We have not played for a couple of years now ( constraints of my job) but all through my musical life, I have been not only the bass player but also the lead singer. This has posed many problems over the years. Mainly I have to take far longer to learn my parts as I have to learn the bass line, learn the lyrics and then master the art of doing them both at the same time. Obviously, you need to be able to concentrate completely on the singing, therefore you need to be able to play the bass part without thinking about it. Our guitarist used to always say, right lets do this next gig and I would be like, I'm not ready, but he would insist. It used to drive me up the wall.
Do any of you singing bass players have techniques that you use?