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BUILD A LIVE DIGITAL MIXING CONSOLE - PART 2: THE FUTURE OF LIVE MIXING - MODULAR!

12/23/2015

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A picture of the Wright brothers in their bicycle shop
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They were told that if man was meant to fly, he'd be born with wings. Evidently they wanted to push beyond the criticism and innovate - trading their bike tires for wings!

HERE COMES THE NAYSAYERS - "BLAH, BLAH, LATENCY, BLAH"

So what about latency?  Let's talk about this. 

In a nutshell, latency is the delay you get when you play an instrument, it hits the A/D converter, then goes into the DAW and is processed, and then goes back out of the interface via the D/A converter.  Kind of like if you've ever been on a phone call, and for whatever reason, you hear your voice come back loud and clear a second later. 

Talk about throw you off!  "Let me call you back."

This used to be an issue just a few short years ago, but technology has progressed to the point where latency doesn't have to be an issue anymore in recording or live mixing.

Earlier today I was speaking with a representative from MOTU.  We were both speaking about interfaces and such, and the topic of live mixing with a DAW came up.  He said "we believe this will be the future of live mixing, and our MOTU AVB interfaces reflect this philosophy."  I of course, couldn't agree more.
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This is a picture of the MOTU AVB on-board interface patching and mixing app controllable via a Mac or Windows browser. This is connected with an RJ-45 terminated CAT5/CAT6 cable.
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Well lookie here, here's their AVB series "Stage-B16" unit that directly interfaces with most major DAWS. Hmmm. I wonder why they used the word "Stage" for this interface?
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Hmmm. That looks familiar. You mean you can control all of your inputs and outputs via a Mac or Windows OS browser on the interface? Well that's pretty neat.
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And here's their Monitor 8 unit from the same series. Yes, you can run headphones as well as live PA (designed for this).

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RME has gotten in the game as well with their recording interfaces featuring an on-board mixing suite as well as a full routing feature set. Monitor console anyone?
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Focusrite has some really rock-solid affordable interfaces called the Saffire series. They too have their own mixing suite built into their recording interfaces. Look at the top tabs. You can create custom monitor/headphone mixes for each person recording/performing.

So how does this all relate to latency and building your own modular live digital mixing console?  With on-board DSP, any of these interfaces have what is called in the industry, "zero latency monitoring."  This is because as soon as the signals from the assorted instruments come into the interface, they are routed right back out of the interface without being processed by the computer.  Routing, levels, and even effects can be applied all within the interface using no RAM from the actual host computer. 

Focusrite interfaces can do this in 1ms or less (which is imperceptible to the human ear).  The MOTU AVB series reportedly does it in about .66ms.  That's extremely fast. 
No more will you have latency issues in monitoring anymore.  Once this feature came out in affordable interfaces, it has opened up the door for DIY modular live digital mixing consoles.

What's even cooler, is that if your church or facility already has in-ear monitoring, you are actually one step closer to having a killer modular live digital mixing console that is equally powerful (if not MORE so), then most live digital mixing consoles out there for a fraction of the price.


Stay tuned for Part 3 as we discuss potential latency issues mixing FOH, using your favorite plugins, building the right computer, etc.
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Here we have a lovely SD9. Great console. The general parts of it sound familiar huh?

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  • Home
  • What's New
  • The Basics of Sound
    • The Nature of Sound
    • Acoustics
    • Microphones
    • Loudspeakers >
      • Loudspeakers - Continued
    • Amplification
    • Understanding Alternating Current
    • Circuit Values
    • Amplifier Arrangements
    • Transistors
    • Interstage Coupling
    • Noise
    • Distortion Effects
    • Using an Oscilloscope
    • Frequency Response
    • Power Amplification
    • Phase Splitting Circuits
    • Audio Transformers
    • Distortion
    • Shielding
    • Cabling
    • Electro-Acoustics
    • Audio & Hearing
  • Microphone Types
  • Mic Placement
  • Gain Structure
  • Demystifying The Mixing Console
  • Equalization
  • Compression
  • The Ins & outs
  • The Sub Bus
  • The Voicing Concept
  • Reverb
  • Good Habits
  • Psychoacoustics
  • Stage Isolation & Drum Booths
  • System Feedback
  • System Noise & Hum
  • Electronic Repair
  • Speakers
  • Tips & Tricks
  • Noise Gates
  • Mixing 101 & Beyond
  • DIY Projects
  • Digital Audio Basics
  • Stage Lighting
    • Lighting Basics
    • Brightness
    • Color
    • Controls
    • Smoke
  • Books
    • Yamaha Sound Reinforcement Handbook
    • Sound Recording & Production
    • The Art of Record Production
    • Recording & Production of Sound
    • BBC - Microphones
    • Microphones - 3rd Edition
    • How To Build A Small Studio
    • Acoustic Techniques for Home & Studio
  • The Blog
  • References Page