void set_gain(unsigned bus_idx, float value) override;
void set_compressor_threshold(unsigned bus_idx, float value) override;
void set_fader(unsigned bus_idx, float value) override;
void set_gain(unsigned bus_idx, float value) override;
void set_compressor_threshold(unsigned bus_idx, float value) override;
void set_fader(unsigned bus_idx, float value) override;