Though this movie was made a considerably long time ago, I wanted to try to find something with an actor or director speaking about the movie. Upon searching, I found the following interview with Director Stanley Donen. https://www.youtube.com/watch?v=hC4LbzOO0ss

Singing in the Rain now is looked back on as one of the greatest movie musicals ever made, however at the time of it’s release this was not the case. In the more recent years, many interviews have been conducted with actors such as Debbie Reynolds, as the film is now a piece of film-making history. The video attached above contains and interview with the director Stanley Donen discussing the process of what it was like to make the film and the scenes that were the most difficult. In short, the thing that he said he struggled with the most was simply filming the actors in synchronization. He specifically pointed out the scene where tongue twisters are sang about. Donen also discusses the most famous scene in which Gene Kelly dances and sings in the rain. He describes the ways in which they had to control even the smallest details; most notably digging up the concrete in the ground to regulate the size of the splashes Gene Kelly made as he danced around. Another fascinating aspect of the video was also how they discussed the factors of filming of which they could not control, like the water pressure of LA and the blistering heat. Though short, the clip provides insight into the difficulties in creating a film as memorable as this one.
However, while viewing the film I was considering the ways in which diegetic sound and non-diegetic sound played a role. I found this short film essay/film study, on youtube, highlighting different scenes and discussing their use of sound.

The picture shown above from the scene where Cosmo Brown performs his musical number. I found this the most interesting because while swept away by the number upon viewing, I did not realize the usage of sound effects to better amplify the comedic tone, as this video highlights. It also examines other uses of diegetic and diegetic sound that are useful when understanding sound in Singin’ in the Rain. Unfortunately in the interview with Stanley Donen, he did not discuss his usage of sound or choices behind when to use what effects. In this film, the smaller sounds are what is furthering a viewers experience of the film. Obviously each character does not hear every aspect of the song we are hearing, typically they would only hear their own voice. However as viewers, it is easy to forget what is heard by all both in and out of the film and this analysis reminds us of that.