Hi,
I would like mute for the first time of repeat section my bass part. How can I do? Thanks
Please look this picture for better understand. I’m french user, sorry for my english.
Fred
Dear Fred,
I’m afraid you cannot do that yet. If you need an accurate playback, you should develop your score (no repeats, everything written as should sound). And second is not written as in French (seconde) 
You may be able to do it with custom playing techniques, along the lines of the attached file. Note changes to the Expression map… in this case the bass switches to an unused midi channel.
(to open the file just remove the .zip extension)
2ndTimeOnly.dorico.zip (727 KB)
Ok thanks !