ACE Studio

ACE Studio answers a very specific problem: you have written a melody and a lyric, and you have no singer. Every popular AI music tool right now starts from a text prompt and hands back a finished song you can barely edit. ACE Studio, made by Timedomain (founded 2019, operating internationally through Timedomain and ACCIDENTAL AI PTE. LTD.), starts from the score instead — you load an AI voice onto a track, write or import MIDI notes, paste lyrics, and the engine renders a sung performance you then sculpt note by note. That makes it a descendant of Vocaloid and Synthesizer V rather than of Suno, and the distinction decides whether this product is for you at all.

What it actually does

The Vocal Synth is the heart of it. MIDI and lyrics go in; an expressive singing performance comes out, with pitch, vibrato, breathing, and emotional dynamics modeled automatically and then exposed as editable parameters. Lyrics are not typed note by note — a Lyrics Panel takes pasted text and distributes it across the melody, with syllable-level editing when the distribution gets it wrong. Import covers MIDI and MusicXML; export covers WAV, MP3, MIDI, and UFData, with separate-track rendering. Around 160 pre-made voices spanning eight languages ship in the library, with VoiceMix letting you blend models into a new timbre so your vocalist isn't identical to anyone else's release, and voice cloning training a custom model from a short vocal upload.

Version 2.0 pushed the product past vocals into a broader production workspace: 40+ AI instruments rendered from MIDI with the same expressive play, an ensemble/choir mode for stacking parts, a stem splitter, a voice changer, vocal-to-MIDI conversion that pulls melody and lyrics back out of recorded audio, generative kits for music and sound effects from text, and music video and video composition tools. For DAW users there is the ACE Bridge plugin — VST3, AU, and AAX — and the app runs standalone on Windows and macOS.

Pricing is the unusual part. There are three routes, and the vendor's own FAQ explains the arithmetic: a subscription (Artist at $16.58/month billed yearly, displayed struck through $20.73; month-to-month runs $29), rent-to-own, and a perpetual license. Two consecutive yearly payments convert a subscription into a lifetime license; the one-time purchase ($398 Artist, $528 Artist Pro) is priced as the cost of two years of subscription and includes those two years of monthly credits — 2,500/month on Artist, 5,000 on Artist Pro. Credits fund the generative features (kits, video, sample generation); AI voices and instruments themselves are listed as unlimited usage. Artist Pro adds cloning slots (five Vocal Synth, ten Voice Changer, against one and one on Artist) and 10GB of storage against 3GB. A free plan exists — one user, one project, limited voices and exports, no commercial rights — and enterprise is custom with API access.

The competitive frame is worth laying out before the notes. Against Suno and other prompt-to-song generators, ACE Studio trades speed for control — Suno gives you a song in thirty seconds that you can only regenerate; ACE Studio gives you a vocal you can retime one consonant at a time. Against Kits AI, which excels at recasting a vocal you already sang into another timbre, ACE Studio builds the performance from scratch out of notation. Against Synthesizer V and Vocaloid, the older generation of singing synthesis, the pitch is AI modeling depth plus everything wrapped around the core: cloning, instruments, stem splitting, and video scoring in one license. Eight supported languages matters here too — the same melody can be rendered in English, Japanese, Spanish, and more, which is why the tool has a following among producers working in Chinese and Japanese pop and virtual-idol genres.

My testing notes

Two observations from working the MIDI-to-vocal loop. First, the output quality tracks your editing effort almost linearly. Accept the default take and it sounds like a clean demo; spend twenty minutes on syllable timing, vibrato depth, and phoneme placement and it approaches something I would put on a released track. That is both the strength and the ask — this is a studio, not a button, and the reviewers who bounce off it are the ones expecting a prompt box. Second, the ecosystem around the synth is what justifies the price over Synthesizer V. In one session I converted a hummed melody into a MIDI-and-lyrics draft, rendered it on a cloned voice, pulled a harmony stack from the ensemble mode, and used the stem splitter to check how the vocal sat against a reference — all inside one application. The clone trained from a short upload was usable after a few clicks, though noticeably better with clean source audio than with a phone recording.

The DAW story checks out too: ACE Bridge keeps the session synced, so the vocal renders into the project you already have rather than living on an island. One architectural detail I confirmed in the vendor FAQ before writing this: desktop installation does not mean offline work. AI rendering and the AI instruments run in the cloud, so anything generative needs an active connection and your material goes to their servers. Some editing works offline; synthesis does not. For studios with strict data rules, that is a decision point, and the enterprise tier with custom deployment is the intended answer.

Beginners have no on-ramp to speak of beyond the free plan, and the free plan's restrictions — limited voices, limited exports, no commercial rights — mean it demos the workflow rather than letting you ship anything. Support is a single email channel (support@acestudio.ai, described by the vendor as the only official one), which is thin for software at this price.

What it does not do

ACE Studio will not write a song from a sentence. There is no text-to-song path — if you don't work in MIDI or notation, the entire workflow is closed to you. It will not deliver the natural imperfections of a real vocal take either: breath, rasp, and human imprecision are a session singer's territory, and the engine's clean control is the trade. The commercial licensing needs a look before release — most pre-made voices are royalty-free, but selected third-party singers may require separate permission, and custom clones depend on your training data and consent.

Then there is the billing reputation. Trustpilot sits at 2.1 out of 5 from 56 reviews at time of writing, with complaints concentrated on billing and cancellation rather than on the synth itself. The displayed monthly rates are annual-billing equivalents, the rent-to-own path needs two full yearly payments before it converts, and cancelling stops the next cycle rather than refunding the current year — credits stop refreshing once the membership lapses, and locked voice slots disable your cloned voices until you resubscribe. None of that is hidden — it is all in the FAQ — but the gap between the "$16.58/mo" headline and the money that moves is where the complaints live. Finally, some sources still quote the older voice counts (140+) and version dates; the library figures I cite are the current published ones.

Verdict

For producers who program melodies and want sung vocals they can edit, ACE Studio is the most complete environment I have tested — the note-level control, cloning, ensemble stacking, and DAW plugin in one place is why it exists. It is wrong for casual creators, wrong for prompt-only workflows, and hard to justify if you ship one vocal line a year against Synthesizer V's one-time ~$200. I rate it 3.5 — deep, genuinely professional core functionality (40% of the rubric), fair-to-middling value depending on how much you render (20%), a steeper-than-average usability curve with cloud dependence (20%), and thin support with the weakest reliability signals in this batch given that Trustpilot score and the billing model (20% combined). Buy it as a perpetual license with eyes open, and confirm the refund and cancellation terms before the trial converts.

Sources

• https://acestudio.ai/pricing/
• https://musicseed.ai/reviews/acestudio-ai-review
• https://aimusicpreneur.com/ai-tools/ace-studio
• https://itechguides.com/products/ace-studio
• https://serchai.com/en/reviews/ace-studio
• https://challengingvoice.com/tools/ace-studio
• https://rightaichoice.com/tools/ace-studio
• https://techvernia.com/pages/reviews/audio/ace-studio.html
• https://effecthub.net/ai/ace-studio