No audio playback during analog video capture in DR

When digitizing analog video in Davinci Resolve with brand new Mac Mini M1 and UltraStudio HD Mini, I have video playback during capture, but no audio playback. DR is capturing the audio-- I hear the audio when I play the finished file after capture in both DR and QuickTime, and I see the audio levels during capture. The video plays back during capture just fine, I just can't hear the audio playback during capture. Not sure if it is an issue with my DR settings (see below), or if I need an audio monitor.

Initially, I had the problem in DR where I couldn't hear audio at all, but I did that thing where you patch the bus output. That solved the issue of not being able to hear any audio in DR, but it didn't fix the issue with audio playback during capture.

Preferences
• Memory & GPU
○ Memory Configuration (Default)
§ System memory 16.0
§ Limit Resolve memory usage to: 12.0 GB
§ Limit Fusion memory cache to: 8.0 GB
○ GPU Configuration
§ GPU Processing mode: Auto (checked) > Metal
§ GPU selection: Auto (checked)
§ Name: Apple M1
§ Memory: 10.7 GB
§ Type: Integrated
§ Details: Main Display GPU
• Decode Options
○ Use GPU for Blackmagic RAW decode (checked)
○ Decode h.264/H.265 using hardware acceleration (checked)
○ Use GPU for R3D: Debayer
• Video and Audio I/O
○ Video and Audio I/O
§ For playback use: UltraStudio HD Mini
§ For capture use: UltraStudio HD Mini
§ Audio interface: MADI
§ Audio Monitoring Delay: 0 ms
○ Speaker Setup
§ Speaker configuration: Manual
§ Monitor set: Main
§ Device: Mac mini Speakers
§ Monitor set format: Stereo
§ Stem > Left; Output > 1: Mac mini Speakers; Gain > 0.0
§ Stem > Right; Output > 2: Mac mini Speakers; Gain > 0.0
○ External Monitor Source Setup
§ Monitor circuit: Control room
§ Additional monitor source: None
• General Preferences
○ Audio processing block size: Auto
○ (Everything below unchecked, except for Automatically check for updates)
○ LUT Locations > none added

Project Settings
• Master Settings
○ Timeline Format
§ Timeline resolution: 720 x 486 NTSC
□ For 720 x 486 processing
§ Pixel aspect ratio: Square
□ 4:3 standard definition
§ Timeline frame rate: 29.97 frames per second
§ Playback frame rate: 29.97 frames per second
○ Video Monitoring
§ Video format: NTSC
§ SDI configuration: Single link
§ Data levels: Video
§ Video bit depth: 8 bit
§ Monitor scaling: Bilinear
○ Optimized Media and Render Cache
§ Proxy media resolution: Choose automatically
§ Proxy media format: H.265
§ Optimized media resolution: Choose automatically
§ Optimized media format: ProRes 422 Proxy
§ Render cache format: ProRes 422 Proxy
□ Enable background caching after 5 seconds (checked > default setting)
○ Frame Interpolation (Default)
§ Retime process: Nearest
§ Motion estimation mode: Standard Faster
§ Motion range: Medium
• Capture and Playback
○ Deck Settings
§ Video capture and playback: NTSC
§ Video connection operates as > (unchecked)
§ SDI configuration: Single link
§ Data levels: Video
§ Video bit depth: 10 bit
§ Use deck autoedit (checked)
§ Non auto edit timing: 0 frames (default)
§ Deck preroll: 2 seconds
§ Video output sync source: Auto
○ Capture
§ Capture: Video and audio
§ Video format: QuickTime
§ Codec: Uncompressed YUV 422 8-bit
○ Playout
§ Output: Video and audio
Fairlight (default settings)
Used fixed bus mapping (unchecked)

[Peter Chamberlain]

Moved to Resolve forum