Wed Mar 10, 2021 9:11 am
OK, so this is how I get reliable multichannel (5.1/7.1) sound out of Resolve to my prosumer audio interface. In this setup, everything in Windows uses the default stereo audio device, MOTU Main 1-2, EXCEPT Resolve. I use VoiceMeeter (VM) ONLY to allow Resolve to talk to the MOTU for multichannel sound playback. However, you can use it as your default audio device and as your system mixer (it’s pretty cool), but setting it up for only Resolve keeps it out of the way otherwise. YMMV.
My system:
Win10 Pro 64
HP Z820 16 core, 32 GB
Resolve 17 Studio
MOTU Ultralite mk3 Hybrid (via FW), no EQ, Dynamics in CueMixFX (to minimize latency)
Step 0: Set your MOTU Sample Rate and Buffer Size
From the Start Menu, run MOTU Audio Console and set the Sample Rate to 48,000 and the Buffer Size to 64. Click OK. Close the program. Note: I've found this program to be flaky, and only seems to start just after a reboot. Once you start messing with sound on your system, it won't run.
Step 1: Download and Install VoiceMeter (the PLAIN one, NOT Banana, or Potato)
I initially chose the most feature-rich version, Potato, but realized that I could do everything I needed with the Plain version, and the additional features MAY add latency. Just run the installer, it’s fast, and will REQUIRE a reboot.
Step 2: Set up your new device in Windows
Right-click on the speaker icon in the task bar and select SOUNDS. In that dialog, on the PLAYBACK tab, scroll to find VoiceMeeter Input, select it and click CONFIGURE. Choose 5.1 Surround (or 7.1), and click Next and check everything that’s setable. Click FINISH, then Click OK to dismiss the SOUND dialog. This step is IMPORTANT since it’s what tells Windows that there are 6 (8) channels to present to Resolve. If you miss this step, you only get TWO, the default.
Step 3: Set your Windows Sound preferences
Again, right-click on the speaker icon in the task bar and select OPEN SOUND SETTINGS. In the dialog, under ADVANCED SOUND OPTIONS, click on App Volume and Device Preferences. On that screen, select
MOTU Main Out for OUTPUT, then select MOTU Analog for INPUT. Below that you will see System Sounds followed by a changing list of apps you have recently run or are currently running. They all should say DEFAULT. NOTE: if you hit Reset at the bottom by accident, you will have to go back into Sounds and set up your VM speaker again, I think. Close that dialog.
Step 4: Set up VoiceMeeter
Run VoiceMeeter from the Start Menu (you’ll find it under VB Audio). At top right you will notice a red flashing message that says something like “Set A1”. Click on the A1 button just to the left and select ASIO: MOTU Audio ASIO. Click the Menu button at the top right and check the following: Auto Restart Audio Engine (A1 Device), Run On Windows Startup, and System Tray. Close VM. You should see its ICON in the system tray. Just click it to bring it back up whenever needed.
Step 5: Set up Virtual Cable
To be honest, I’m not completely sure where this fits into the mix, but it contains a critical setting that will determine how successful you are. Run Virtual IO Control Panel under VB Audio from the Start Menu. On the Virtual Cable window, enter 1200 in the box just right of Latency in the top left corner and press enter. Leave this program open, as you might have to bump this value up if you find your sound has drops in it. You want to experiment with this so it is as LOW AS POSSIBLE and still have true sound. 1200 smp was the lowest I could get away with on my system. NOW, go back to VoiceMeeter, and press the Menu button and select Restart Audio Engine to accept your changes in Virtual Cable. In VoiceMeeter, under Virtual Input top center, you should see VB-Audio Voicemeeter VAIO, under which you should see 48000Hz – 1200, values that come from Virtual Cable.
Step 6: Launch Resolve
Click the DaVinci Resolve menu and select Preferences. In Preferences (System), select Video and Audio I/O on the left. On the right, under Speaker Setup, in Speaker Configuration , select MANUAL. Click on the Rename button just right of Monitor Set and enter “Stereo Direct”. In the Device dropdown, choose MOTU Main Out, and set Stereo as the Monitor Set Format just below that. Below that, you’ll see two entries, for Left and Right. In Left, select 1. MOTU Main Out, and for Right select 2. MOTU Main Out. Now, go back to Monitor Set, click the dropdown and select the second option in the list (it doesn’t matter what it is). Click the Rename button again and enter “5.1 VM VAIO”. In the Device dropdown select VoiceMeeter Input. In Monitor Set Format, select 5.1. Below that (if it doesn’t fill it in automatically), set Left to 1. VoiceMeeter Input, Right to 2. VoiceMeeter Input, Center to 3…, and so on. This is the standard DCP track layout. Click SAVE to save your preferences. You’ll need to restart Resolve.
Step 7: Test
On the Fairlight Page, at the top right of the timeline panel, where the DIM button is, there is a little dropdown labeled Main 1 >. If you click that, you will be able to switch where to send output to either of your newly created monitor sets (outputs), either Stereo DIRECT to the the MOTU bypassing VoiceMeeter altogether. If you choose the 5.1 VM VAIO option, Resolve will now send 6 channel output to the VM virtual interface, which will forward it on to the MOTU via ASIO. You can play Stereo to this as well. Do some testing with both 5.1 and Stereo tracks, preferably with video so you can check sync. If the sound is clear without artifacts, and the video is in sync, you are good to go. If you hear your sound dropping out, you’ll need to go back to Virtual Cable and increase that Latency value. You can choose something from the menu, or enter a value yourself in smaller increments by clicking on the box directly. If you still can’t get it to work, you may have to go back to the MOTU Audio Console and increase buffer size there, but do that last. The more you increase either of these values, the more latency you will introduce and the more out of sync your video/sound will become. Find the balance.
Other Things to Keep in Mind:
* You should try to make all your Sampling Rates the same all the way through the system for minimal latency. The Virtual Cable manual has a section on latency issues and what to look out for if you need it.
* Also, click Menu top right in VoiceMeeter and select System Settings / Options. This brings up a gnarly box with a lot of info, but what’s important to you is that black text in the center. It should say SR: 48000 Hz buf: 64. THESE are the values you entered into the MOTU Audio Console.
* When using the 5.1 VM VAIO speaker set in Resolve, you will have to control volume via Resolve or the MOTU master volume. The windows controls (other than MUTE) have not effect. It is expected that you will use VM as your ‘mixer’. However, when using the Stereo Direct speaker set, you are, in fact, using the Windows Default speaker and all of your usual volume controls work as expected for sound coming from Resolve.
Good luck, and let me know how you get on.
Shane Taylor
Owner, Ion Drift Productions
www.iondriftproductions.com
Resolve Studio V19.1.2B3 Activation Key
Windows 10 Pro x64
HP Z820, 16 core
32 GB RAM
RTX 2080Ti 11GB
26 TB Storage
OS & Cache on SSD
MOTU Ultralite MK3 Audio Interface