In an other post I said it was working with Onkyo DP-X1A but in fact it does not I tried to apply this trick
http://forum.powerampapp.com/index.php?/topic/8735-requests-for-hi-res-support/&page=6#comment-34753
it is not working Probably because of a software update here some links witch can be useful to help to implement Power-amp V3 on Onkyo the first one from Pergasus21 http://www.head-fi.org/t/780642/onkyo-dp-x1-dual-sabre-dacs-balanced-sabre-btl-amp-mqa-dsd-256-android-5/3480#post_12254387
and this one from ironFly showing the issue showing in a logcat
http://www.head-fi.org/t/780642/onkyo-dp-x1-dual-sabre-dacs-balanced-sabre-btl-amp-mqa-dsd-256-android-5/13815#post_13264879
Please fix it for the Onkyo DP-X1A Hi res player