I have tried mastering concert recorded in pub with bad sound system (weak HF response), by using the following plugins (in order)
- parametric EQs (spectrum analyzer helped a lot):
140Hz: -8dB: 0.6octave
740Hz: +3dB: 0.7octave
2.4kHz: +3dB: 1octave
16kHz: +4dB: 0.5octave
high-shelving filter: 6kHz: 11dB
- subharmonic synthesis below 150Hz
- multiband compression: attack 200ms, release 400ms
- very slight graphical EQing
- fast lookahead limiter with 100ms release time (kicks in very seldom)
...and it resulted in usable fidelity. Listen for yourself:
https://www.youtube.com/watch?v=0eVT2Bc95Hs
https://www.youtube.com/watch?v=LjxZaoktq3Y
https://www.youtube.com/watch?v=s_L2bcQrfyc
The whole remastered bootleg has DR13.
What could be better in it? What do you recommend to get the best of bootlegs recorded using microphones?