by Bremmers Audio Design 
Audio/MIDI multitrack recording software for Windows/Mac and iPad
iPad version
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July 19, 2019
MultitrackStudio 9.4 released

June 24, 2019
MultitrackStudio for iPad 3.5 released

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Manual : Songsprev next


MultitrackStudio project files are called "songs". A song file (.hdr file extension) contains all information that is required to reproduce the mix you made. This includes:

  • The number of tracks and other mixer sections.
  • The position of all their knobs, effects, names of audio/MIDI files etc.
  • Sample Rate used
  • Song Comments
  • Chords and Lyrics
  • Markers

A song file does not include any audio or MIDI data, it contains only references to the audio/MIDI files used by the tracks (ie. these audio/MIDI files are needed in order to play back the song). All filenames that are stored in the song file have a relative path whenever possible. This way projects can easily be moved to other drives or folders.

Note: The devices used for playing audio and MIDI are NOT part of the song file. This way songs can be used on any computer.

Mac note: Finder will show the song files as Radiance files. If you want to be able to open songs by double-clicking you can Ctrl-click a song, choose Get Info and change the "Open with" field to MultitrackStudio.

The currently opened song is shown in the main window's title bar. '(R)' indicates the file is opened as read only.

The Song menu

The Song menu contains the following options (note that some options are described in other chapters):
New Song window
New Song window (Pro edition)

  • New: In the New Song window you can type the name of the new song. It will be placed in a folder having the same name automatically unless you browse for a folder yourself.

    The Template box (Pro edition only) lets you apply a template. The Template box also allows for creating new templates: the Save current as template... option creates a template based on the current song. Templates include almost everything related to the song, except for the audio and MIDI data in the tracks. New songs will have empty audio/MIDI files.
    There's a special "Identical to current" template which creates a new song identical to the current one. This can be convenient for live multitrack recording.
  • Open: Open a song file.
  • Save: Save the song file and all MIDI files and edited audio files (.aem files) opened in tracks.
  • Rename: Rename the song.
  • Close: Close the song.
  • Comments: Read or write text which is stored in the song file. You can use this to document the project.
  • Import Song: Import a zipped song (ie. a song exported using the Export Song option).

The Song menu offers several export options:

Export MIDI Tracks

This tool merges any combination of the currently loaded MIDI tracks in a single MIDI file. It's intended for moving your MIDI tracks to third party notation software. The current versions of the tracks are used (ie. the MIDI files are not read from disk), so you can temporarily edit MIDI channels, or quantize tracks if necessary.

If a MIDI channel is used by multiple tracks a message will appear. You can choose 'Export as-is' or 'Merge Tracks'. The first option is best if the file is to be imported in a notation program etc. The latter option can be used if the file is meant to be played back by a (General MIDI) media player. Note that you'll have to make sure there's just one track playing notes to a particar MIDI channel at any time.

Export tracks as audio files

"Export tracks as audio files" window
Note: this feature is available in the Pro edition only.

This tool exports the tracks as audio files. You can use this if you're going to have your tracks mixed by someone who doesn't use MultitrackStudio. Audio tracks and MIDI tracks using a software instrument can be exported. Any audio effects in the track effect slots are not included.

Bit Depth can be "Optimal" or "32 bit float". "Optimal" uses the lowest bitdepth that won't cause any loss of quality for each track.

Note: if a MIDI track has multiple streams only the first stream will be exported. You can click the track's file name box and choose Split Streams to split it into multiple single-stream tracks.

Export Song

"Export Song" saves the song in a .zip file. This makes it easy to move the song to another computer or to iPad. The zip file only contains files that are required to playback the song, ie. the files found by the Clean up Song Folder tool aren't included.

Exporting to MultitrackStudio for iPad

Zipped MultitrackStudio songs can be imported in MultitrackStudio for iPad, provided you take care of a couple of things:

  • MIDI files containing multiple streams (instruments) are not supported. Click the track's file name box and choose 'Split streams' first.
  • There can't be more than 16 tracks (32 if Extension Pack is present, 64 if the Track Pack is present).
  • Song samplerate can't be higher than 48 kHz.
MultitrackStudio for iPad doesn't support the following features (but the song will be usable nonetheless):
  • No Groups, just one Effect Return (Pro Extension supports either an extra Effect Return or up to 8 Groups).
  • Just two output channels in the Song Options --> 'Outputs' setting (unless Pro Extension is available).
  • Just three effect slots per mixer section.
  • No VST/AU plugins.
  • No Sampler or Wheel Organ.
  • No Doubler, Exciter, Mid/Side Effect, Multi Effect, Parallel Effect or Stereo Effect effects.
  • Convolutor, Dynamics, Phase Inverter, Transposer and Vocal Tuner are part of Pro Extension.
  • No sidechaining (Pro Extension adds sidechaining with Dynamics effect).
  • Automation is part of Pro Extension.
The zip file can be moved to iPad using iTunes File Sharing.
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Last update: July 20, 2019