As a student trombonist, I was taught to listen and adjust the tuning of every note I play. I've been doing this for over 40 years now. I'm not perfect, but I do listen. I recently noticed that when tuning the band, conductors often use electronic tuners, and tune people individually. Unfortunately, this reliance on technology, I believe, is leading to players not properly listening to one and other, with the consequent deterioration in intonation and general musicianship. We need to make the distinction between tuning and Intonation: Tuning means having the instrument set up so that (all other things being equal), the notes produced are of the correct pitch. Intonation is the fine tuning of each note in relation to the other players in the band. This is achieved by adjusting for environmental factors not related to the actual tuning of the instrument per se. For example, tired lips, temperature etc. So, my point is.... Please be aware of the difference between instrument tuning and Intonation. Don't overly rely on electronic tuners. Just listen and adjust. You may find the experience a satisfying one. I wonder if anybody else has any comments or observations on this, particularly in relation to brass band playing these days ?