Audio Cassettes to CD quickly

I’ve read on here about people using the line in on the sound card to create digital files (wav or mp3) for converting cassettes to CDs. I don’t have the time to do this “real time”. I’ve seen some info on the Plusdeck, but it doesn’t tell if it is “real time” as well or if it is something you can use unattended. Anyone have any info on Plusdeck OR some other alternative?