Hi everyone, it's a bit late to be new here but if anyone could be kind enough to look over my commentary (and give it some kind of grade), that'd be wonderful!
Edited after writing it under timed conditions. Text attached (it's from Engage, has occasionally painful spelling)
Thanks

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Text 3 is a transcript of a conversation between American teenage producer Porter Robinson and Melburnian television presenter Marty. It is a highly informal interview that primarily serves a referential function to inform Australian teenage music fans about Porter’s career and inspiration. Its secondary purpose is to promote Porter as a musician and enhance his image. Porter is the dominant speaker in the conversation as he is the interviewee.
The prosodic features within the text are typical of a spontaneous television interview. Porter’s speech is replete with non-fluency features, including pause fillers like “umm” (16, 51), false starts, “it was- I’ve never” (50), and repetition, “It’s-it’s” (58). These features indicate the unscripted nature of Porter’s speech and allow him the opportunity to construct his thoughts and self-correct. Nonetheless, his speech has some elements of a scripted response, likely a result of his desire to promote himself as professional musician by delivering confident and fluent pre-prepared responses. This is illustrated in his articulation of his gratefulness towards his fans in “I’ve never been...tastes” (50-53), which lacks the frequency of non-fluency features present in the rest of his speech. Marty’s speech displays features of preparation as well, in alignment with his role as a television presenter expected to open, close, and direct the conversation. His formulaic closing “This has...Channel V/” (105) includes reduced pace when articulating “<L Porter Robinson L>”, in keeping with the convention of dramatic emphasis on the interviewee’s name during the closing sequence of radio or television interviews. Marty also employs numerous utterance-final rising intonations to indicate interrogatives, “Did you...video?” (23-24), as well as High Rising Terminals, as in “...Channel V/” (105), in order to invite Porter to take the floor and respond, fulfilling his role as the host.
The conversational strategies employed in the text are indicative of the roles and relationship in the conversation. As the subject of the interview, Porter is the dominant speaker, and Marty supports this allocation of roles by employing backchannelling minimal responses, such as “[yeah]” (27, 35) and [yep]” (42). This encourages Porter to speak more by enhancing his positive face needs as he is being attentively listened to by Marty. The interviewer-interviewee relationship is also supported by the high consideration conversational style maintained through the text. There are no interruptive or competitive overlaps as Marty waits for Porter to indicate he has ended his response with final intonations such as “...I really liked it.” (43) and “...thrilled by it.” (65). Marty then takes and returns the floor by initiating question-answer adjacency pairs, as in “did you...reception/” (44-49), allowing Porter to continue speaking by completing them. Adjacency pairs allow Marty to steer the conversation too by introducing topic changes in his initiating utterance, such as “Is there...moment?” (67-69), both supporting his role as a host and the referential function of the discourse by providing viewers with more information about Porter.
The social purposes of the text are served by the stylistic features and register of the interview as well. Syntactically, the use of declaratives, like “I did one last March” (15) and “I didn’t expect...it” (65), allows for efficient delivery of information to the audience about Porter’s opinions. The active voice, as in “...my age...gave me...advantages” (70-71) is used consistently to make Porter’s speech more direct and accessible to the viewers, supporting the informative purpose of the text as well. Porter employs the informal discourse particle “like” throughout the text, both as a hedging device, “I did like a small...tour” (12), and as an indicator of reported speech “I...was like” (103). Not only does it maintain the informal register, it also indexes his identity as a teenager, as it is a lexeme used most typically by teenagers in everyday discourse. This serves the secondary function of the text to enhance his image with the teenage audience by emphasising the shared social identity between him and them, making him seem more relatable. Reinforcing this notion is his use of the inclusive third-person personal pronoun “we” (77) to encompass himself within the same group as “high school kids” (76), his intended audience and fanbase. Alongside his reference to popular social networking website "Instagram" (38), Porter’s lexicology increases his social currency with prospective fans. By enhancing his image as such, he can ultimately enlarge his fanbase and thus increase his popularity and income as well.