Now this is something I’ve never done, nor am likely to do, but it’s worth bringing up as it relates to Tip 34. Again, maybe 1% of people who hear your mixes will listen in a quiet room with their head between the speakers. At best it will be with headphones, but they’ll still most likely be doing something else when listening.
The vacuum noise will mask a lot of things. And if your mix is in good shape, you should be able to hear all the important elements over the din of the motor.
I’m not saying to do this, but on the other hand, hey...if it works, do it!