### Basic info EVS initilization of shb CNG parameter leads to incorrect startup interpolation in dB domain, likely not BE in in cng_dec.c line 858 "hTdCngDec->last_shb_ener = 0.001f;" in cng_dec.c line 732 " ener = hTdCngDec->shb_cng_ener + sin_table256[i] * ( **hTdCngDec->last_shb_ener -** hTdCngDec->shb_cng_ener );" The last_shb_ener , should be initialized to something like -82 in dB domain corresponding to a received shb energy index index0(-15), while it now is initialized to 0.001f - Commit SHA: c42f42580633312595edfd54eb80373b5c9e2fff - - Platform: MSVC and LINUX ### Bug description initialization error for EVS SHB CNG and IVAS -stereo shb CNG ### Ways to reproduce (Clear steps or refer to a failing automated test, e.g. with a pipeline link) see inactive define //#define FIX617_UBSAN_DIVBYZERO_STEREOCNG_LAST_SHB_ENER_INIT in https://forge.3gpp.org/rep/ivas-codec-pc/ivas-codec/-/tree/617-ubsan-division-by-zero-in-stereo-cng-when-inut-is-16khz-and-output-is-32khz run: ``` ./IVAS_cod -STEREO -dtx 24400 16 ./scripts/testv/stvST16nwav bit ./IVAS_dec stereo 32 bit out.wav and break at line in cng_dec.c line 732 " ener = hTdCngDec->shb_cng_ener + sin_table256[i] * ( **hTdCngDec->last_shb_ener -** hTdCngDec->shb_cng_ener );" ``` <!--- Below are labels that will be added but are not shown in description. This is a template to help fill them. Add further information to the first row and remove and add labels as necessary. -->