Related for Rosh Hashanah 3:5
שָׁוֶה הַיּוֹבֵל לְרֹאשׁ הַשָּׁנָה לַתְּקִיעָה וְלַבְּרָכוֹת. רַבִּי יְהוּדָה אוֹמֵר, בְּרֹאשׁ הַשָּׁנָה תּוֹקְעִין בְּשֶׁל זְכָרִים, וּבַיּוֹבְלוֹת בְּשֶׁל יְעֵלִים:
The Jubilee year is similar to Rosh Hashanah in respect to blowing [straight shofroth. And even though blowing on the Jubilee is neither for prayer nor for remembrance, but to signal the emancipation of bondsmen and the reversion of fields to their (original) owners, still, it (the blowing) must be like that of Rosh Hashanah, this being derived by identity: "seventh"-'seventh," that all the blowings of the seventh month be alike. Another interpretation: "in respect to blowing" — in respect to the number of the (shofar) blowings], and in respect to blessings, [malchiyoth, zichronoth, and shofroth (4:5) being recited on Yom Kippur of the Jubilee as they are on Rosh Hashanah.] R. Yehudah says: On Rosh Hashanah we blow with (shofroth) of rams, and, on Jubilee, of ye'elim. [The halachah is neither in accordance with R. Yehudah nor with the first tanna; but the halachah is that both on Rosh Hashanah and on the Yom Kippur of the Jubilee, we blow with the bent shofroth of rams.]