If the band contains keyboard percussion such as xylophones or glockenspiels, tune the entire band to that pitch.
Both instruments have the opposite effect to wind instruments; the higher the temperature, the lower the pitch, and the lower the pitch, the higher the pitch.
Tune the timpani every time. Once, when I went to a school during summer vacation, I was asked to tune the timpani for the autumn concert, but I don't think it's possible to use them at the autumn concert while they're tuned in the summer.
Not only hand-tuned timpani, but pedal-operated timpani also require tuning by listening carefully.
The indicators on pedal-operated and handle-operated timpani are set as a guide for each note after tuning the lowest note of the instrument, and they do not automatically tune the note by tuning the indicator. Before practicing or playing, first tune the lowest note with the pedal or handle, and then align the needle of the indicator with the note name plate to prepare it.
The tone of the snare drum and bass drum changes depending on the tuning. The tone of the bass drum in particular has a big impact on the tone of the entire band. Listen carefully to the sound of the same instruments in a good band or orchestra, and try different tunings until you find a tone you like.
If the head gets old, no matter how much you tune it, it will not produce the tone you want. Please tune it while checking the condition of the head.