"What if I need to do any further editing? Can I use IDR again? Can I use it with another dither algorithm?"Waves IDR technology can be used over itself or in conjunction with any other dither algorithm. Therefore if it is necessary to use it multiple times you can without fear of harmful side effects. We do suggest that if any further editing is required to use normal noise shaping
Yes, CEP does that if you have the option "Dither Transform Results (increases dynamic range)" in Settings --> Data.cya
I've noticed that Cool Edit, for example, will dither when you simply amplify a wav (in 16-bit mode).