whether or
things like
and … so on
Structure
- Verb[る] + やら
- Noun + やら
- いAdj + やら
[Used to list non-exhaustive examples, means, reasons・Often has a nuance of the speaker being uncertain as to which ones to choose from within a larger group]
Does the usage/nuance of やら～やら change at all when the sentence only involves one やら? Does it function similar to など?
Also, is the difference between やら～やら and とか～とか that とか involves items the listener knows isn’t exhaustive whereas やら doesn’t do this? A little confusing, so many seemingly similar points involved 
やら does not change nuance even if it only involves one やら. やら～やら is also used for exhaustive lists. The main difference between やら and とか is that とか does not have any emotion attached to the list. However, やら can sometimes have a very slight nuance of annoyance.
毎晩のように隣の部屋から、音楽とか怒鳴り声が聞こえてくる。
Almost every night, I can hear things such as music and yelling from the apartment next door. This sentence has not emotion attached to it and sounds like the speaker is laying out facts.
毎晩のように隣の部屋から、音楽やら怒鳴り声が聞こえてくる。
Almost every night, I can hear things such as music and yelling from the apartment next door. This sentence has the nuance that the speaker is sick and tired of the music and the yelling he can hear almost every night.
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