Sitemap This is a self-installing package like the DECtalk version, but this package is about 200 MB in size, so only users of high-speed Internet connections should download it. Your computer must have at least a 400 MHz processor and 192 MB of RAM to use this version of the software. We recommend that you have 256 MB of RAM. The advantage of this version is that the AT&T NaturalVoices synthesizer sounds much more natural than DECtalk. Note that since we need to keep the download relatively small, the voice in this package has a lower sampling rate than the voice in the CD-ROM version, so if you get the software on CD-ROM then the voice will sound better.