It lost a tick or two (at hero) a while back. I don't think it was all that recently.

Probably what's being seen more is that its duration can vary a *lot* based on a bunch of different factors, including:

- Everything that can affect sing in general, which isn't a short list
- The instrument
- The repertoire (I don't think what's good for sleep is what people think is good for sleep, but I may be wrong)
- State of the victim
- Repeated sleep attempts (like sleep spell) in a short period get weaker/shorter