Q1: What's the difference between "oh", "oh-oh", "woah", etc?
XP: "Oh" should be just one syllable if that's how it's sung, likewise "Oh-oh" - you can also think of it as "do-re-mi", and shouldn't be transcribed as just "do". In the course of an entire song, you may be able to pick the "w" sound at the start of the "woah". I would listen to those same sections for the "oh" and "woah" if there's a "w" coming in, otherwise, it would be "oh". I'm going to use this song as an example because it took me a while to find out its name after I found myself humming this part for days "I still dial 822-993-167", this opening lyrics should be: "Oh-oh-oh-oh, there was Heaven in your eyes". Another example I would like to add is "ohh"; I've used this when it's being vocalized, instead of just "oh".
SAN-E:
Q2: Sometimes I'm not certain what sounds can be transcribed, e.g. "uh" (I could send an example later but from memory it comes up a bit in some of the Six60 songs I've been trying to fix up recently), also should "um" be transcribed when an artist is speaking in a live performance on streaming because thus far I haven't but a while back someone edited the lyrics of one of those that I'd worked on which included adding that in.
XP: You can transcribe as the artist says it; "uh", "um", etc. but if it's sort of like no specific sound to guide you from the start, I think that's like them vocalizing or humming a tune so you leave it out. If it's like after a section e.g [Chorus], [Bridge], then a section could be added e.g [Vocalising Chorus], [Vocalising Bridge].
SAN-E:
Q3: "mhm" vs "mm" vs "hmm", maybe I'm missing something but I don't recall this one being mentioned in the scribing guides (vs. things like woah and I'ma which I recall, maybe I just haven't checked in a while).
XP: I can't remember seeing "mhm" but for "mm" vs "hmm"; I've mostly used "mm" but while listening to some songs there's a difference in the intonation so I switch to "hmm". I would give this example for clarity: "hmm-mm" high pitch to low pitch, and "mm-mm" low pitch to still the same low pitch.
Q4: When do lyrics go in brackets besides ad-libs, vs. no brackets, for example if it's really faint at the end of the track (I wrote this some time ago so I don't recall the particular example I had in mind)
XP: Yes, if it's really faint, e,g at the end of the chorus, the last line(s) could be repeated.
SAN-E:
Q5: On the topic of brackets, should it be one set per line or one for several lines if we have several in brackets? I think mostly I do the former but there certainly exist past work that's done the latter
XP: I do one set per line and when there are several lines I switch to italics, like for fading/very faint vocals most common in [Outro]. I think of it like it's a second artist even though it may be from the same artist, differentiating it from how the entire song was sung.
SAN-E:
Q6: I've looked through the guides quite a bit on tags like [Instrumental], [Guitar Solo], [Instrumental Intro], etc, but still feel a bit confused about when to use these; if it's in the middle of a song and ~1min+ should it be [Instrumental Break]?
XP: Per [Instrumental Break], yes, if it's less than a minute and in the middle. I would add [Instrumental Break] from like 15 seconds and if it's distinct when it's less than 15 seconds. Also, if you know the exact instrument being played you can specify instead e.g [Guitar Solo], [Piano Solo], etc.
SAN-E:
Q7: The [Refrain] tag is a little confusing to me as in when to use it, previously I always saw refrain as I guess what people call [Post-Chorus], but when the lines are repeated; the guide specifically mentions it as something that comes at the end of a verse though, so I think I stopped using it as much but I still see it being used after a chorus all the time.
XP: I think of it as a [Refrain] if it's like a very catchy part ("hook") in the chorus. I think this part of an answer I found catches it:
A refrain is mostly like a verse but instead of leading into a full blown chorus it has one line that contains the hook which is repeated lyrically and melodically. Smoking Gun by Robert Cray is the example that came to mind first.
SAN-E:
Q8: Whether to transcribe if it's not v audible and not part of official lyrics anywhere another example I can think of is drivers license at the end of the bridge she shouts something but I've never been able to hear what it actually is.
XP: If it's not very audible, leave it out. I remember adding some part to a lyrics that was really really faint within the background music that sort of veers into you being imaginative of what the lyrics is and it got removed lol
SAN-E: