A very elementary layman's question: With computer sound, there are multiple and apparently independent volume controls: For example: Windows Media Player has a volume control, the computer sound card has a sound control, and my external speakers have their own volume control. Do these work in series and are they really independent of each other? Is it better to have a high volume setting inside the computer with low volume externally, or vice versa? I am a little naive about this. Would appreciate some learning about this. Thanks.