I just read your post and the good replies to it. Here are my thoughts on this as well.
You might consider installing and using "qasmixer" and the other "qas" programs from the Software Manager or Synaptic Package Manager (SPM).
There are some really nice graphical (GUI) programs for sound that start with "Qas", like the fantastic "Qasmixer", in the Software Manager or Synaptic Package Manager (SPM) that you can install and use. Sound "Mixers" can be a little confusing if you are not familiar with them. If you bring up "Qasmixer" full screen, on the right side you will have mixer devices where you can control your system sound. The item "sysdefault" will show all installed sound card devices and you will have various options to adjust various volume controls using "sliders" which you can turn off and on using the "dot" below the volume slider. There are also various other check boxes below that you can use.
The applications included are:
- qasconfig - browser for the alsa configuration tree
- qashctl - mixer for alsa's high level control interface
- qasmixer - desktop mixer with features similar to alsamixer
qasmixer is a desktop mixer application for alsa's "simple mixer interface" and offers features similar to alsamixer. it also features a sytem tray icon with basic mixer functionality.
Install "libasound2-plugin-equal" which is another system wide equalizer that's in the Software Manager or Synaptic Package Manager (SPM) that shows up in "QasMixer".
Veromix is a "superb" mixer for the Pulseaudio sound server.
Works with all editions of Linux Mint and is in the Software Manager or Synaptic Package Manager (SPM). KDE users should install this as a widget.
– Media Player Controls (aka nowplaying)
– per application volume control (replay & record)
– global hotkeys
– can be in your system tray
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Hope this helps ...