Convert M4B to WV

Turn M4B recordings into WavPack. Stored as 24-bit WavPack, which keeps the decoded sound exactly but cannot bring back what the AAC lost.

Converted in an isolated sandbox on our serversDeleted after 24 hours

Drop M4B files on the dialor turn it to pick what to do

M4B and WV

From

M4B Audiobook

AAC audiobooks in an MP4 container with chapters. What Apple Books and most audiobook apps play.

Extensions: .m4b
MIME type: audio/mp4
Kind: Audio

To

WavPack

WavPack lossless and hybrid audio.

Extensions: .wv
MIME type: audio/x-wavpack
Kind: Audio

Options for M4B to WV

audio.channels: Number of audio channels. 1 is mono, 2 is stereo.
audio.denoise: Reduce steady background noise.
audio.normalize: Normalize loudness to -16 LUFS as streaming services do.
audio.sample_rate: Audio sample rate in Hz.
speed: Playback speed multiplier. 2 plays twice as fast.
trim_end: Second at which the audio or video stops.
trim_start: Seconds to cut from the start of audio or video.