https://www.es.oldversion.com/windows/ac3filter/ac3filter-1-51a/
Download AC3Filter 1.51a for Windows - OldVersion.com
AC3Filter is a DirectShow filter for AC3 decoding to play AVI files with AC3 and MPEG2\(DVD\) audio tracks. **AC3Filter Features** * Full AC3 standard ...
for windowsdownload
https://www.digital-digest.com/dvd/downloads/showsoftware_ac3filter_281.html
AC3Filter 2.6.0b | Software - Digital Digest
An open source DirectShow AC3 decoder filter
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