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Voice cloning from a Mac with no NVIDIA card: IndexTTS 2.5 on a Colab L4, near real time

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Breakdown2 min readLast edited October 13, 2026

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nicekate runs the open-source voice cloner IndexTTS 2.5 on a Colab L4 GPU, driven from her Mac: 34.69 seconds of narration takes about 35 seconds to synthesize, close to real time. Her 6.5-minute video covers setup, reference audio, settings and compute units: the recipe if you have no NVIDIA card and want narration in your own voice.

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