According to https://ilovepa.ws/2017/06/08/aztech-sound-cards/ your I38-MMSN842 was made for Packard Bell and uses an AZT2316R .
Here are other cards using the same chipset :
I38-MMSN841 Packard Bell 030084, Packard Bell 030094, Packard Bell 030099 AZT2316R Pro 2.0 None Modem
I38-MMSN842 Packard Bell 030101, Packard Bell 030111 AZT2316R Pro 2.0 None Modem
I38-MMSN843 Packard Bell 030106 AZT2316R Pro 2.0 Onboard Modem
I38-MMSN845 Sound Galaxy Pro 16 II AZT2316R Pro 2.0 Header, Expcon CDROM
I38-MMSN846 Sound Galaxy Nova 16 Extra II-3D, Trust Sound Expert DeLuxe 16-3D (06300) AZT2316R Pro 2.0 Header CDROM
I38-MMSN847 Sound Galaxy Waverider Pro 32-3D, Trust Sound Expert DeLuxe Wave 32-3D (06301) AZT2316R Pro 2.0 Onboard CDROM
I38-MMSN852 Sound Galaxy Waverider Pro 32-3D AZT2316R Pro 2.0 Onboard CDROM
I38-SN96103 Multimedia Pro 16 IIB-3D AZT2316R Pro 2.0 Header CDROM
Short of finding original Packard Bell drivers, your best bet would be to use drivers meant for a card using the same chipset (AZT2316R) and that looks as similar as possible to your card . Drivers can be found here http://vogonsdrivers.com/index.php?catid=3
EDIT: My first choice would be the I38-MMSN845 Sound Galaxy Pro 16 II AZT2316R Pro 2.0 Header, Expcon CDROM