100 lines
4.3 KiB
Markdown
100 lines
4.3 KiB
Markdown
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title = "Routing between applications"
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chapter = false
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weight = 7
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#pre = "<b>1. </b>"
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+++
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Sometimes you may need to record the audio output of another program into Ardour (for example, the sound of a
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YouTube video playing in Firefox, or the output of SuperCollider or PureData). This chapter shows how to accomplish that.
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The examples on this page were created on a computer running Ubuntu
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Linux. Beware that things may work differently if you are on another OS
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(in particular if you are using a Mac, in which case you will be using
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JackPilot). The general principles are always the same, though.
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### From your browser to Ardour
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Web browsers (Firefox, Chromium, etc) are not JACK-aware applications.
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Luckily, systems such as KXStudio and UbuntuStudio come with a bridge
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application between regular system audio (like PulseAudio) and JACK. This
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tutorial assumes you are using a computer with this bridge already
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running and working.
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The overall steps to record audio from YouTube (or any other sound
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coming from your browser) into Ardour are:
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1. Create a Stereo Track in Ardour
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2. Disconnect Hardware sources from Track inputs
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3. Connect PulseAudio Jack Sink to Track inputs
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4. Start recording into the Track
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5. Start playing the YouTube video
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For this example, a new session was created with a new Stereo Track
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named "*Firefox*":
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Then we select the Track and click on the Inputs button on the Editor
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Mixer strip. In the screenshot above, it's the button just below the track name ("*Firefox*") in the Editor Mixer
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strip (it shows only a "-" (dash)in the example above, meaning that there are no connections made yet). We are presented with the Patchbay window specific to that
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Track's inputs.
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First thing to do is to disconnect any microphone inputs from that track
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("*system capture*"), if any. After disconnecting, this part of matrix
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for the "*Firefox*" Track should look like this (no green dots):
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Next step is to change tabs in this same window. Choose "*Other*" as the
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source. This is where you will find other running applications that can
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be sound sources to Ardour. On a Linux computer with PulseAudio Jack
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bridge, you will see "*PulseAudio JACK Sink*" as a source. Click on the
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appropriate empty squares to create connections (green dots) between
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"*front-left*" and "*front-right*" to the Left and Right inputs of the
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"*Firefox*" Track. It should eventually look like this:
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Now you are ready to go. Simply follow the same recording procedures
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explained in the **Recording Audio** chapter: record-enable (arm) the
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Track (small red circle on the track), arm Ardour to record (big red
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button; it starts blinking), then hit the Play button. Go back to your
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browser and start playing the YouTube video.
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### From JACK-aware applications to Ardour
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Other music software like SuperCollider, Hydrogen, and PureData are
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JACK-aware. This means they will show up directly as source and
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destination options in Ardour's Audio Connection Manager. You don't need
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to worry about any PulseAudio / Jack bridge as in the YouTube example
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above.
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The procedure is essentially the same: create a Mono or Stereo Track to
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record the audio, set that Track's inputs to the desired source, and
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record as usual.
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The screenshot above was taken while recording a drum pattern from
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Hydrogen directly into an Ardour track named "*from Hydrogen*".
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Hydrogen's window is on the right. Ardour's Patchbay window was left
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open for demonstration: notice that the application "*Hydrogen*" shows
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up as a source under the "*Other*" tab. It is connected directly to the
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inputs of the track. Also notice that SuperCollider (another jack-aware
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application) happened to be open at the same time, though its window is
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not visible in this screenshot. SuperCollider provides 8 default sound
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outputs, all of which show up as potential sources in Ardour's Patchbay.
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Continuing
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----------
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This concludes the **Getting Started** chapters. Now that you have
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some audio imported, recorded from a line or microphone input, or even
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from another application, proceed to the **Arranging Tracks** section and learn how to arrange your composition.
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Next: [ARRANGING TRACKS](../arranging-tracks)
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