Very unlikely. The A4 has DCOs that are implemented more or less as described in http://www.electricdruid.net/?page=info.junodcos and/or Sequence 15: Analyzing the Juno-106 DCO circuit
The fact that they’re digitally controlled doesn’t mean they’re D/A convertors; the implementation is actually much more “analog” than the name might suggest.
Maybe the noise source could be used as a D/A convertor even though it’s not very likely.