dtmf_col 77 src/libteletone_detect.c static float dtmf_col[] = {1209.0f, 1336.0f, 1477.0f, 1633.0f}; dtmf_col 116 src/libteletone_detect.c theta = (float)(M_TWO_PI*(dtmf_col[i]/(float)sample_rate)); dtmf_col 122 src/libteletone_detect.c theta = (float)(M_TWO_PI*(dtmf_col[i]*2.0/(float)sample_rate));