Compressors in presets are set to react to a specific volume level. If your vocal was recorded too quietly, the compressor won't do anything. If it was recorded too loudly, the compressor will destroy your dynamics. Use Studio One's tool on the audio event to turn your vocal up or down until it hits the compressor correctly. 2. The De-Esser Threshold
Studio One is a popular digital audio workstation (DAW) known for its user-friendly interface and powerful features. Vocal presets can help you: studio one vocal presets free