Reset volume for current selected track

[aerodrink]

Hi everyone,
Just discovered TouchOSC a few days ago and messing around ...
I already got quite a lot of controls running fine (play/stop/locators/mute/solo/arm/volume slider) :



I'd like one of my buttons (the little one in top of the volume slider) to reset volume to 0 dB for current selected track (same as double click).

I've already tried many options (with no success) such as :

/action/4 (with 0.716 as value in From ... & To ...)
/track/volume/0
/track/volume/0.0
/track/volume 0
/track/volume 0.0
/track/volume/db/0
/track/volume/db/0.0
/track/volume/db 0
/track/volume/db 0.0
...

What am I doing wrong ?

Here is the content for my .ReaperOSC file :

REAPER_TRACK_FOLLOWS DEVICE
DEVICE_TRACK_FOLLOWS LAST_TOUCHED

TRACK_NAME s/track/name
TRACK_NUMBER s/track/number
TRACK_VOLUME n/track/volume f/track/volume/db s/track/volume/str
TRACK_PAN n/track/pan s/track/pan/str

TRACK_MUTE t/track/mute
TRACK_SOLO t/track/solo
TRACK_REC_ARM t/track/recarm

DEVICE_TRACK_SELECT t/track/@
DEVICE_PREV_TRACK t/track-
DEVICE_NEXT_TRACK t/track+

RECORD t/record
STOP t/stop
PLAY t/play
PAUSE t/pause

ACTION t/action/@

Thank you for your help !

Olivier

[aerodrink]

Finally found the trick :

First, I had to replace

f/track/volume/db

with :

t/track/volume/@

Then in TouchOSC :