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Signal Flow: Butler Studio B (Room 50)

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Ian Anderson

on 27 July 2013

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Transcript of Signal Flow: Butler Studio B (Room 50)

Signal Flow and Routing in
Butler Studio B - Room 50:

The Channel Path:
Everything Before the Recorder

Channel Path
Recorder: Pro Tools
Monitor Path
From transducer to recorder inputs, there are a number of possible paths for the input signal, depending on the type of signal source. We'll focus on routing a microphone into Pro Tools.
Microphone Level
Option 1
Pro Tools: The Audio "Storage Device"
Pro Tools HD is a Digital Audio Workstation used as an audio recording, editing and playback device. A Pro Tools HD system comprises the following component elements:
The Monitor Path:
Everything After the Recorder

Everything from the recorder's outputs to the listener's ears, with several amplitude controls along the way:
Patchbay: From Pro Tools
Trident Console
Using the Trident's on-board mic preamplifier
Trident Console
No patching required at control room patchbay!
Mic preamplifiers might not be as high a quality as outboard mic preamplifier.
Room 50
Tracking Room
Room 50
Control Room
Line Level
Line Level
Option 2
The "Home Run:"
Using an Outboard Mic Pre
Outboard Mic Preamplifier
Patchbay: To Pro Tools
Room 50 Tracking Patch Panel
Room 50 Control Room Patchbay
TT - Mic Level
TT - Line Level
Focusrite ISA428
Room 50
Tracking Room
Room 50
Control Room
At a Glance: Features
Close Up: Controls
Four Channels of Focusrite ISA110 Mic Preamplifier.
Mic, Line and Instrument (DI) inputs on each channel.
Selectable input impedance on each channel.
Sweepable high-pass filter on each channel.
Insert send and return on each channel
24-bit, 192kHz A/D conversion with digital outputs.
Phantom Power Switch
Polarity Inversion
Insert Activation Switch
Level Trim:
Fine-tune output level with up to 20dB additional gain.
High Pass Filter
Activation Switch
Frequency Selector
Input Impedance Selection
Optional control - no single "right" setting!
Input Selector
Be sure to select the proper input!
Select "Mic" when using a microphone, etc.
Be sure to use if you're using a condenser microphone!
Instrument Input
Plug a bass or guitar in here to use the ISA428 as a DI.
Be sure to select "Inst" input at the input selector!
Gain Control
Up to 60dB gain for microphone and instrument inputs.
0-30dB of gain by default.
Use "30-60" gain range switch to add 30dB of gain.
Gain Range Switch
Engage to add 30dB of gain to mic and instrument-level signals.
XLR - Mic Level
Room 50 Tracking Patch Panel
Room 50 Control Room Patchbay
TT - Mic Level
XLR - Mic Level
Trident Microphone Preamplifier
Mic Gain
Up to 60dB gain
Phantom Power
Required for Condensor mics!
Engage BEFORE gain!
"Short Fader" and Direct Output
While it may not appear that the Trident has a "short fader" like the Audient, it does! It's a rotary fader instead of a linear fader:
Fader Flip Button
You MUST engage this button in order for the "MON" knob to function as the "short fader!"
MON Knob
Functions as a "short fader."
Controls level to inputs of Pro Tools 96io interface, via the Trident's direct output.
Analog to Digital (A/D) Conversion
Digital to Analog (D/A) Conversion
HD Cards, Storage and User Interface
Pro Tools Software
Patchbay: To Pro Tools
Mic Lines
from patch panel in tracking room
Trident Mic Pre Inputs
Studio mic lines are normalled to the Trident's mic pre inputs.
Mic lines are half normalled to the Trident's mic pre inputs!
Patch Point!
Patch Point!
(half normalled!)
Trident Direct Outputs
Signal's next stop after "MON" knob.
The first 16 channels' direct outputs are half normalled to Pro Tools' 16 inputs.
"DAW Track IN": Pro Tools Inputs
All 16 inputs of the 96 io are found here.
Any line-level signal can be patched into Pro Tools here.
TT - Line Level
Patch Point!
(half normalled!)
Patchbay Location
DAW Track In = Pro Tools Inputs
Patch any line-level signal directly into Pro Tools here!
Long Fader
Stereo Master Faders
Control Room/Monitors
Stereo Bus Assignment
Push to route signal from long fader to stereo master faders.
Long Fader
Primary volume control for monitor path.
Control Room Loudspeaker Volume
Stereo Master Faders
Place at unity gain (0)!
Main Monitor Selector
Selects Mackie HR824s for monitoring.
These are the only monitors we have, so make sure this button is pressed!
Line Level
DAW Tracks Out
Trident Tape Returns
Inputs to the Trident's Monitor Path
Pro Tools outputs.
Line Level
No patching necessary!
Record Enable Button
Remember to press this button to "arm" the track for recording!
Pressing this button passes audio through the computer to the Monitor Path.
Begin presentation for a quick-start mic patching tutorial using the Focusrite mic preamplifiers or...
Click, drag and zoom to explore Room 50!

(96 io)
(96 io)
Microphone Tie Lines
From tracking room patch panel.
When using external mic pre, patch FROM here!
Patch Point!
Patch Point!
ISA 428 Outputs
ISA 428 Inputs
Patch TO these inputs FROM mic tie lines!
Patch FROM these outputs TO "DAW Inputs."
Patch Point!
Shortest possible signal path.
Arguably better mic preamplifiers.
No fader or other attenuation between mic pre and Pro Tools inputs.
Input Module
I/P Flip
This switch routes the tape returns (Pro Tools outputs) to the long fader.
You MUST engage this switch to "mix" through the Trident's long faders!
Full transcript