Personal samples are optional. You can train with TTS only, or upload your own audio here and it will be saved into personal_samples/ as 16 kHz mono 16-bit PCM WAV.
WAV, MP3, M4A, FLAC, OGG, AAC, OPUS, and WEBM are all fine when ffmpeg is available. Files already in the correct format are kept as-is.
personal_samples/.