If you're asking when is this going away? Not anytime soon. It's worsening currently by the percentage of growth both in the US and Texas. I know of a band director today who tested positive... It's hopefully a situation where you're not one of the 20% who develop heavier symptoms, or the 5% who end up hospitalized. At the rate we're going in Texas we'll be above 10k cases a day again by Thanksgiving. We were knocking on the 10k door on Wednesday and Thursday's case counts. Our seven-day average as of yesterday was 7500 new cases per day. Add in Thanksgiving Break, family's coming together, and I think you're going to see December as a very bleak month.
If you have no real community spread right now in your town you could probably do a small group spaced out with masks. But if you have community spread, or no masks, there's no way in hell I'd be doing singing. Face shields don't count by the way, aerosols flow just fine around them. It might stop a direct spit at you, but does nothing for the smaller particles that are more worrisome.
I'm hoping the University of Colorado will present its final report here soon. There may be better data to assess your question there too. As far as the pandemic going away? We're doing nothing to change openings right now, so the equation is going to keep worsening. My guess is it's really bad by December, people grow some brains and change behaviors for a bit, and it decreases again until March/April for a smaller wave. If they can start distributing a vaccine in January or February I'm hoping next school year will have potential of being more normal. Listening to experts though, we may not see 'normal' again until 2022.