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Dante virtual soundcard ASIO audio is late
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Joined: 10/12/2022(UTC) Posts: 3  Location: Amsterdam
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When using Dante Virtual Soundcard in ASIO mode audio seems to be late to video.
I'm used to video being late and delaying audio but now the inverse is happening.
Any idea how to get the latency lower? I don't really want to delay the video as this is extremely resource-intensive.
Cheers,
Daniel
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Rank: Advanced Member
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Joined: 11/23/2020(UTC) Posts: 106  Location: Wichita Thanks: 8 times
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Originally Posted by: daniellippens  When using Dante Virtual Soundcard in ASIO mode audio seems to be late to video.
I'm used to video being late and delaying audio but now the inverse is happening.
Any idea how to get the latency lower? I don't really want to delay the video as this is extremely resource-intensive.
Cheers,
Daniel Are you sure it's in ASIO mode and not running through WDM drivers? Also if resources are a restriction, are you running at high CPU usage? Virtual Soundcard means it's running IN the CPU so if you were close to the edge already this may be a problem. Lastly you should check your network speed under load, how long does it take to round-trip a ping to the equipment sending the sound?
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Rank: Newbie
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Joined: 10/12/2022(UTC) Posts: 3 Location: Amsterdam
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Yes the DVS is definitely running in ASIO mode. CPU usage is low. I’m not running close to the edge but i just don’t feel like delaying video.
Round trip times are under 1ms. Audio gear is on the same switch.
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Rank: Newbie
Groups: Registered
Joined: 10/12/2022(UTC) Posts: 3 Location: Amsterdam
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I'd like to bump this topic as no matter what i do and no matter on what machine i run vMix with DVS audio is always late by a few frames. It happens in DVS ASIO but also in DVS WDM. I've tried everything on the Dante side to get latency down as low as possible but i feel like vMix is introducing latency to my audio coming in over Dante.
Setting a negative audio delay in vMix doesn't seem to do anything.
I'm really hoping someone has figured this out.
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Rank: Advanced Member
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Joined: 4/23/2017(UTC) Posts: 1,072  Location: Germany Thanks: 3 times
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Just some basics worth checking.
- Clocks, sync everything to NTP if possible and check they are all on the same time. Dante relies heavily on clocks
- Check ASIO buffer size and Delay settings in DVS
- enable IGMP snooping on the switch, set the IGMP querrier to a central unit
- disable any green or eco modes on the switch
- Check the VLAN config, check if you have VLAN bridging that could mean a detour for packets.
- When working wit VLANs check that the MTU is reduced to avoid repacketizing at switch port level
Hope that helps to check the basics
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