Notre Dame High's concert band won its section of the prestigious event in Greenock Town Hall last week.
Emma and 40 other pupils - including her little brother Mark - wowed the judges with their fine performances of the theme music from The Incredibles and a second piece, Kinesis, by Michael Sweeney.
Emma played a saxophone solo and Mark, 13, played percussion.
The trophy for the top concert band was donated to the festival in 2002 in memory of Emma and Mark's uncle, Robert Burrows.
Emma said: "My aunt was a music teacher and worked in schools in Inverclyde, so she always had pupils in the festival.
"My uncle always went to the concert band classes at the festival because she was there and he always complained there wasn't a trophy for the best concert band because it was his favourite class."
After Robert passed away, his relatives donated a trophy to the festival in his name.
When Notre Dame won the contest, conductor Gerard Gordon, principal of the music department, chose Emma to collect the trophy on behalf of the band.
She went forward with fellow bandmate Lorna Begley who collected the certificate.
Emma, who is planning a career in law, said: "My mum was there and my granny and they were really pleased because it was the first time we had won the trophy."
Mr Gordon was delighted with the performance given by his pupils.
He said: "The concert band won and the school's orchestra also won on the Friday evening.
"I am incredibly proud of all the students.
"It is a difficult time for them because they have their prelims but they worked so hard and their performances were fantastic."
Class 246, Brass solo, 18 and under: 1, Eve Morrow, Port Glasgow (87); 2 equal, Geraldine McDermott, Port Glasgow; Ruaridh Langan, Port Glasgow (86).
Class 247A, Brass solo, 18 and under: 1, Rachel Petrie, Greenock (88); 2, Michael Hepburn, Port Glasgow (87).
Class 245, Brass solo, primary: 1, Kieran Henderson, Port Glasgow (87); 2 equal, Sarah McKenna, Gourock; Eve Bonnar, Greenock (86).
Class 256 (EIS Trophy), Brass ensembles, primary: 1, St Ninian's Brass Ensemble, Gourock (87); 2, All Saints Primary, Greenock (86).
Class 252, Brass duet, 13 and under: Iona McNair, Kelle Murphy, Kilmacolm (85).
Class 253, Brass duet, 15 and under: Anita Percival, Flora McCartney, Greenock (86).
Class 254, Brass duet, 18 and under: Natalie Jenkins, Alison Marshall, Port Glasgow (88).
Class 248A (Willie O'Neil Memorial Cup), Brass solo, 18 and under: Through to the final - Francesca Dempsey, Gourock; David McCready, Port Glasgow.
Class 247B, Brass solo, 18 and under: 1, Nicholas MacDonald, Greenock (88); 2, Bethany Huddleston, Greenock (87).
Class 248B (Willie O'Neil Memorial Cup), Brass solo, 18 and under: Through to the final - Ashleigh MacLachlan, Greenock; Meagan McDonald, Kilmacolm .
Class 248F, Final, Willie O'Neill Memorial Cup: Meagan McDonald, Kilmacolm (89).
Class 257 (Scottish Co-op Inverclyde and Renfrew Shield), Brass ensembles, schools 15 and under: Notre Dame HS Brass Ensemble, Greenock (87).
Class 258, Brass ensembles, schools 18 and under: 1, St Stephen's HS Brass Ensemble, Port Glasgow (89); 2, Clydeview Academy, Greenock (87).
Class 14 (Jean Turnbull McCamley Trophy), Vocal solo, boys 18 and under: 1, Calum MacDonald, Houston (88); 2 equal. Luca Hlaing, Greenock; Michael McDiarmid, Gourock (87).
Class 15 (Isabel McConnell Trophy), Vocal solo, girls 18 and under: Rachel Hanlon, Greenock (86).
Class 16, Vocal solo, 18 and under: 1, Hannah Tallis, Wemyss Bay (87); 2 equal, Roisin Murray, Greenock; Robbie Leith, Greenock (86).
Class 25 (1st District Council Trophy), Vocal solo, Scots songs, girls 18 and under: 1, Caitlin Findlay, Bridge of Weir (87); 2, Melissa Meighan, Brookfield (86).