About 20 years ago I bought some live concert DVDs but the band did not release an audio CD version of it. I wanted to listen to it in my car so I ripped the audio from the DVD but when I made a CD it sounded a little off.
Then I learned that DVD was 48 kHz and not 44.1 kHz so the conversion program I used didn't account for this. I went back and used a polyphase filter to adjust the sampling rate. It sounded normal again but there were some audio glitches at various times.
I went back about 10 years ago and ripped it again and converted it to FLAC which supports multiple sampling rates like 44.1, 48, 96, whatever and now everything sounds good.
Then I learned that DVD was 48 kHz and not 44.1 kHz so the conversion program I used didn't account for this. I went back and used a polyphase filter to adjust the sampling rate. It sounded normal again but there were some audio glitches at various times.
I went back about 10 years ago and ripped it again and converted it to FLAC which supports multiple sampling rates like 44.1, 48, 96, whatever and now everything sounds good.