Reading along with the Ba’al Koreh

The oleh must read along with the ba’al koreh during his aliyah. If one did not read along, his beracha was a beracha l’vatala.(105) Based on the writing of the Zohar, only the ba’al koreh should read and not the oleh.(106) Some say the Zohar only refers to reading out loud and therefore the oleh should read along quietly with the shatz.(107) However, this is not the custom, and one may read even if he hears the words he is saying.(108) Nevertheless, one should not say the words so loud that the ba’al koreh will become confused during his laining.(109) Many people are not careful with this which is incorrect. Many question why we do not say shomeha k’oneh in this situation, since the ba’al koreh is reading the oleh should not have to read. (110)

If the Ba’al Koreh has a Different Pronunciation

Many times it happens that one gets an aliyah (or davens) in a place where the ba’al koreh has a different havarah. The question arises whether one is yotzei laining. The opinion of most poskim is that one is yotzei.(111) The Chazzon Ish took issue with an Ashkenazi being yotzei with a Sefardik ba’al koreh.(112) The Brisker Rav was always careful to listen to laining from a person who had the same pronunciation as he did. (113)

Footnotes
(105) Tur 141, Bais Yosef, Mishnah Berurah 10, Rivevos Ephraim 4:77:23, Avnei Yushfei 1:131:2, Refer to Yalkut Yosef 141:pages 115-117 in depth. (106) Bais Yosef, Chai Adom 31:5, Kaf Ha’chaim 16,18. The Shulchan Hatohar 139:1 says it is forbidden for the oleh to say anything while the shatz is laining. (107) Darchei Moshe 2, Drisha 1, Shulchan Aruch 141:2. (108) Rama 141:2, Levush 2, Magen Avraham 4, Be’er heitiv 3, Mishnah Berurah 13, Aruch Ha’shulchan 4, see Shar Ha’tzyion 12. Biur Halacha “l’vatala.” (109) Sharei Ephraim 4:8. (110) Refer to Taz 3, Mamer Mordechai 141:3, Halichos Olom 3:pages 130-133 in depth, see Sheilas Yaavetz 1:75 why it is not possible to say shomeha k’oneh here. Refer to Likras Shabbos 2:pages 131-132, Rivevos Ephraim 6:215:41. (111) Refer to Yosef Ometz 20:2, Teshuvos V’hanhugos 1:128, 1:154, Moadim V’zemanim 2:170:footnote 16, Rivevos Ephraim 7:360, Yechaveh Da’as 4:3, 6:19:page 109, Yaskil Avdi 8:6:1, Halichos Olom 3:page 133, Minchas Yitzchok 4:47:1, Oz Nedberu 3:page 156, Bunim Chavivim page 257 quoting the opinion of Horav Chaim Kanievesky Shlita, See Bunim Chavivim pages 333-334. Some say this applies even to parsahs zochar (Bumim Chavivim page 340). (112) Refer to Chazzon Ish O.C. Hilchos Tefillin 9:6, Orchos Rabbeinu 1:page 70:24. (113) Teshuvos V’hanhugos 1:154.