I just recently completed a Mod of my Pioneer Elite CLD-97 Laserdisc player to allow for AC3 output. For those of you not familiar with this, AC3 is essentially Dolby Digital 5.1. The last generation of Laserdiscs produced had an AC3 track that when output to a demodulator allowed for standard Dolby Digital 5.1 surround sound. Although this is no big deal now, it really was a big deal at the time as DVD's were not out yet, and the competing format was VHS that was stereo only. It was only later in the Laserdisc life span that they started using AC3 and only a few of the last players released had AC3 output built in. The CLD-97 is considered one of the best players available in terms of picture quality but did not have an AC3 output. A shortcoming that has now been remedied!
I collect Laserdiscs and really enjoy the hobby. If at all interested take a look... Comments and suggestions always welcome!
Guide with pictures and download link