How did Old Prussian stress and intonation compare with Lithuanian and Latvian?

Regarding stress and intonation in the Baltic languages, Old Prussian differed from Latvian and shared similarities with Lithuanian in its placement of word stress, while its intonation patterns were more closely aligned with the archaic features of Latvian.1

• Word Stress: Old Prussian utilized free word stress, which is also a characteristic of Lithuanian. This stands in contrast to Latvian, where word stress is fixed and predictably falls on the first syllable.12
• Intonation: Old Prussian employed intonations (tones) that are considered more archaic than those found in Lithuanian, bearing a character similar to those in Latvian. Specifically, the Proto-Baltic circumflex intonation corresponds to the falling tone in Old Prussian, while the Proto-Baltic acute intonation corresponds to the rising tone.1

In summary, while Old Prussian's free stress system mirrored that of Lithuanian, its tonal system retained an archaic quality comparable to that of Latvian.1