typedef enum { MM_MIX_8KHZ, MM_MIX_10KHZ, MM_MIX_13KHZ, MM_MIX_16KHZ, MM_MIX_18KHZ, MM_MIX_21KHZ } mm_mixmode;
8KHz mixing rate, provides poor quality.
10Khz mixing rate, provies low quality.
13Khz mixing rate, provies almost OK quality.
16Khz mixing rate, provies OK quality, standard setting.
18Khz mixing rate, provies better quality, higher CPU load.
21Khz mixing rate, provies even better quality, highest CPU load.
Software mixing rates for GBA system.