10. Mixer avec Mixxx

Mixxx a été conçu pour être facile à appréhender à la fois pour les novices et pour les DJ expérimentés.

This part of the manual provides you with directions for importing and managing you music collection and playing your tracks.

10.1. Opening Mixxx

logo Once you’ve installed Mixxx, start by opening Mixxx and import your music to the Mixxx library.

Windows

Double-click the Mixxx icon on the Desktop. Alternatively, browse your Windows start menu and click the Mixxx icon, or perform a search for Mixxx.exe.

Mac OSX

Double-click the Mixxx icon in the Applications folder. Alternatively, drag the Mixxx icon to the dock and double-click it there, or perform a search for Mixxx.app.

GNU/Linux

Simply type mixxx into the terminal, then hit Return. With some distributions like Ubuntu you can also double-click the Mixxx icon in the launcher. Alternatively, perform a search for mixxx.

10.2. Importing your audio files

Mixxx 1st run - Choose music library directory dialog

Mixxx running on Windows 8 - Choose music library directory dialog

Setup the music library

The first time you run Mixxx, you are asked to select a directory where your music is stored. By default, the dialog points to a location where music files are typically held.

Click Select Folder and Mixxx will scan your music library. Depending on the size of your library this could take some time. All of the supported music files Mixxx detects will be listed in the Library - View and edit your whole collection.

Mixxx automatically detects newly added tracks on each subsequent run. If you want to manually refresh your library without exiting (for example because you added or moved files), you can do this with Library ‣ Rescan Library in the menu. If you want to rescan at every launch, select Preferences ‣ Library ‣ Rescan on startup.

Avertissement

On Windows 7 and 8 the import dialog points to your Windows “Music“ Library, a special-purpose virtual folder. You can not use these virtual folders. Select a regular folder instead, usually “My Music“, like pictured above.

Compatible files

Mixxx supports a variety of file formats: Wave (wav), Aiff (aiff, aif), MP3 (mp3), Ogg vorbis (ogg), FLAC (flac), and AAC (aac, m4a) if supported by your OS. DRM protected files, such as m4p files purchased in the iTunes Store, are not supported.

AAC (M4A) is supported on Windows Vista and Mac OSX 10.5 onwards. On Linux, Mixxx does not have AAC (M4A) playback support enabled by default due to licensing restrictions.

Voir aussi

To enable playback of AAC (M4A) files, you can build Mixxx from source. http://www.mixxx.org/wiki/doku.php/compiling_on_linux#build_with_m4a_file_support

Changing the music directory

The Mixxx music directory can always be changed at a later time in Preferences ‣ Library. You might want to run a library rescan afterwards, select Library ‣ Rescan Library in the menu.

Import external libraries

If you have iTunes, Traktor or Rhythmbox installed, Mixxx allows you to access your tracks and playlists in the Mixxx library, see iTunes, Traktor, Rhythmbox - Using external libraries.

Import remote files

To import audio files which are not in your music library directory, drag them directly from an external file manager or from the Browse section to the track list.

Note

You can not drag complete folders to the library because currently Mixxx can not recursively scan folders for compatible music files.

Import music from CDs

Mixxx can not play music from Audio CDs. Convert the content to compatible files in good quality and add them to them Mixxx library. See https://en.wikipedia.org/wiki/Ripping

10.3. Loading Tracks

Tracks can be loaded into a deck in several ways:

  • Right-click the library track table: Right-clicking on a track in the table will present the options Load in Deck 1 and Load in Deck 2, among others. Making either selection will load a track into a deck.

  • By Utiliser un clavier to load the selected track from library track table.

  • Drag-and-drop from library track table: Dragging-and-dropping a track from the track table onto a waveform display will load a track into a deck.

  • Drag-and-drop from external file browser: Dragging-and-dropping a track from an external file browser directly onto a waveform display in Mixxx will load that track. This function also works with some other applications. For example, on Mac OS X, dragging-and-dropping a track from iTunes onto one of Mixxx’s waveform displays will load that track into a deck.

10.5. Previewing Tracks

Nouveau dans la version 1.11.

To pre-listen to a track, activate the Preview column in a library view. Clicking the Library - Preview Play icon in the library’s Preview column loads the selected track in a special Preview Deck that will only output sound in the headphones channel. Click the Library - Preview Pause icon to stop the playback.

Alternatively, select a track from the track list of the Mixxx library, drag the track to the waveform view of the Preview Deck and click the Play button next to the waveform.

To display the Preview deck, press CTRL + 4 (Windows/Linux) or CMD + 4 (Mac).

10.6. Waveform displays

There are two main waveform displays in Mixxx that are used to display the waveform of the tracks you are mixing. These are useful because they allow you to see features in a track (like a breakdown) before you hear them.

Depending on the skin Mixxx displays either separate waveforms (default) or parallel waveforms. Select your preferred appearance in Preferences ‣ Interface ‣ Skin.

Mixxx default skin (Deere) - Separate waveforms

Mixxx default skin (Deere) - Separate waveforms

With some skins the waveform displays are aligned parallel to each other in order to make beatmatching easier, as it is possible to beatmatch visually by aligning the beats that appear in each waveform.

Mixxx alternative skin (Latenight) - Parallel waveforms

Mixxx alternative skin (Latenight) - Parallel waveforms

The mouse can be used on the waveforms to scratch, spin-back or throw the tracks. Right-clicking and dragging on the waveforms allows you to nudge the track and make temporary pitch adjustments. Using the mouse-wheel on the waveform zooms the waveform in or out. You can choose whether or not to synchronize the zoom level between the decks in Preferences ‣ Interface ‣ Waveform Display ‣ Synchronize. The waveform display is updated in realtime upon seeking.

There are two smaller waveform summary displays located adjacent to the main waveform displays. Clicking on a waveform summary allows you to seek through the track. These smaller displays show the waveform envelope of the entire track, and are useful because they allow DJs to see breakdowns far in advance. Vinyl DJs will find this familiar because quiet sections of tracks can be visually distinguished when looking at a vinyl record. This is a useful tool when planning your mixes on-the-fly.

10.7. Le beatmatching et le mix

Le Beatmatching est le procédé qui permet d’ajuster la vitesse de lecture d’une piste pour qu’elle corresponde au tempo d’une autre piste. Le beatmatching implique aussi l’ajustement de la phase des battements d’une piste pour qu’ils soient alignés avec les battements de l’autre piste. Faire correspondre le tempo et aligner les battements sont les deux choses qu’un DJ doit faire pour le beatmatch.

Mixxx can match the tempo and align the beats for you but this requires an accurately detected BPM value and a correct beat grid for both tracks. To enable this feature, hit the SYNC button. To beatmatch manually, the tempo of the two tracks must be synchronized by adjusting the playback rate sliders. You can adjust the phase of the beats by right-clicking and dragging on either waveform display to temporarily speed up or slow down one of the tracks until the beats are aligned. The temporary pitch bend buttons can also be used to momentarily adjust the playback rate, allowing you to “shuffle” the beats in a track forwards or backwards, so they can be aligned with another track. See the chapter Contrôles de vitesse et de synchronisation.

Two tracks are beatmatched once their tempos are matched and their beats beats are aligned. A “perfect” beatmatch is nearly impossible - there will always be a tiny difference in the playback rates. A keen DJ will keep his or her ears open and listen for the beats drifting out of alignment. This has a distinct “double bass kick” sound which is often preceded by the kick weakening in intensity as the two kicks drift out of phase. When this happens, the beats can be realigned by simply tapping one of the temporary pitch bend buttons a few times in the appropriate direction.

10.8. Headphone Cueing

Headphone cueing is a technique DJs use to listen to the next track they want to play in their headphones before playing it on the main speakers. Headphone cueing is useful because it allows a DJ to beatmatch the next track in their headphones before bringing it into their mix by sliding the crossfader.

Mixxx allows a DJ to route audio from either deck to their headphones by toggling either of the Headphone buttons in the mixer section of Mixxx’s interface. See the chapter La Section Table de mixage.

10.9. BPM and Beat Detection

Previous versions of Mixxx were able to detect BPM values but unable to determine where the beats are. Consequently, the beat grids often looked unaligned. The DJ had to adjust the beat grid manually in oder to make use of auto-beatmatching via SYNC button.

Modifié dans la version 1.11: Mixxx comes with a new ultra-precise BPM and beat detector.

The beat grid is adjusted after track analysis is finished. Manual adjustments are redundant in many cases because Mixxx knows where the beats are.

10.9.1. Analyser Settings

BPM and beat detection is a complex operation. Depending on your computer and the track’s bitrate and duration this may take some time. By default Mixxx analyzes the complete track. To accelerate beat detection on slower computers, a “Fast Analysis” option is available. If enabled, the BPM is computed by analyzing the first minute of the track. In most cases this does not affect the beat detection negatively because most of today’s dance music is written in a 4/4 signature with a fixed tempo.

Mixxx preferences - BPM settings

Mixxx preferences - BPM settings

The table below summarizes the beat detection settings:

Option

Description

Enable Fast Analysis

If enabled, BPM detection results from the first minute of audio.

Assume constant tempo

If enabled, Mixxx assumes that the distances between the beats are constant. If disabled, the raw beat grid obtained by the analyzer is presented. The latter is appropriate for tracks with variable tempo.

Enable Offset Correction

Prevents beat markers from being placed incorrectly.

Re-analyze beats when settings change or beat detection data is outdated

If enabled, Mixxx over-writes old beat grids from Mixxx before v1.11. Moreover, it will re-analyze the BPM if your beat detection preferences change or BPM data from 3rd party programs are present.

10.9.2. Correcting Beat Grids

There may be situations where BPM and beat detection do not result in a proper beat grid.

Typically, the detected BPM is correct but the analyzer has failed to detect the location of the first beat. Consequently, the beat markers are shifted, i.e. the beat markers are always a fixed distance from the true beat. To adjust the beat grid, cue the track before a real beat and click the Beat-grid Adjust button in the Boîte de boutons d’options de platine.

If the detected BPM is not accurate, the corresponding beat grid will also be inaccurate. A deviation of 0.02 BPM units from the correct BPM will cause beatgrid alignment issues on long tracks (e.g. a club mix). If this happens, your beatgrid may look aligned for the few minutes but you will notice a slight drift as the song goes on. Finding the correct BPM is easy in many cases - just follow the note below.

Note

If the detected BPM value is not sufficiently accurate but very close to an integer value, try to set the BPM value manually to the integer.

10.10. Recording your Mix

With the integrated recording feature you can record your mix as an audio file and listen to it later, distribute it as Podcast or burn it to CD. Mixxx records the master output - the audio you hear from the speakers including the microphone.

Mixxx library - Recordings view

Bibliothèque de Mixxx - Vue Enregistrements

Nouveau dans la version 1.11: Allows to specify a custom recordings directory

Mixxx peut enregistrer votre mix dans divers formats audio et réglages de qualité. Vous pouvez diviser vos enregistrements, générér des fichiers .cue, choisir un répertoire d’enregistrement personnalisé et même définir vos propres métadonnées. Par défaut, Mixxx enregistre vos enregistrements en fichiers wav sans pertes dans un sous-dossier Mixxx/Recordings dans le répertoire de musique de Mixxx. Avant de commencer à enregistrer, nous vous recommandons d’ajuster les réglages dans Préférences ‣ Enregistrement.

Si vous cliquez sur l’icône Enregistrements dans la barre latérale de la bibliothèque de Mixxx, le tableau des pistes sur la droite affiche le contenu de votre répertoire d’enregistrements. Les nouveaux enregistrements sont automatiquement enregistrés dans ce répertoire ainsi que les fichiers .cue si vous choisissez de les créer dans les préférences.

10.10.1. Enregistrer votre mix sur le disque

  • Cliquez sur l’icône Enregistrements dans la barre latérale pour basculer en vue Enregistrements

  • Cliquez sur le bouton Démarrer l’enregistrement ou sur :menuselection:`Options –> Enregistrer le Mix dans le menu en haut de la fenêtre de Mixxx.

  • The display above the track table shows how much data has already been recorded.

  • Exécuter votre mix

  • Cliquez sur le bouton Arrêter l’enregistrement pour arrêter l’enregistrement quand le mix est terminé.

Indication

You can instantly play your recording as track in Mixxx. Simply drag-and-drop the track to a deck.

10.10.2. Burn your recorded mix to a CD/DVD

  • Select your recording in the Recordings view

  • Right-click and select Open in File Browser to locate the file on your disk

  • Now burn the recording to a CD/DVD using a 3rd-party program, for example CDBurnerXP for Windows or Burn for Mac OS X.

Note

Due to licensing restrictions, MP3 recording is not enabled per default. In order to enable MP3 streaming you must install the LAME MP3 codec yourself. Go to the chapter Activer la prise en charge de diffusion MP3 for more information.

10.11. Using Auto DJ for automatic mixing

Mixxx library - Auto DJ view

Bibliothèque de Mixxx - Vue Auto DJ

L’Auto DJ vous permet de charger automatiquement des pistes depuis la liste de lecture Auto DJ quand la piste actuelle est presque finie, et d’y effectuer un fondu enchaîné. Voir Auto DJ - Automatiser votre mix.

10.11.1. Charger des pistes vers l’Auto DJ

Pour jouer des pistes automatiquement, elles doivent tout d’abord être chargées dans la liste de lecture Auto DJ. La liste de lecture Auto DJ est vide par défaut.

Mixxx library - Adding a playlist to Auto DJ

Bibliothèque de Mixxx - Ajouter une liste de lecture à l’Auto DJ

Il y a plusieurs manières de charger des pistes dans la liste de lecture Auto DJ :

  • Sélectionnez une ou plusieurs pistes depuis la bibliothèque, une liste de lecture classique ou un bac et faites-les glisser dans l’icône Auto DJ sur la gauche.

  • Sélectionnez une liste de lecture classique ou un bac, faites un clic-droit avec la souris et sélectionnez Ajouter à la file Auto DJ depuis le menu de la souris. Ceci ajoute toutes les pistes à l’Auto DJ.

  • En vue Auto DJ de la bibliothèque, faites glisser des pistes depuis un gestionnaire de fichiers externe vers l’icône Auto DJ dans la barre latérale ou dans le tableau des pistes Auto DJ sur la droite.

10.11.2. Jouer des pistes en Auto DJ

Maintenant que vous avez chargé des pistes dans la liste de lecture Auto DJ, vous pouvez activer l’Auto DJ comme suit :

  • Cliquez sur l’icône Auto DJ dans la barre latérale pour basculer en vue Auto DJ de la bibliothèque.

  • Cliquez sur le bouton Activer Auto DJ

  • Les premières pistes de votre liste sont chargées dans les platines et la lecture commence.

  • Mixxx va continuer à mixer automatiquement jusqu’à ce que la liste de lecture Auto DJ soit vide.

  • Cliquez sur le bouton Arrêter Auto DJ pour arrêter le mixage automatique