What do I set volume "X" to?

Although I have been able to muddle thru, I wonder if there is a best ratio to use when there is a series of volume controls on devices? For example, my media player Has a volume control. As does my computer. Which is connected to my TV via hdmi. My TV feeds to my receiver / amp. That is 4 volumes total. ... show more Although I have been able to muddle thru, I wonder if there is a best ratio to use when there is a series of volume controls on devices?
For example, my media player Has a volume control. As does my computer. Which is connected to my TV via hdmi. My TV feeds to my receiver / amp. That is 4 volumes total.

Should all but the last one be at full?
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