Then you misremember - Cari is a master at melding subtle (and occasionally not-so-subtle) sounds with the perfect music for each scene. He doesn't simply play a rotating track of 8 or 10 or 20 songs that really have little to do with whatever scene may be playing. Maybe you have the sound slider too low or the music slider too high, but this VN is the whole damn package, and that takes time to make. He took a little longer after taking a break for the last release, but he's supposed to be back on about a 6 month release schedule. My benchmark for playtime for a high quality, well produced VN is about a half hour to forty five minute of single-run game play for each month of development, and Cari hasn't disappointed yet. I'm also a reader, not a skip-to-fap guy, so I enjoy the time and story as well as the scenery. I also don't speed read, but read at a conversational pace for a normal human being - not ultra fast nor slow and drawl-ly, unless that's consistent with the background of the character.
If you still have the last release on your device, open it up and do a replay of one of the scenes and if you aren't hearing sound effects, check you volume settings. I usually turn the music slider down to around 60% and have sound slider up at about 80% in most VNs, including this one, to get the balance I like.