Connect the direct output from any input channel to a multi-track tape machine or digital recording device. The cable you use to connect the device will vary depending on whether or not your recording device has balanced or unbalanced connections. In most cases, direct outputs on a 24-8 Mackie mixer will be able to accept and send balanced TRS signals or unbalanced ¼ inch cables according to TweakHeadz Lab, a website that provides free information about recording equipment and technology.
Send the direct output of a subgroup to a headphone amplifier to be monitored while recording via the appropriate cabling, which will vary based on exact models used. Using a direct output from a subgroup to make a headphone mix for a performing musician can save you much-needed inputs and outputs assuming that the mix coming from the subgroup contains all of the audio the musician needs to play her part. An example would be sending a bass player the information from the drum subgroup.
Use a direct output to send a signal from your console directly into a sound card. Cabling will vary depending on the exact sound card and mixer you are using. According to TweakHeadz Lab, direct outputs are ideal for sending audio to a sound card because they have balanced outputs.
Route the direct outputs of a subgroup, individual channel or stereo bus to a patch bay via the appropriate cabling. This gives you the ability to send the signal to a variety of devices including a headphone amp, recording device, computer, DAT machine or any other devices at the same time. Use a balanced patch bay for the best audio quality.
Connect the direct outputs of the stereo bus to a secondary two-track recorder during live sessions. From there, you can make CDs for musicians to take home to learn parts and ensure you don't lose valuable recordings you won't be able to capture again. Use balanced cabling if possible.