Audio through HDMI and Monitor sleep

Hello.

I am using my digital receiver Onkyo TX-SR309 to play audio from ASUS P8Z68-V PRO/GEN3 with Core i7 3770K connected with HDMI-HDMI cable.

Here is situation: I am listening radio and don't use OS, so after the idle time in Power managent of user inactivity, OS send in sleep monitor and sound at receiver disappear.

I found only one driver 15.31.18.3272 from ASRock (Graphics 9.18.10.3272 and 6.16.0.3112 audio) that don't stop playing after system enters monitor in sleep after idle.

I try some next and new 15.33.9.3355 but always get lost of sound from HDMI when OS send monitors in sleep.