Never had an issue with this until I recently got a new in car 2 din. Primo (and iGO8 ) voices are too low with no setting to adj separately the levels in the unit.
Voices are set on max in Primo.
All ref in sys.ini are at 255
alert_volume="255"
dynamic_volume_maxspeed="120"
dynamic_volume_minspeed="60"
dynamic_volume_os_amplification_step="5306150"
dynamic_volume_type="1"
dynamic_volume_voice_volume_max="63"
dynamic_volume_voicemaxspeed="0"
effect_volume="255"
media_volume="255"
os_muted="0"
os_volume="255"
voice_volume="255"
In sys.txt ive tried (made no difference)
compressor=1
a0=56806
thrs=24703
ratio=8
gain=12 ...