Describe what you hear
Specific observations are more actionable than saying a mix sounds bad or good. Identify the element, moment and listening condition.
Instead of “the vocal is muddy,” say that the words become hard to understand when the bass and low-mid instruments enter the hook.
Separate preference from technical issues
Taste is subjective, while clipping, noise, missing files and unclear lyrics can be checked more directly. Make clear which type of feedback you are giving.
Explain whether a suggestion is a personal preference or a problem that affects intelligibility or playback.
Prioritise the biggest change
A long list of tiny comments can overwhelm the mixer. Focus first on the changes that improve the song as a whole.
Send three ranked notes with timestamps, then leave minor optional ideas for a later pass.
Reference the intended outcome
Feedback should relate to the artist’s goal and the reference tracks, not simply force the mix toward your personal style.
Mention the reference song and the particular quality you mean, such as vocal distance, low-end weight or overall brightness.