This article walks you through setting up audio I/O interfaces in Reeltime Pro:
- Connect your audio interface(s) to your machine
- You can connect any audio source that is supported by macOS, including embedded audio channels from SDI signals via the drivers by AJA and Blackmagic
- Open Reeltime Pro’s audio settings
- The audio settings allow selecting multiple audio input devices and mixing their channels into one dual-mono audio output signal for recording and monitoring

Audio settings with multiple audio inputs
- The “Input Devices” list displays all audio devices connected to your machine.
- You can enable all channels you want to use. Each channel has an individual volume slider.
- The “Input Delay” setting allows you to add an audio delay to the audio recording to keep it in sync with the video signals
Note: If a device is not configured to 48 kHz, it is displayed in red and cannot be used. However, you can open the Audio MIDI Setup to configure the device to 48 kHz.
- For audio monitoring and playback, you can choose an output device or select to use the system’s audio output device
- The audio meters in the toolbar visualize the active audio in green (for playback), blue (for monitoring), and grey (if the audio is muted)
There are menu items (in the audio menu) and associated Stream Deck controller actions for muting the live audio or all audio, as well as an associated global mute toolbar button.
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