FX (track)
by Black Sabbath
FX appears on the following album(s) by Black Sabbath:
- Vol 4 (track #4) (this album) (1972)
- Black Box: The Complete Original Black Sabbath (1970-1978) (track #28) (compilation) (2004)
- The Ten Year War (track #27) (compilation) (2017)
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FX ratings
Average Rating = (n ÷ (n + m)) × av + (m ÷ (n + m)) × AVwhere:
av = trimmed mean average rating an item has currently received.
n = number of ratings an item has currently received.
m = minimum number of ratings required for an item to appear in a 'top-rated' chart (currently 10).
AV = the site mean average rating.
Showing latest 5 ratings for this track. | Show all 113 ratings for this track.
| Rating | Date updated | Member | Track ratings | Avg. track rating |
|---|---|---|---|---|
| ! | 06/15/2026 18:01 |  DommeDamian | 75,123 | 51/100 |
| ! | 04/23/2026 09:42 | Pavloss | 2,378 | 60/100 |
| ! | 01/23/2026 03:12 | stareaterogni0n | 5,751 | 70/100 |
| ! | 01/22/2026 11:26 | kinginsomniac12 | 6,024 | 100/100 |
| ! | 01/07/2026 23:00 | wizardalien | 9,756 | 61/100 |
Rating metrics:
Outliers can be removed when calculating a mean average to dampen the effects of ratings outside the normal distribution. This figure is provided as the trimmed mean. A high standard deviation can be legitimate, but can sometimes indicate 'gaming' is occurring. Consider a simplified example* of an item receiving ratings of 100, 50, & 0. The mean average rating would be 50. However, ratings of 55, 50 & 45 could also result in the same average. The second average might be more trusted because there is more consensus around a particular rating (a lower deviation).
(*In practice, some tracks can have several thousand ratings)
This track has a Bayesian average rating of 63.1/100, a mean average of 61.9/100, and a trimmed mean (excluding outliers) of 61.9/100. The standard deviation for this track is 22.3.
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