Mix Check
Hear your mix the way your client will.
What will it sound like
Studio
Your file exactly as it is: the reference for everything else.
Listen for
The balance you signed off. Come back here after every other device.
Tone of this device
Within 3 dB: 20 Hz to 20 kHz
Tone only. Dynamics, stereo width and room are not drawn, but you hear them.
AGCOM check
Drop an audio file here
Processed on your device. Nothing is uploaded.
Send the right version to the right place
Your mastering studio
To the mastering engineer
DeliverMix
WAV 24-bit at the session's sample rate · peaks around −6 dBFS
No limiter or loudness processing on the master bus: leave the mastering engineer room to work.
WhatsApp, email, WeTransfer
To the client for approval
DeliverMaster
The master as WAV, or MP3 at 320 kbps
Send the master, not the mix: the client will compare it with finished records. On WhatsApp, send it as a Document so it arrives exactly as exported.
Spotify, Apple Music, YouTube, Amazon Music
Streaming
DeliverMaster
Normalised to about −14 LUFS (Apple Music about −16) · true peak ≤ −1 dBTP
A louder master is simply turned down. If you master hotter than −14 LUFS, keep true peak under −2 dBTP.
Mediaset, RAI and the other Italian channels
TV in Italy
DeliverAGCOM version
Mediaset −24 ±0.5 LKFS · RAI −23 ±0.2 LUFS, true peak ≤ −2 dBTP
AGCOM compares every spot with the channel's level using a gate of 8 LU, not 10: an R128 master can measure differently here. Always ask for the current spec sheet.
Broadcasters following EBU R128
TV in Europe
DeliverEBU R128 version
−23 ±0.5 LUFS · true peak ≤ −1 dBTP
Many broadcasters add their own short-term or peak limits: their delivery sheet decides.
FM and DAB+
Radio
DeliverMaster
The master with some headroom · true peak ≤ −1 dBTP
The station's processor compresses everything again: no need to crush the master. For radio spots, ask the sales house for its specs.
Apple Podcasts, Spotify, RSS feeds
Podcast
DeliverPodcast master
−16 ±1 LUFS · true peak ≤ −1 dBTP
Voice first: keep music beds well under the dialogue and check it on earbuds.
Club PA systems, DJ sets
Club and DJ
DeliverMaster
The master as WAV or AIFF, 24-bit
No MP3s. Keep the low end mono below about 100 Hz and check it in the Club simulation.
Sources
- AGCOM, delibera 219/09/CSP (PDF)
- Publitalia '80, technical specifications (PDF)
- EBU R128
- Spotify for Artists, loudness normalisation
- Apple Podcasts, audio requirements
RAI figures from “Specifiche tecniche per la fornitura di spot pubblicitari televisivi in formato HD”, February 2021. Figures checked in October 2026. Specifications change: always ask for the current one.
What Mix Check is
In your browser
Mix Check on the web
Load a finished mix and check it before it goes out. Nothing is uploaded: the audio stays on your device.
Desktop appAlpha
Mix Check for Mac
An app for checking the files themselves, a whole folder at a time, before they reach a client.
- Flags file names that don't match the file: a “48k 24bit” bounce that is really 44.1 kHz, 16-bit.
- Finds clicks and cuts that miss a zero crossing, down to the sample.
- Measures loudness and true peak, with waveform and spectrogram.
- Compares versions in sync and exports to WAV, AIFF, FLAC, AAC, MP3 or OGG.
Mix Check for Mac
Test the alpha
Download the build and try it. The install steps are in the disk image. Tell us which Mac you have and what worked or didn't.
Needs a Mac with Apple Silicon (M1 or newer) and macOS 11 or later.