LyricToMelody AI vs SoulX-Singer

LyricToMelody AI turns lyrics or other musical ideas into melody drafts, AI vocal demos, and editable MIDI. Users can provide a verse, chorus, hook, or full lyric sheet and label sections such as verses, choruses, and bridges. Melody ideas are shaped around syllables, pacing, and song structure. Listed exports include MIDI, WAV, and MP3; Starter also includes PCM. The service describes its MIDI and audio workflows as working with Ableton Live, FL Studio, Logic Pro, Cubase, Studio One, and other DAWs. Other listed tools include MIDI-to-vocals, text-to-MIDI, multi-track generation, and vocal removal. Starter is free and provides 20 starting credits with seven-day project retention. Creator costs $10 a month billed annually, or $120 a year, and includes 1,200 monthly refreshed credits, MIDI and audio export, commercial rights, and 30-day retention. Studio costs $30 a month billed annually, or $360 a year, with 3,600 refreshed credits and one-year retention. Files may be stored during processing and the retention period; projects and files can be deleted from the dashboard.

SoulX-Singer is a singing voice synthesis model that generates voices for singers it has not been tuned on. Pitch, rhythm, and expression can be guided by melody-conditioned F0 contours or score-conditioned MIDI notes. Its voice-conversion system changes raw singing audio to a target singer’s voice while retaining melody, rhythm, and lyrics, without requiring lyric or MIDI transcriptions. It supports Mandarin Chinese, English, and Cantonese, plus singer-timbre cloning, cross-lingual synthesis, and lyric editing while retaining natural prosody. Preprocessing tools handle vocal separation, dereverberation, F0 extraction, voice activity detection, and lyric and note transcription. Users can edit MIDI metadata, including lyrics, phoneme alignment, pitches, and durations, before synthesis. Soul-AILab provides generation and conversion demos and a separate MIDI editor through Hugging Face Spaces; the repository also supports local inference. Code and model weights use the Apache 2.0 license. Maintainers caution that automatic preprocessing may misalign singing with lyrics and notes, so manual correction may be needed.