In `ivas_core_encoder_fx()`, there exist two temporary buffers used to store input audio samples: ``` Word16 tmp_input_fx[L_FRAME48k], tmp_old_input_fx[L_FRAME48k], q_inp[2]; ``` It might be possible to remove these buffers or move them out of the worst-case stack consumption. <!--- 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.-->