我最近更换了旧的家庭影院音频系统 (Yamaha DSP-E800 和 Denon 立体声接收器) 通过连接 USB DAC and 6 Onkyo TX-SR605 通道模拟，具有 HDMI 音频连接. 在大多数方面，这是一次即时升级，但有一个问题让我很沮丧——音量……
I was used to having the amplifiers set at a fixed volume and adjusting the level via the PC (双赢DOWS 10) volume control. However with HDMI it seems this doesn’t work. The windows volume control does nothing at all. Googling produced no useful results, just lots of people who can’t get HDMI output to work at all — a classic example of how much worse google has got at finding relevant results now that every commercially backed website has found ways to game it.
It seems the issue is that windows can’t control the volume for anything bitstreamed. But my new amplifier accepts multichannel LPCM so what I want to do is decode any dolby or DTS formats on the PC, control their volume, and then send them as LPCM to the amp.
Thanks to a piece of software I used previously to remap channels I have been able to do exactly that, and get control again. That software is called “Equalizer APO”. Just install it and enable it for your HDMI output and then reboot. One other thing is needed for some programs — Go into the classic “control panel” and open the sound options. Bring up the properties for your HDMI output and then go to the advanced tab. Untick “Allow applications to take exclusive control of this device”.
The final thing I had to do was to change the default power on volume on the Onkyo — which had been set to 45. I changed it to remember the previous. The setting is found in Settings -> 6. Misc -> Volume Setup -> Power on Volume
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