I play bass, sequence bass, sing harmony, write songs along with our guitarist/singer, do some mixing and production, bit of keys, etc. Sometimes guitar when we're recording. We don't have very defined roles especially when recording - sometimes our guitarist will track bass guitar, sometimes I'll track guitar, we both get together to do the programming and automation usually, it's all quite relaxed. Live though I'm bass, synths (again mostly bass) and harmony vox.