Getting started
Upon startup, you're greeted with a view divided into four sections. The intended workflow is from top to bottom, but you're free to use the tool however you like.
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You can always refer to this manual, and if you're offline, you'll find the manual inside the app by clicking Help in the top bar.
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The sections listed below are found in both simple and advanced modes, only their contents slightly changing.
First section,
app menu
This is the app settings panel. Here you can open the help dialog, and switch modes. Startup mode is the simple mode, and by clicking the Advanced button you enter the advanced mode.
Second section,
origins and destinations
This panel lets you select what files to operate, and where to put them after they're ready.
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By pressing 'select files', you can select single files. Multiple files are allowed.
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Choosing 'select folder' you can select a folder containing audio files.
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Your file selection is listed in the fourth section.
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Output Folder lets you choose the desired output folder. This is the place you'll find the processed files.
Third section,
audio settings
This panel controls the settings used in audio processing. In simple mode (read more below) you can select the end format from three options, and you can select whether to normalize the audio or not.
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In advanced mode you get to choose more output formats, choose options for the chosen encoder, normalize to custom targets and write ReplayGain tags.
Fourth section,
processing view
This section lists the files you're about to process. Below the list you will see a Process button, which starts the audio processing work. Once pressed, a status bar will appear, showing you the progress of the task.
Simple mode
What to choose
Choosing an audio format means balancing three factors: fidelity (sound quality), compatibility (what devices can play it), and file size. You typically get to pick two.
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High fidelity with broad compatibility? Large files (WAV, FLAC). Small files with good compatibility? Lower fidelity (MP3, AAC). High fidelity in small files? Limited compatibility (Opus, modern codecs some devices don't support).
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Raw or lossless formats preserve quality but eat storage. Lossy compression shrinks files and plays everywhere, but you're throwing away audio data. Modern codecs can do impressive things with small files, but adoption takes time.
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To make the decision easier, we've labeled the encoders in simple mode by their purpose. You'll find three choices: Small file, Most compatible and Production. You'll also find the technical specification of each in the parenthesis.
About normalization
Normalizing audio means in this case making sure it's up to a loudness standard set by the EBU.
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Simply put, checking this button makes sure your audio will sound exactly as loud as everything else on the channel. This should be enabled at all export stages to either make post-processing easier or making sure the audio is up to standard upon final delivery.
Advanced mode
Encoders
Choose your codec: AAC, Opus, MP3, or PCM (Wave).
Sample rate and bit depth only apply to PCM.
All other codecs use 48 kHz. Bitrate is available for compressed codecs (AAC, Opus, MP3). Range: 12 kbps to encoder maximum.
Loudness controls
'Use custom loudness' lets you set your own LUFS I target and True Peak limit (both in negative values). When unchecked, uses EBU R128 (-23 LUFS, -1 dBTP).
'Normalize' processes the audio to match the loudness target using BS.1770-5. Uses custom values if set, otherwise EBU R128. Cannot be used with ReplayGain tagging.
'Write RG tags' adds ReplayGain metadata to the file without processing audio. Uses custom values if set, otherwise EBU R128. Cannot be used with 'Normalize' (redundant) or PCM source files (no metadata support).
'Do not transcode' writes ReplayGain tags only — no audio processing, no format change. Requires 'Write RG tags' enabled and a non-PCM source file. Results in a new file with ReplayGain tags.
Speech mode
'Speech' forces Opus codec optimized for voice (VoIP-style compression). If normalized, uses speech-appropriate loudness targeting. Do not use for music.
Recent versions
Version 1.0.2
Released: 3 November, 2025
Release notes:
Preserve directory structure in batch processing (directory structure is copied to output directory so that for example Artist/Album/Track structure will remain intact)
Loudness settings are now applied without needing to save UI configuration (saves you two clicks).
Version 1.0.1
Released: 31 October, 2025
Release notes:
macOS users get access to Apple AAC encoder.
Windows users get access to Fraunhofer AAC encoder(deprecates native AAC).
Preferences can now be saved.
Fixes library linking issues on macOS.
Reduces executable size on Windows(225 M to 50 M).
Error reports can now be sent from the app.
Version
Release date
Release notes:
Release notes