The 15 pin digital output on the 598DP contains exactly the same signals as on the 3 x SPDIF outputs. No need to bother with any VGA converters. The VGA output is (probably a space saving connection for the 568.2mm) only needed when connecting to a 568.2mm The G68/861 uses the phono to phono connectors - a simple component video cable will do.

However, as George says, you are somehow going to need to convert this to analogue. A simple cable will not do it.

I believe the gentleman from Meridian was 'confused'.

Meridian owner since 1992
Prime & PSU, Focal Elear headphones, Roon (ROCK 8Gi5 NUC), Explorer 1 & 2, F80. 200/203, various Sonos (via Roon).