After switching both the Kodi and the alsamixer volumes are turned up:
Simple mixer control 'Master',0 Capabilities: pvolume pswitch pswitch-joined Playback channels: Front Left - Front Right Limits: Playback 0 - 65536 Mono: ** Front Left: Playback 65536 [100%] [on]** ** Front Right: Playback 65536 [100%] [on]** Simple mixer control 'Capture',0 Capabilities: cvolume cswitch cswitch-joined Capture channels: Front Left - Front Right Limits: Capture 0 - 65536 ** Front Left: Capture 65536 [100%] [on]** ** Front Right: Capture 65536 [100%] [on]**
Any other ideas?