A couple of absolutes: (1)Conversion to MP3 will result in significant loss of audio fidelity, but it's a loss most people can live with and, perhaps, don't hear. (2)A minority of computer users have the hardware/software knowledge to convert their cassettes and LPs to a digital format which will allow them to listen to this music on their MP3 players. Analog to digital conversion may be simple for some, but for most people, their analog music library is lost when their analog playback machines cease to function.
The Teac AD-800 is not a do all, be all for everyone wishing to convert their analog library to digital media. What it does do, however, is provide a very simple process of moving analog information recorded on cassette to a USB flash drive in MP3 format. Once in MP3 format, the digital media can be easily moved to a computer hard drive, cd, cd-r, MP3 player, etc. It is important to note that there will be audio quality lost as the full spectrum uncompressed audio is moved from the analog cassette to the flash drive in MP3 format. For most listeners, the change is imperceptible and acceptable.
Because there also is the MP3 Codec from the CD and the Aux input, you can also convert CDs and vinyl to MP3 via the USB port and a flash drive. Yes, some procedures are very slow and a pain, when compared to copying digital files directly to digital files. Dubbing analog audio is in real time.
My purchasing confession. I scouted this machine for several weeks before buying one. One of Amazon's "More Buying Choice" vendors, at their website, is offering this deck at $30.00 less than it's shown on the Amazon site from that vendor.
I made this purchase because my pro model Tascam deck, after 25 years of use, died. I have some cassettes that deserve being heard. Also, I like the ability to use the Aux to MP3 codec to convert the audio from HD televised concerts directly to MP3.