Likely. Or at least "it is some improvement, hopefully, if calibrated carefully". Whether the lower bits in this computation mean anything is really anybodies guess. The audio circuit hasn't been constructed with this in mind, thus... If you want high-quality audio, I would suggest a real audio card, or compute as 16-bit wav, burn on CD and play with your CD player. Turnaround-times are of course rather extreme if the last option is used. (-:
It's actually very impressive when calibrated correctly. Have to use double scan screen modes though to get 44.1KHz or 48KHz playback, just as you would with normal Paula audio (for those who don't know).