Revert "Volume listener accounts for 25 possible volume steps"

#define AUDIO_PLATFORM_API_H

#include "voice.h"

#define MAX_VOLUME_CAL_STEPS 25

#define MAX_VOLUME_CAL_STEPS 15

#define CODEC_BACKEND_DEFAULT_SAMPLE_RATE 48000

#define CODEC_BACKEND_DEFAULT_BIT_WIDTH 16

#define CODEC_BACKEND_DEFAULT_CHANNELS 2