Anyone knows is there any objective audio quality metric which can be applicable for the parametric codec, such as AAC+, and eAAC+.

In addition, can PEAQ be applied in the assessment for parametric codec?

Thank you very much.

You can simply try yourself. There is enough of publicly available subjective tests of AAC HE and AAC HEv2.

Thanks very much.
Could you please tell me where I can get the aubjective results and the corresponding employed test sequences? Thank you.