At some point in late 1944 or early 1945, Curly Howard suffered the first of what was to be a long series of strokes. Due to this, his ability to function and to perform varied widely from day to day and week to week. Always-protective brother Moe insisted he check into a hospital, where the younger Howard was diagnosed with acute hypertension, obesity, and eye problems. He had also been a heavy drinker for years. The doctors (and Moe) insisted that Curly rest; as a result, the Stooges cut back production in 1945. Over the next two years, Howard's abilities varied greatly; the comedian often appeared sluggish, and many scenes had to be shot repeatedly. Nonetheless he made 16 more shorts in the interim, until a massive stroke on the set of "Half Wits Holiday" ended his career in early 1947.
Fortunately for Stooges fans, Curly was near the top of his game for "Micro Phonies," because it is one of the best that the trio made. With new director Edward Bernds at the helm, the film is put together well, with a good mixture of slapstick, music, and dialogue.
Observant viewers will notice that Curly is lip-syncing most of the actual words to "Voices of Spring" (which was actually sung by Christine McIntyre). The Italian aerie that Gino Carrado is trying to sing as the boys throw cherries into his mouth is "Vieni Sul Mar." And during excerpt from the recording of the Sextet from Lucia, while there is considerable clowning around,, you can actually see Larry and Curly lip-syncing many of the correct words of the their parts of the aria --- in Italian! This isn't surprising to Stooges fans, as all three were known to be perfectionists who took their craft, slapstick or not, seriously.
It should also be known that Moe was a good bass-baritone singer who was in casual quartets. Larry was a studied violinist and pianist, but he wasn't known as a singer.
Overall, "Micro Phonies" is one of the better Stooges works, and it deserves a look if you find it on TV or the internet.