// ACX VALIDATOR
ACX Audiobook Audio Validator
Check if your audio files meet ACX/Audible technical requirements. Upload a file and get an instant pass/fail report. Free — no sign-up required.
Drop your audio file here
WAV, MP3, FLAC, OGG — max 50MB
ACX Technical Requirements
RMS Level-23dB to -18dB
Peak Level≤ -3dBFS
Noise Floor≤ -60dB
Sample Rate≥ 44.1kHz
ChannelsMono
FormatWAV or MP3 (320kbps)