Export Format Profiles
An Export Format Profile specifies the file format in which Ardour will export audio files, and also other audio file export options.
Export Format Profiles are edited via the Edit Export Format Profile dialog.
The Label field allows to choose the name which will be shown for this format in the drop-down list of export formats in the 'File Formats' tab of the Export dialog.
If enabled, levels of exported files will be normalized to the level chosen here. The normalization can be either:
- Peak, which adjusts the gain to bring the highest signal peak to the chosen level (in dBFS),
- Loudness, which adjusts the gain to bring the average amplitude to the chosen level (in LUFS), without exceeding the chosen true-peak value (in dBTP). EBU R128 is only available for mono or stereo sounds while true-peak works for any channel layout.
Trim silence at start/end
These checkboxes allow to remove any part Ardour considers silent (< −90dB), at the beginning or/and end of each exported track.
Add silence at start/end
These checkboxes allow to add silence at the beginning or/and end of each exported track. The duration of the added silence can be manually fixed in the adjacent 'timer' input fields.
This section adds watermarks to the exported audio (e.g. for limited/demo distribution), by overwriting part of the audio with white noise in the exported file.
Both the Mode (how often and how long) and Noise Level (how loud) can be set.
Selecting an item in the 'Compatibility' emphasizes the settings in the other columns that are compatible with the selected standard, by turning incompatible options red. When an incompatible quality/format/sample rate is selected, the compatibility column checkbox disappears.
The appropriate item in the 'Quality' column will be highlighted when a file format is chosen. At the moment, selecting a Quality setting does not show the compatible File formats.
This column contains a list of Ardour's supported export file types. Selecting one updates the options underneath it.
Note: For MP3 export Ardour relies on libsndfile v1.1.0 and newer to encode the file. For Opus support, Ardour requires a build of libsndfile from git (or future 1.2.0 release). This comes bundled with official Ardour binaries.
A specific sample rate can be chosen for the exported files, or the current session's sample rate (by choosing 'Session rate'), without sample rate conversion.
Options relevant to the chosen file format will appear just to the right of the Compatibility/Quality/File format/Sample rate table.
Sample rate conversion quality
In case the chosen sample rate does not match the current session's sample rate, the sample rate conversion quality can be chosen here. Better quality options are slower.
These options are presented whatever the chosen format is:
Tag file with session's metadata
If the exported file format supports metadata (e.g. FLAC, Ogg Vorbis), use data entered in the Session Metadata window to tag the exported files.
Create CUE/TOC/chapter mark file
As well as exporting an audio file, Ardour can create a file (in CUE, TOC or MP4ch format respectively) containing CD track information, as defined in the Ranges & Marks List. Those files can then be used to either burn a CD or DVD, or to create "chapters" inside a compatible mp4 video container.
If this is not blank, it is considered as a command to be run after the export of each file. Either the command must exist in $PATH, or an absolute path to an executable file can be specified here.
Certain sequences are allowed here to stand for the exported file name and various parameters. Currently these are:
- %a: Artist name
- %b: File's base-name
- %c: Copyright
- %d: File's directory
- %f: File's full absolute path
- %l: Lyricist
- %n: Session name
- %o: Conductor
- %t: Title
- %z: Organization
- %A: Album
- %C: Comment
- %E: Engineer
- %G: Genre
- %L: Total track count
- %M: Mixer
- %N: Timespan name
- %O: Composer
- %P: Producer
- %S: Disc subtitle
- %T: Track number
- %Y: Year
- %Z: Country
Any part of the command-line enclosed in double-quotes (") will be used as-is.
For example, exporting an mp3 file can be done by inserting
lame -b320 %f
which will convert the exported audio file ('%f') to a 320 kbs mp3 using the lame encoder
(provided lame is installed first on the system).