Males with female voices

@clairP  Can I confirm that you have been playing sims previously and the voices were different, and that you're noticing it with all male sims?

Let's begin troubleshooting by eliminating a few things. Below are directions for if you do or do not have Mods/CC. Please follow directions for which steps apply in your case: 

Do you have Mods or CC (or have you ever had them)? If you do please remove them in this process and try the troubleshooting as described below. (If you don't have Mods or CC, just skip the part about removing the Mods folder, but still delete the cache files mentioned and run the repair.) If you ever had Mods or CC in the past then do the steps as if you have them currently (removing the Mods folder), as there could be damage that has remained after you removed them.

• Exit your game then exit Origin. Please drag the Mods folder from your 'The Sims 4' folder onto your desktop (for future reference) then delete the localthumbnailcache.package file in your 'The Sims 4' folder. Also delete any other folders in the 'Sims 4' folder with word cache in the name. (When you restart the game it will automatically create a new Mods folder.)
• Next please run a game repair [ Open Origin, click 'Game Library' then right-click Sims 4 > Repair Game ]. Make sure to let it run until it has completed all repairs (it will do the base-game first, then run through each of your expansions/packs).

Do not re-add any or your Mods or CC at this time.

Please restart your game and do not enter your previous game-save but begin a new game. See if the issue is present in this new game-save. If the issue is not present in the male sims in the new game-save, you can then check the sims in your current game save and see if their voices are now behaving normally.

If it was Mods/CC: If this fixes the issue I would recommend that you check with the Mod and CC creators to see if there are any known issues with their Mod/CC clashing with the recent update and if so do they have an updated Mod/CC that will address the changes in the game's code from the update. You can then re-add your updated Mods/CC one at a time to see if one was conflicting with the function/causing the glitch - but do not re-add the old config file from the old mods folder, as it is possible for it to have become corrupted also.