real-time equalisation?

Hi… is there a way to set up the equalizer while in play-back, listening to the whole song, as if you were using analogue equipment, mixing music in a studio sound booth? (then apply the EQ curve to the song-data) … rather than the trial and error method I have been using, which takes several iterations.
Thanks

No, there is only the limited “Preview”.

The “Bass and Treble” effect has “real time preview”. https://manual.audacityteam.org/man/bass_and_treble.html

The Equalization effect only has the short preview, though you can change the length of the preview in
“Preferences > PLayback > Effects Preview → Length”. https://manual.audacityteam.org/man/playback_preferences.html

OK thanks… well I usually use Foobar player and mess around with the real-time EQ there and then just transfer the dB values over by eyeballing the Foobar EQ. Last year I remastered a whole bunch of “old rock band” tapes… and I couldn’t figure out why that also took a lot of iterations.
Well, last night I figured out the simple problem while re-doing Jimi Hendrix, Band of Gypsys, Machine Gun (which has terrible EQ ruining both the guitar and vocal… Hendrix had a lot of bad luck with poor techs on his live stuff) … anyway, I finally figured out that you have to double the Foobar EQ dB values and use them in the Audacity EQ and it works perfectly the first time. So a good result for me from our discussions about dB values the other day. I have no idea why Foobar is using the “3dB = x2” relation, but it doesn’t really matter as long as you know what is going on there.
EQ-Foobar-and-EQ-Audacity.jpg

There are several free real-time equalizer plug-ins which work in Audacity on Windows …

Have tried downloading the Voxengo but have a problem getting it to load into Audacity.

Things have changed in 4 years: the way Audacity(3) organizes plugin effects has been overhauled … Using realtime effects - Audacity Support