Tim Gillett wrote:...how will the expander know that piano stool squeaks arent actually harmonics on treble key notes?
Hopefully the unwanted squeaks will be sufficiently lower in level compared to the harmonics while playing to allow adequate threshold deteminations, but there will obviously be a crossover range where the expander will start to detract from the piano tone and speed the decay of notes. Hence my suggestion that it might help rather than cure...
Obviously the configuration need some experimentation and care to set up for optimal results, but I've used this arrangement a lot to help minimise the intrusion of unwanted background sounds in live broadcast/recording situations -- although not, I must say, for solo classical piano -- but I have used it in on-stage band situations very effectively.
The correct approach is obviously to replace or fix the squeaky bench... but over-the-top technological solutions to simple mechanical problems always seem more popular than the bleedin' obvious... so who am I to argue! :lol: