Yes. An M4A uploads directly and trains an RVC .pth model - no conversion step on your side. M4A is the format an iPhone Voice Memo, a WhatsApp voice note, and most phone recorders produce, which makes it the most common real starting point for a voice dataset.
M4A is a container holding AAC audio. AAC is lossy, but at the bitrates phones record at it holds voice detail well - usually better than an MP3 of the same size. You do not need to export it to WAV first.
Active trainings
Selected job
Training details
Working
Model—
Training strength—
Elapsed time—
Stage 1 of 6Receiving audio
Epoch 0 of 2000%
Epoch progress comes directly from the running RVC trainer.
The audio you sent
PTH
Latest training checkpoint
An inference-ready early model is available while training continues.
Create a free account and your first voice training is free. It also comes with three free voice conversions, each up to 5 minutes long. Each separator, noise remover and reverb remover includes 10 free minutes, one time. No account needed. Vocal Enhancer is part of a subscription.
Checking eligibility...Taster pack
$5 training balance
$4.99$4.99non-expiring
One-time, not a subscription. At current quotes, $5 covers up to 11 one-minute tests at 100 epochs, 4 five-minute runs at 180 epochs, or 2 ten-minute runs at 180 epochs. The exact cost and balance left are shown before training.
Starter pack
$10 training balance
$8.99$8.99non-expiring
Pay different amounts for short tests and longer, stronger training.
Best value
$27.50 training balance
$24.99$24.99includes $2.51 extra
Best for creators training several voices or comparing epoch settings.
Monthly conversion plans
More voice conversions
Use the included free minutes first. Subscribe only when you need more voice conversions; monthly plans also include renewable training credit.
Subscriptions
Cancel any time
For everyday projects
NiceVois Lite
Unlimited audio tools, with a smaller training and conversion allowance.
Every tool, unlimited, with separate-file batch processing. Train multiple voices at once.
One-time training
Pay once. No subscription.
Train one voice
$5.00once
1 training run Any length of training audio, up to 500 epochs per voice. Includes 3 voice conversions.
Train three voices
$10.00once
3 training runs Any length of training audio, up to 500 epochs per voice. Includes 9 voice conversions.
Your voice. Your files. Download your models and use them anywhere RVC runs.
.pth.indexZIP
Starter
For occasional projects
$8.99$8.99per month
Then $8.99 per month.
$5 monthly training credit and 30 voice-conversion download minutes.
Creator
For regular cover makers
$14.99$14.99per month
Then $14.99 per month.
$10 monthly training credit and 90 voice-conversion download minutes.
Pro
For high-volume work
$24.99$24.99per month
Then $24.99 per month.
$20 monthly training credit and 240 voice-conversion download minutes.
Secure checkout by Lemon SqueezyCancel any time from your accountYour model files are yours to keep
A few things to know
Can I hear it before I pay?
Yes. Your first training is free, and every finished model comes with a listening proof before you decide anything.
How do the Lite allowances work?
Lite includes two training runs per paid billing month and 5 voice conversions every 24 hours, measured from when each one starts, not midnight. A conversion counts once when it starts and comes back if it fails; listening and downloads are free. Unused allowances do not carry over. Both subscriptions include unlimited vocal separation, lead/back separation, noise removal, reverb removal and Vocal Enhancer.
What does unlimited actually mean?
No minutes to count on any tool, every output included, up to 500 epochs per training run. Fair use applies. Unlimited also unlocks batch processing: drop multiple files, start once and get a separate result for each. Free and Lite process audio files one at a time. Multi-file training datasets and manual mixes are unchanged.
Do I keep my voices if I leave?
Yes. Every model is a .pth, .index and ZIP you download, and they work anywhere RVC runs.
How do I cancel?
One click from your account, no email needed. You keep everything until the end of the period you paid for, a month or a year.
What if a training fails?
You are not charged for it. A failed or cancelled run releases what it reserved, and an upload that never arrives does not spend your free run.
Do I need an account to pay?
No. Pay with any email. Sign in with that same email on any device and everything you paid for is there.
What happens to my audio?
It is processed for your job and never shared. New trainings keep your original recordings as a private dataset ZIP, plus an MP3 listening preview. Your dataset follows your voice's retention: paid runs stay until you delete them; free runs are kept for 7 days. Older voices may only have the MP3 listening copy. Temporary training files are removed after validation.
Who sees my card?
Lemon Squeezy, the merchant of record. NiceVois never sees card details, and tax is handled at checkout.
Wrong charge or an unused month? Email info@nicevois.com with the checkout email and date; it is reviewed with Lemon Squeezy and returned to the original payment method. Refund policy · Privacy
Secure checkout is being prepared.
Persistent cloud storage
Your model library
Your voice models are files you own. Download them once and no platform can take them away.
Loading…
☁
Paid model packages stay saved until you delete them.
Your model files and private MP3 listening preview remain available after closing the browser. New trainings also keep the original recordings in a downloadable dataset ZIP. Paid voices and their saved datasets stay until you delete them. Free voices and their saved datasets are kept for 7 days; download them before then. Older voices may only have the MP3 listening copy. Temporary training files are removed after validation.
— used
⌁Loading your models
Checking private cloud storage…
What phone audio does well, and where it hurts
Phone recordings are convenient and usually close to the mouth, which is exactly what training wants. The risk is everything else the room contributed.
Record indoors, away from fans, traffic, and open windows - the model learns room noise as part of the voice.
Hold the phone a consistent distance away; large volume swings teach the model an inconsistent timbre.
Turn off any “voice enhancement” or noise-suppression mode if your recorder offers one. Aggressive suppression chews holes in consonants.
Prefer the original file over one that has travelled through a messaging app twice - each re-encode costs detail.
Voice notes from messaging apps
A WhatsApp or iMessage voice note is usable, but it is encoded for small size rather than fidelity. If you have the same words recorded in the Voice Memos app, use that instead. When a voice note is all you have, gather several minutes of it rather than relying on one short clip - length partly compensates for a compressed source.
What the service does with the M4A
The official RVC training workflow reads supported source audio through FFmpeg, decodes it into the representation preprocessing requires, and extracts the features used for training. NiceVois runs that workflow in a pinned cloud environment and validates the exported model before showing the downloads. Nothing about the M4A container needs handling on your side.
M4A versus the alternatives
Question
M4A (AAC)
WAV
Can this tool upload it?
Yes
Yes
Compression
Lossy, but efficient at voice bitrates
Uncompressed
Typical source
Phone recorder, voice note, AAC export
Desktop recording, DAW export
File size
Small
Large
Best choice
Use when the recording was made on a phone
Prefer when you recorded straight to your computer
What you receive
The finished model is available as a named .pth, a matching .index, and a ZIP containing both. The public workspace retains the completed files for the displayed seven-day window, and you can delete an inactive job from your private model library at any time.
Have a voice memo?
Upload the M4A directly - the service prepares the training dataset for you.