tanh" },

                                                               0)),

                      inGain (addToLayout<Parameter> (layout,

                                                      ID::distortionInGain,

                                                      "Gain",

                                                      "dB",

                                                      NormalisableRange<float> (-40.0f, 40.0f),

                                                      0.0f,

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AudioParameterChoice example

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AudioParameterChoice example

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