How to use it
Make the command earn its place.
Use the style or production brief to describe this sound. Specify the instrument, voice or texture it should affect; a bracketed label is not a guaranteed control. Keep a small set of compatible directions and separate them from the words to be sung.
Intended effect
Aim for a rounded attack and a softer accompaniment around the vocal.
Limitations
Nylon strings do not automatically imply flamenco or classical playing. Name those techniques only when they are intended.
A useful comparison
Compare nylon-string and steel-string descriptions using the same arpeggio and arrangement.
If removing the tag would not change the intended energy, voice, texture or arrangement, it is probably not adding useful direction.
Examples describe a musical intention. They are not guarantees that a generator will follow every cue. Keep your lyrics and settings fixed, change one direction at a time, and save the prompt, model/version and result you compare.
Editorial review: 5 September 2026. No model-specific generation test is claimed for these examples.
For the input format, see Suno’s guidance on style and lyrics and Udio’s guidance tags. Supported controls differ between products and versions.