First, I need to identify all the words that can be substituted. Let's go through each sentence carefully.
"and remove background noise." Replace "remove" with eliminate and "background noise" with unwanted noise. First, I need to identify all the words
"Memory: 4 GB RAM or more" → System Memory: Minimum of 4 GB RAM or additional. "Memory: 4 GB RAM or more" → System
Second sentence: "OBS Studio: A free and open-source screen recording software." Proper noun is "OBS Studio", so leave that. Replace "free" with unpaid. "open-source" could be open-source. "screen recording" same as before. "software" same as before. "open-source" could be open-source
Wait, but the user wants every word except proper nouns replaced with three alternatives. So each word (excluding proper nouns) should have three choices. Let me go step by step.
I also need to make sure not to change any brand names. So words like "TechSmith", "Adobe Captivate", and "ScreenFlow" should remain as is. Then, for each sentence, systematically replace words with alternatives. Words like "robust" could be powerful, "e-learning" might be instructional authoring tool.