It’s completely off-topic but Compose is amazing. Specially as you can actually customise it for your usage, with a .XCompose file. For me it’s the only think that makes phonetic transcription flow, otherwise you got to shift layouts back and forth to write something like “[tɾɐ̃skɾi’sɜ̃ʊ̯] ⟨transcrição⟩”.

Here’s mine, if anyone is interested.