* The system volume (set via the slider in System Settings / Sound, or via the volume hard keys) is taken into account when playing DTMF tones.
* The 'DTMF_VOLUME' variable in /usr/share/upstart/sessions/tone-generator.conf is taken into account as well.
* This is the case for the dial tones (before a call), and the local playback of DTMF tones during a call, both when routed to earpiece or to loudspeaker.
The default value 'DTMF_VOLUME=20' is pretty loud. If the other system-wide volumes stay unchanged, I'd suggest a change to '10' or thereabouts.
Tested in mako HW, image 188:
* The system volume (set via the slider in System Settings / Sound, or via the volume hard keys) is taken into account when playing DTMF tones.
* The 'DTMF_VOLUME' variable in /usr/share/ upstart/ sessions/ tone-generator. conf is taken into account as well.
* This is the case for the dial tones (before a call), and the local playback of DTMF tones during a call, both when routed to earpiece or to loudspeaker.
The default value 'DTMF_VOLUME=20' is pretty loud. If the other system-wide volumes stay unchanged, I'd suggest a change to '10' or thereabouts.