text: #pragma once
  
  #include <stdint.h>
  
  // reserved for main audio channel mixer, PAT2SMP and MOD2WAV
  void clearMixerDownsamplerStates(void);
  double decimate2x_L(double x0, double x1);
  double decimate2x_R(double x0, double x1);
  // --------------------------------------
  
  // Warning: These can exceed -1.0 .. 1.0 because of undershoot/overshoot!
  void downsample2xFloat(float *buffer, uint32_t originalLength);
  void downsample2xDouble(double *buffer, uint32_t originalLength);
  
  // Warning: These are slow and use normalization to prevent clipping from undershoot/overshoot!
  bool downsample2x8Bit(int8_t *buffer, uint32_t originalLength);
  bool downsample2x8BitU(uint8_t *buffer, uint32_t originalLength);
  bool downsample2x16Bit(int16_t *buffer, uint32_t originalLength);
  bool downsample2x32Bit(int32_t *buffer, uint32_t originalLength);
  