I recently purchased a batch of MelODee player piano rolls, each one
has four tunes. There is no Tempo marked on the rolls; am I just
supposed to use trial and error to set my piano to the proper tempo?

Is there a [standard] set tempo for all rolls, and the same for each
of the four tunes?

Fredric Martin

 [ MMD articles about the 1920s MelODee and Mel-O-Dee brands are at
 [ https://www.mmdigest.com/Gallery/MMMedia/brands.html 
 [ https://www.mmdigest.com/Archives/KWIC/M/melodee.html 
 [ https://www.mmdigest.com/Archives/KWIC/M/mel-o-dee.html 
 [ -- Robbie