In one fairly cited study by E. Glenn Schellenberg (~800 citations in Google Scholar) we find that
Compared with children in the control groups, children in the music groups exhibited greater increases in full-scale IQ. The effect was relatively small, but it generalized across IQ subtests, index scores, and a standardized measure of academic achievement.
The exact effect size computed by the authors was 0.35, and the raw increase in IQ score is summarized in the authors’ graph below:
So, has this finding (music education effect on IQ) survived replication in other studies?