no volume control


I am running Hifiberry Dac plus DSP on raspi 3b.

When I start right after install, I get mono sound since i2s is not enabled. Then I go to config.txt enable i2s and correct dtparam ,not sound or any mixer available ( amixer output is blank) . I install Python 3.5.2 and PIP, stereo sound but Volume control is missing. There is only one mixer

volumio@volumio:~$ amixer
Simple mixer control ‘SoftMaster’,0
Capabilities: volume
Playback channels: Front Left - Front Right
Capture channels: Front Left - Front Right
Limits: 0 - 99
Front Left: 99 [100%]
Front Right: 99 [100%]

I have reinstalled Volumio2 about 4 times now … Please help