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Streaming with OBS + DDJ-1000 (Mac) + External Input

This guide is a how-to for streaming using a 3rd party software such as OBS, and many of these instructions may also be applied to other software.

The instructions provided herein are based around a DDJ-1000, and may be different for other DDJ units. Please check the DDJ section of the Knowledge Base for additional tutorials.

This particular guide is for streaming from a DDJ-1000 either as with an external input such as a turntable or CDJ, or using the DDJ-1000 as a stand-alone device (in which case, skip over the rekordbox component below). If you are NOT using an external input, follow this guide instead

Step 1 - Update

Ensure that you are running the latest version of rekordbox, that your drivers and firmware are up-to-date, and that your broadcast software is current as well.

Step 2 - Download the Necessary Software

There is just one extra tool necessary for us Mac users:

You can also use other similar applications such as Sound Siphon or Loopback, but those are both paid apps and Soundflower works, and is free, so why not?

Step 3 - Create an Aggregate Audio Device

With your DDJ connected and powered-on, open Applications > Utilities > Audio MIDI Setup - if the Audio Devices window is not visible, click Window > Show Audio Devices.

Click the icon at the bottom left and select Create Aggregate Device.

Audio-Devices-Agg.png

Click on the name Aggregate Device and rename it DDJ+SF.

Audio-Devices-Rename.png

It CAN NOT contain the word "DDJ-1000" or rekordbox will recognize it as that device and the additional outputs will NOT be available.

In the right window, check the box beside DDJ-1000, then check the box beside Soundflower (2ch).

Audio-Devices-Select.png

Quit Audio MIDI Setup.

Step 4 - Configure rekordbox Audio

Nothing changes in rekordbox as far as your audio device is concerned; keep everything configured for the DDJ-1000.

Screen_Shot_2018-12-13_at_22.05.34.png

Step 5 - Configure Jack

Open the JackPilot application (you won't need to use the qjackctl application, so don't worry about that), and open the Preferences (there is no button, do it through the menu or press Command + , ).

Configure your setup as shown:

Jack-Prefs.png

Be sure to un-check System port monitoring and Auto-Connect with physical ports as well. Click Save, then click Start on the main JackPilot window.

Click the Routing button and the Connections Manager window will open. Toggle the triangles beside system in both the Send Ports and Receive Ports panes of the Connections Manager window.

Jack-Connections.png

To patch the audio between the correct ins and outs, you'll first select the item you want to patch, then double-click on the item you're patching it to. This one is simple as there's only 2 to patch. First click capture_11 and then double-click playback_7. You'll see it turn red, and system:capture_11 will appear in the Connections pane. Repeat to patch capture_12 to playback_8.

Clicking the System item in the Send Ports pane should look like this:

Jack-Assigned.png

You can now close the Connections Manager window.

Step 6 - Configure OBS for Audio

Minimize rekordbox and launch OBS.

Click the + button at the bottom of the Sources window to add a new Audio Input Capture source.

 Screen_Shot_2017-10-23_at_22.35.51.png

You can keep the defaults, click OK.

Screen_Shot_2017-10-23_at_22.36.59.png

Select Soundflower (2CH) from the Device drop-down.

OBS-Select.png

Click OK.

If you're only streaming audio, you can skip ahead to Step 8.

Step 7 - Configure OBS for Video

If you want to stream a capture of your screen or video input (or both) you can add these as well.

Click the + button at the bottom of the Sources window to add a new Display Capture source, you can keep the defaults and click OK.

 Screen_Shot_2017-10-23_at_22.41.10.png

If you have multiple displays, select the output display you want to use. 

Screen_Shot_2017-10-23_at_23.50.00.png

Click OK.

Please note, as an alternative to Display Capture, you may try using the Window Capture function. Whether this works depends on the graphics chipset(s) you have in your Mac. If you find the Window Capture freezes OBS or does not show your waveforms within rekordbox, then use the Display Capture.

If you are showing the rekordbox output, as opposed to a video input source, you should match your input size. Open Settings > Video and change the Base (Canvas) size to match the resolution of your display.

Screen_Shot_2017-10-23_at_22.49.12.png

The Output (Scaled) size should typically be 720 or 1080 to keep a down-sampled resolution that is friendly for your broadcast.

Click OK.

You can also (optionally) add a webcam or other video input and configure it here. If you require further instruction on this, try Google.

Step 8 - Broadcast

Click the Studio Mode button to enter a dual-view mode. With music playing in rekordbox, you should now see an audio level in the meter at the bottom, and a video preview (if applicable).

Screen_Shot_2017-10-24_at_01.26.15.png

Be sure to adjust the levels on the mixer for any other audio sources; mute the other inputs if they're not being used. You're ready to broadcast - simply configure your output stream destination!

Step 9 - Tweak

You should test and monitor the workload and buffer on your computer as you perform - chances are the CPU usage won't be the issue, but the audio buffer may still run out. As you increase the buffer, the latency (delay between action and audio output) will increase, but the likelihood of audio dropouts or crackling will decrease. Your computer's age will typically increase the buffer sizes required, but there are tricks you can do to reduce background application usage and improve the overall performance of your Mac.

If you find the audio level a bit low (because there is inherent overhead in the DDJ-1000 to prevent digital clipping), open the Advanced Audio Properties by clicking the gear icon in the mixer section of OBS. If you don't see the mixer, click View > Docks > Mixer.

OBS-Advanced.png

Adjust the volume percentage:

Screen_Shot_2018-12-13_at_22.21.39.png

I've found that 350% gives me peaks of around -4dB on the stream with channel peaks on the DDJ-1000 keeping the 0dB LED illuminated fairly solid. Adjust to what works best for you.

Notes

This guide was made using the following software versions:

  • macOS Mojave v10.14.1
  • rekordbox v5.4.2
  • Soundflower v2.0b2
  • OBS Studio v22.0.3

While efforts will be made to keep up with any changes to this process to ensure others can use it after software update have been released, we can't guarantee the accuracy or relevance of this information, nor the performance of any 3rd party software applications.

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