Quote:
Originally Posted by 7Seas
Thank you all for your replies... 
The question for me boils down to using Avid HDN (PCI or thunderbolt), for lowering latencies.
From what I've read, there is no real life advantage in using this HW.
The RME PCIe interfaces I use are quick.
I cannot get RTL below 5/6ms.
I read somewhere that using Avid HW with PT HD would give me a 2ms RTL, regardless of the buffer size. It seemed strange, unless this only referred to HDX and using only DSP plugins, and still this seems strange. Can anyone enlighten me?
Right now, the DAD and Ravenna solution presented are viable, but expensive. My main goal is to reduce RTL maintaining my AES connected converters, that in my case are Forssell and Mytek, but can be any brand. I really don't like to be limited in choice by the interface, and that is what the trend is right now... 
Focusrite seem to offer a Dante solution that interfaces directly with Avid HW, but if Avid's own HW has 2ms latency then there is no point, except being able to compensate properly for HW inserts, am I right?
Z. |
First off - this is what HD Native does in the latency department with AVID converters
http://duc.avid.com/showthread.php?t=344994
You will have to tell us what the A/D and D/A times are for your Mytek or Forssell since I see no mention of this key spec in a quick look at their websites.
You will also have to tell us your sample rate and if you insist on being able to monitor through PT software and plugins or if a parallel 3rd party mixer is acceptable.
As far as possible A/D to AES to ProTools to AES to 3rd party D/A goes there are many possible configurations including HDX, HD Native and 3rd party. At 96kHz and 64buffer many of these can do ~2ms. For consistent less than this with no dependence on buffer you will need DSP which comes in many many forms.
Just to give one possible scenario
PT12 Vanilla
DiGiGrid IOC (16ch of AES in/out)
SoundGrid Server One (DSP engine)
Uses eMotion mixer or for just a few channels - StudioRack plugin in PT
0.8ms SoundGrid processing latency (at 44.1k or 96k) plus a a little for digital through the IOC (~0.2ms to 0.3ms) plus whatever your A/D D/A time is.