According to *Tom's Hardware guide* your M/Board is the same chipset as the following, so you could try a sound driver for this board.
MSI Pro266 master (Ms-6366): Combination solution
BIOS: Award V1.0B10 (15.02.2001)
Board revision: N1996
Huawei P10 review
1995-2015: How technology has changed the world in 20 years
An overview: What leading creative agencies are doing to improve diversity
New iPad, iPhone SE & Red iPhone 7 on sale now
Synology invites you to visit them at Insomnia on 26th – 29th August. Book your tickets now and visit Synology.