Among his earlier works, the choral cantata
"Psalms for the Earth" has been awarded the 2008 Composition Prize of the
Brazilian Music Academy (
II Prêmio Cláudio Santoro, 2008); this work already explored higher harmonic limits by employing 19-limit
just-intonation techniques. The electronic work "
Excerpt from Meditation" (2009) continued that path, exploring in 19-limit just-intonation (through an unequal division of the octave in 120 parts). He conducted his own
"Prelude for Orchestra"[https://www.youtube.com/watch?v=4FSDhAPr6UE in 2009. In 2010, Costa's orchestral Work "
In Four Dimensions" was a winner of the Composition Prize of the
Brazilian National Foundation for the Arts (FUNARTE), within the
2011 Biennale of Brazilian Contemporary Music being performed by the
UFF National Symphony Orchestra. He continued to explore microtonality in just-intonation (
"O Cravo Brigou com a Rosa" 2010 but also
31-ED2 (soundtrack to
"Potsdam in Time-Lapse" 2015 [https://www.youtube.com/watch?v=jvcaMksX2oQ), a tuning system that allows for good approximation in higher harmonic limits and
enharmonic modulation. This research ensued in an ongoing collaboration with the
Huygens-Fokker Foundation starting in 2015 at the
Muziekgebow aan t'Ij in Amsterdam with the composition and performance of
"Aphoristic Madrigals" for SATB soli and Fokker-Organ by the ensemble
Vokalprojekt 31, especially formed at this occasion. In 2017 "
...and while there he sighs...." [https://www.youtube.com/watch?v=pSgGgb7y-F8 was commissioned and performed at the same venue, both works again in 2019. In this period Costa also started venturing into harmonic microtonal performance with the use of
isomorphic or generalized keyboards in various tuning systems - such as unequal and
equal divisions of the octave and just-intonation ("
Improvisation" At the same time, he saw audio-design and virtual recordings as a means to realize new microtonal works ("
....and while there he sighs...." adaptive just-intonation, orchestral version: [https://www.youtube.com/watch?v=DzVATHA2iXs video, "
Meditation" in 19-ED2 ) and also to put older musical works (e.g. by
Gesualdo Bach [https://www.youtube.com/watch?v=woveprxo7pY or
Hába into new harmonic perspective, particularly with the use of
19-tone-equal-temperament. Recent developments of this compositional work include the research of
difference tones and
arithmetic frequency sequences ("
Etude on Difference Tones: Minor Thirds" 2022 [https://www.youtube.com/watch?v=U7l7s1Vr6lQ) but also the ability to perform microtonally with the use of the
electronic wind instrument (EWI) (
"Short Piece in 72-ED2", 2022 ) == Collaborative Pianist ==