Dear experts,
right now I'm watching a Youtube movie and the sound is on and at maximum in the browser.
On my Thinkpad T60 I have also pressed the volume up hardware button as often as possible.
Now I'm curious if there are some advanced sound settings, so I can check if the sound level is really at maximum or if I can make it even louder.
Operating system is Debian Linux Jessie 8.6(?) 32-bit and it's up-to-date :rolleyes:
Window manager: XFCE4
Regards,
JH
What GUI volume control is available depends on your window manager.
You could also try alsamixer / amixer in console.
Great! Both commands worked. Thanks. Now I just need to find out how to adjust the volume in the console 
My window manager is XFCE4, somehow I can't find any simple and suitable application. Gotta apt-cache search for sound or something 
$ amixer
Simple mixer control 'Master',0
Capabilities: pvolume pswitch pswitch-joined
Playback channels: Front Left - Front Right
Limits: Playback 0 - 65536
Mono:
Front Left: Playback 49810 [76%] [on]
Front Right: Playback 49810 [76%] [on]
Simple mixer control 'Capture',0
Capabilities: cvolume cswitch cswitch-joined
Capture channels: Front Left - Front Right
Limits: Capture 0 - 65536
Front Left: Capture 13850 [21%] [on]
Front Right: Capture 13850 [21%] [on]
$
AlsaMixer v1.0.28
Card: PulseAudio F1: Help
Chip: PulseAudio F2: System information
View: F3:[Playback] F4: Capture F5: All F6: Select sound card
Item: Master Esc: Exit
OO
76<>76
< Master >
EDIT: alsamixergui works!
Not sure if " Applications Menu -> Multimedia -> Audio Mixer " was there before I've installed alsamixergui 
(
However, problem solved.