Isaac Howlett is a British-born musician now living in Linz, Austria. He's best known as the singer/songwriter behind internationally renowned synth-pop band Empathy Test.

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After successful collaborations with Bop x Subwave on Storm in a Teacup and Aesthetic Perfection on Save Myself, Isaac released his first solo single, House of Cards, in February 2024. It reached #1 on the German Alternative Chart (DAC) and #2 in the best-selling synth-pop tracks on BandCamp, with ReGen Magazine praising its "energetic, emotive layers of synth".

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Isaac Howlett's second solo single, Endless Night, arrived later that year, scoring Isaac another DAC #1. US-based Synthpop Fanatic included it in their 10 Best Synthpop Songs of December 2024 and the UK's Blitzed Magazine described it as "an ethereal gem".

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In April 2025, Isaac made his solo live debut with three shows in Germany. In Berlin, Reflections of Darkness wrote that Isaac's "emotionally charged synth-pop ballads immediately captivated the audience". In Oberhausen, Monkey Press commented that Isaac's "intense" set left behind "a palpable sense of anticipation".

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In July 2025, Isaac released another collaboration, this time with A State of Flux. Spiralling debuted at #6 in the DAC and reached #23 (Czech Republic), #26 (Sweden) and #38 (Germany) in the iTunes Alternative Chart. At the end of the year, Synthpop Fanatic crowned the track their #1 synth-pop song of 2025, while Synth Heaven placed it at #11.​

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In October 2025, Isaac released third solo single, Eggshell, which debuted at #1 on the DAC. It also reached #13 (Germany), #15 (Sweden) and #31 (Spain) in the iTunes Alternative Chart. Ghosts of the Tsunami entered the DAC three weeks later, giving him two simultaneous top 20 tracks. Ghosts... later also reached #1.

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Isaac began 2026 by touring Germany as main support for Covenant and Spain with Devision Redux. He will shortly release a two further singles, Something Changed and A Year Without Light.