In my limited experience (10+ years) with bass, the spawn usually takes somewhat longer than 1 day. Having said that, I'll qualify it. Bass as I understand it will have a male make a bed, then he'll coherse(sp?) a female over it and breed with her. He'll arouse her for 1/2 to 5 or 6 hours. If he's successful she'll drop 1/8 to 1/2 of her eggs in his nest over 4 hours to 2 days. Then she'll vacate for a while (hours to days) to rest in deeper water(2-3X as deep as she spawned). At this time she won't be easily caught but he's eager to smack anything in the area. Then she'll move back up and let him or another male do it again. If at any time during the mating the weather goes bad she'll disapear and won't be back until it's nice again. If she gets seriously scared off the bed (hooked, caught, etc.), she'll usually abandon the area. If she's stressfully caught but not truly hurt she may abandon the spawn and reabsorb her eggs, not spawning that year. This is why I have advocated either not fishing for spawners or only throwing to ones that will break your personal all time best and doing it with tackle that will allow a fast landing and a fast release.
Also keep in mind that not all bass are spawning at the same time varying up to almost a month and 2 or 3 degrees F.
I have to go, sorry.

Tight lines,
Wade

Tight lines,
Wade