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#1
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Hey everyone,
What current digilink interfaces are sample accurate to 192s or HD I/O? Obviously Avid stuff. I assume the Symphony and new Aurora N continue Apogee and Lynx's trend of being sample accurate? Mytek? What about Burl, the Focusrite Red stuff and Antelope Audio HD interfaces?
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littledevilstudios.com.au Pro Tools Ultimate 2021.12. OSX 10.14.6. HDX2. DAD DX-32R. DADman 5.4.5.1. Mac Pro 2013. 10 Core 3.0gHz. 64Gb. Blackmagic Extreme HD. Sync HD. Dobly Mastering Suite 3.7. |
#2
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What does sample accurate mean?
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Justice C. Bigler Head Audio/A1 - Blue Man Group North American Tour www.justicebigler.com Lenovo P50: quad-core i7-6820hq, 64GB, 2TB SSD, Win 10 Pro / Protools vanilla 2021.7 2018 MacBook Pro: six-core i9, 32GB, 1TB, Catalina / HD|Native-TB / Protools Ultimate 2021.7, DAPS, L-ISA Studio Home/mobile: Focusrite Red 8Pre / Clarett 4Pre / DVS Road/hotel: Roland OctaCaputre / Apogee One |
#3
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HD Native & HDX have preconfigured delay compensation for Digidesign and HD I/O interfaces. When you throw an analogue insert into a mix, the resulting audio should still be sample accurate so that it doesn't cause phase issues with the rest of the mix - think parallel compression with a hardware compressor.
Lynx, for example, mimicked the roundtrip AD/DA latency of the Digidesign 192 with their Aurora's. So it was literally a drop-in replacement for 192's or HD I/Os.
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littledevilstudios.com.au Pro Tools Ultimate 2021.12. OSX 10.14.6. HDX2. DAD DX-32R. DADman 5.4.5.1. Mac Pro 2013. 10 Core 3.0gHz. 64Gb. Blackmagic Extreme HD. Sync HD. Dobly Mastering Suite 3.7. |
#4
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So what makes them sample accurate and how do you know if they are?
The Focusrite Red4/8Pre and 16 Line interfaces have a Loop Sync port, in addition to their word clock. ![]()
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Justice C. Bigler Head Audio/A1 - Blue Man Group North American Tour www.justicebigler.com Lenovo P50: quad-core i7-6820hq, 64GB, 2TB SSD, Win 10 Pro / Protools vanilla 2021.7 2018 MacBook Pro: six-core i9, 32GB, 1TB, Catalina / HD|Native-TB / Protools Ultimate 2021.7, DAPS, L-ISA Studio Home/mobile: Focusrite Red 8Pre / Clarett 4Pre / DVS Road/hotel: Roland OctaCaputre / Apogee One |
#5
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I'm running a Merging HORUS interface, and it has many io options, including AES, MADI, and of course Analogue AD/DA. When connected via DigiLink, you can tell it to emulate either HD-Madi, HD-io, or 192-io, which will show up in ProTools as the intended device, and also emulate sample-accurate io delays as well.
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#6
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If a digilink interface has an internal latency of 40 samples, then the audio that returns from your analogue insert will be 23 samples late (40-17=23). You can get it more accurate by fiddling with the I/O offset menu, but even then I think you are limited to an accurate of +/-3 samples because it uses a tenth of a millisecond as the smallest value. I don't actually have any idea what the latency of each device is, so take the figures with a grain of salt. They are just an example of how Pro Tools compensates for latency. Other DAWs use a ping feature to quickly obtain sample accurate inserts. Pro Tools doesn't... finding a digilink interface that mimics the internal latency of an Avid interface is the quickest way to deal with it. I assume you can test your interface by doing the I/O Offset measurement outlined in the Pro Tools manual. If you are running a HD rig, a result of 0 samples would probably mean you have an interface that is sample accurate to HD I/O (or whatever the device is that appears in your hardware settings).
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littledevilstudios.com.au Pro Tools Ultimate 2021.12. OSX 10.14.6. HDX2. DAD DX-32R. DADman 5.4.5.1. Mac Pro 2013. 10 Core 3.0gHz. 64Gb. Blackmagic Extreme HD. Sync HD. Dobly Mastering Suite 3.7. |
#7
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Jeepers! That is the way to do it, and great to know.
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littledevilstudios.com.au Pro Tools Ultimate 2021.12. OSX 10.14.6. HDX2. DAD DX-32R. DADman 5.4.5.1. Mac Pro 2013. 10 Core 3.0gHz. 64Gb. Blackmagic Extreme HD. Sync HD. Dobly Mastering Suite 3.7. |
#8
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It's just a matter of knowing how many samples to compensate (i/o setup); for example, Apogee manuals have charts available -- but sure, it would be easier if someone else did it for you
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Janne What we do in life, echoes in eternity. |
#9
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Sure, but that is the equivalent of turning my $6000 HDX system into a $100 Coreaudio interface. Pro Tools HDX by design takes care of it automatically. I just want to know what third party digilink interfaces and their manufacturers have the foresight to maintain the integrity of HDX, in this regard. The I/O Offset menu was truly sucky in 2010. It's even worse in 2019. I just don't want to have to deal with millisecond offsets and their ever so slightly less-than-perfect maths on an expensive DAW... particularly when DAWs like Reaper, Cubase and Ableton Live can all deal with it quickly and efficiently. I haven't used Apogee interfaces since the 16X series. I know you needed to enter manual offsets then. Is it still the case with the Symphony and Symphony MKII?
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littledevilstudios.com.au Pro Tools Ultimate 2021.12. OSX 10.14.6. HDX2. DAD DX-32R. DADman 5.4.5.1. Mac Pro 2013. 10 Core 3.0gHz. 64Gb. Blackmagic Extreme HD. Sync HD. Dobly Mastering Suite 3.7. |
#10
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(and having that compensation being correct when changing session sample rates.) Not the same thing.
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Pro Tools Ult 2022.6, HDX 3, MTRX/SPQ, HD Omni • S1 x 2, FireHD x 2, Dock, iPad • Mac Pro 5,1 - 3.06 GHz 12 core - macOS 10.13.6 • RAM 64GB, SSD 4 x 2TB, GPU GTX 980 4GB |
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