danboid wrote:You mean like I documented here?
Its a good point though and when you said that I was sure I had mentioned this in the ALSA chapter but, if I did, it has been edited away since but its there now. The relevant paragraph now reads:
In the bottom right corner of the mixer window there is a tool icon. This icon allows you to configure which channels are available to control for the currently selected kmix device tab. You may find that some controls you need are missing at first, so you may add them via this Configure Channels window. A common example of when you might need to use the kmix Configure Channels window is if you are using any SPDIF (optical) ports, which are referred to as IEC958 devices under GNU/Linux, as such controls are often not displayed by default.