SigmaStudio+ does not support all the Codecs available on 2437 Evaluation boards by ADI. Some of the Configuration files used in 2437 A2B schematics are generated using Sigma Studio (en/design-center/evaluation-hardware-and-software/software/ss_sigst_02.html). Refer to this link to understand how to generate configuration files from Sigma Studio.
AD1937 (en/products/ad1937.html) is available on EVAL-AD2437A1NZ and EVAL-AD2437A1MZ platforms. adi_a2b_main_AD1937_AD2437.xml used in A2B schematics is generated using below schematics adi_2437_main_ad1937.zip