wpass filters with the same
        // parameters.
        let biquad1 = context.createBiquadFilter();
        biquad1.type = biquadType;
        biquad1.frequency.value = biquadCutoff;
        biquad1.Q.value = biquadQ;

        let biquad2 = context.createBiquadFilter();
        biquad2.type = biquadType;
        biquad2.frequency.value = biquadCutoff;
        biquad2.Q.value = biquadQ;

        let iir = context.createIIRFilter(cascade.ff, cascade.fb);

        // Create the merger to get the signals int