![]() Results showed that experimental and control groups obtained similar results. The study included a perception pretest, a pronunciation instruction class, taught only to the experimental group, and a perception posttest. The participants of the present study were 17 Brazilian speakers of Portuguese as L1, beginning learners of English, divided into experimental and control groups. However, some of these investigations did not focus on the role of instruction to such discrimination. Previous studies indicate that a single L1 category seems to be a source of difficulty to L2 vowel discrimination. There have been a few L2 pieces of research that focused on the instruction of specific vowel contrasts. Since version 3.12.This article aims to analyze whether formal instruction influences Brazilian speakers' perception of the English high back vowels contrast. ![]() The comparable Audacity has even more options, making Ocenaudio easier to use, especially for the novice user. There is also a spectrum analyzer and the program uses memory very efficiently. Opening and saving files happens in the background, so that the program remains available. ![]() It has extensive possibilities, such as support for vst plugins and performing an operation in several places in a file at the same time. This free sound editing program is from Brazilian origin and has versions for Windows, Linux and macOS. Version 3.12.5 of Ocenaudio has been released.
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