Originally Posted by AustinJerry
Thank you, this is very important information! Do you have any information for the converter, like a part number, or a link to where it can be purchased? This would be a very useful addition to the FAQ.
The following from www.prolific.com.tw
documents the chip versions that are not supported, and their current recommendation.
•Windows 8 is NOT supported in PL-2303HXA/XA EOL (End-of-Life) chip versions.
•Prolific recommends to buy PL-2303HXD (HX Rev D) chip or newer generation chip versions
An example of device that includes the Prolific chip that is supported on Windows 8 and is available from Amazon and others is "TRENDnet USB to RS-232 Serial Converter TU-S9 (White)". The "White" model is "Version v2.0R". Earlier versions (blue or black I believe) may have the chip that is end of life.
I have also used a Keyspan "USA-19HS" USB to RS-232 converter (non Prolific chip) successfully with Windows 8 and Audyssey.
One cautionary note is that original Audyssey RS-232 converter was a male DB-9 end with screw ins for retention. The above two units have a male DB-9 end, but they have standoffs to accept screw ins for retention purposes. The standoffs will prevent mating with the DB-9 connectors on audio equipment such as a Marantz AV-8801. There are two solutions to this problem. Either remove or cut off the standoffs or use a DB-9 extension cable that is designed with screw ins on both the male and female end. An example of a suitable extension cable is http://www.microcenter.com/product/219870/DB9_M-F_Extension_Cable_6_Foot