It is my inner voice. I am also anauraliac, and can't hear anything other than my inner voice. It doesn't have any instrumental accompaniment, and doesn't have any volume or pitch.

If I can remember the words I can recite them, and I can have a vague sense of going up or down, faster or slower if I can remember how the song goes. But I can't hear it. There is no voice, I don't hear the words in my head. I don't hear pitch changes in my head, it's more like I've put a mental note on top of the lyric and I make my brain think both pieces of information together. My brain doesn't do this on it's own. Sometimes it can be easier to keep a song going in my head, but my brain doesn't do it automatically. Getting a song stuck in my head is more like having an intrusive thought of a few lyrics making me keep repeating them in my head.

I hear the artist singing the song, or the sound of the instruments. I can't multitask both though.. the songs tend to be instrumental, then the beat goes when the lyrics kick in, and comes back in periods of non singing Take Tina Turner's - What's love got to do with it. I can mentally remember and sing a lot of the lyrics.. but I didn't have a clue whatsoever what the backing beat was. Just listened to it on youtube and yeah I had no recollection of that at all.. so it's like it's actually my memory only records certain bits of it too.. is odd, apparently I remember lyrics and solo instrumental bits between and blah, but if they were all interlayed, I would struggle to figure out the backing beat Whereas I can hear all of the intro music to Final Countdown just fine

Rereading the tweets I realise when I read another’s words I am not reading them in my own voice, I read it in a male or female voice depending on who tweets, or a neutral voice. I realise I do talk to myself or think to myself, in my own voice

I think with my own voice, but I sometimes think it concepts that feels more 3D and only partly based on words. I don’t think in pictures (as I have aphantasia) but I can rearrange thought forms in my head not based on images it’s more kinaesthetic/ topographical I think. otherwise I do hear a tune in my head and I’m actually hearing the piece, the melody/ the instruments & the sound of the singers voice if there is one. I’m not singing the song.