when i deaden myself with weed, no. when i'm sober my imagination can travel in all kinds of avenues and i'll say voices are more likely to come just before sleep and usualy they would be semi-dreamlike and of various intents and tonalities. if i'm awake my mind skews way more to the visual/audial observational and internal conceptual states. when i do have fun and imagine voices is if i utter them, hard for me to imagine this or that at times but if i talk like it the assimilation eases.
if i smoke weed after not doing so for a long time any moment can be profound, any meaningless sequence of coincidental sounds can become a grand abyssal orchestra or a house beat so multi-layered and universal that no machine can capture the depth of it, or a million monks droning droning the same untruth.
But when I think my voice is totally there somewhere in the mind esp. if language is involved. doesn't sound like me but is mind voice. soundless yet merely by being detached from the physicality of communication it can be more flexible imo. but too objective at times---if i want to add emotion to something sometime reading it aloud is the best way to go.