Responsalyzer

The Responsalyzer is used to measure the system response. This can be in any venue, or the response of components in a Q-SYS design.

There is a limit of four Responsalyzers in a design.

There are two inputs to the Responsalyzer, and no outputs:

Measurement - This is usually a microphone placed somewhere in the venue, or the output of one or a series of components in a Q-SYS design.
Reference - This is a constant input containing all the frequencies of the audio band (20 Hz to 20 kHz), usually white or pink noise. The Reference signal is not used for RTA measurements.

Properties

Property	Function	Choices
RTA Bandwidth	Sets the bandwidth for the RTA measurements. The default is 1/12 Octave. This sets the resolution logarithmically and should be adjusted along with the FFT size.	1 Octave 1/3 Octave 1/6 Octave 1/12 Octave 1/24 Octave
FFT Size	Sets the resolution and response of the RTA measurements linearly. The larger the FFT bin, the slower the response with greater resolution. A smaller FFT bin size gives faster response with less resolution.	512 1024 2048 4096 8192 16384 (Default) 32768 65536
Time Constant Controls	Enable or disable the RTA Time Constant and Response Time Constant controls.	No / Yes

Property

Function

Choices

RTA Bandwidth

Sets the bandwidth for the RTA measurements. The default is 1/12 Octave.

This sets the resolution logarithmically and should be adjusted along with the FFT size.

1 Octave

1/3 Octave

1/6 Octave

1/12 Octave

1/24 Octave

FFT Size

Sets the resolution and response of the RTA measurements linearly.

The larger the FFT bin, the slower the response with greater resolution. A smaller FFT bin size gives faster response with less resolution.

512

1024

2048

4096

8192

16384 (Default)

32768

65536

Time Constant Controls

Enable or disable the RTA Time Constant and Response Time Constant controls.

No / Yes

Controls

There are two inputs to the Responsalyzer: Measurement, and Reference.

Control	Function	Default / Range
Measurement
Gain Bypass	Bypasses the Measurement Gain control when engaged.	Default = no Range = no / bypassed
Gain (dB)	Sets the Gain for the Measurement input signal.	Default = 0 Range = -100 to +100
Reference
Delay Bypass	Bypasses the Reference Delay when engaged.	Default = no Range = no / bypassed
Auto Set Delay	This trigger button sets the delay based on the conditions when the button was clicked	N / A
Delay (ms / seconds)	Manually sets the delay of the Reference signal.	Default = 0 Range = 0 to 1.50 seconds
Response
Response Graph	The scales for the Response Graph vary depending on the measurement method you select, see below. When the X axis is frequency, the horizontal movement of the vertical crosshair cursor snaps to the bandwidth setting in the Responsalyzer Properties, 1 octave, 1/3 octave, and so on. The vertical movement of the horizontal crosshair follows the magnitude or amplitude of the signal at the point of intersection with the vertical crosshair. There are 10 octaves spanning the audio frequency range. The frequency is doubled (or halved) for each octave. When Mag or Mag/Phase is selected, there is an orange line visible at the top of the graph. This line represents the Coherence of the Measurement signal compared to the Reference signal. The range is zero (at the bottom of the graph) to one at the top of the graph. Any coherence signal below 50% should be considered not usable.	N / A
Magnitude	Measures the magnitude of the Measurement input signal compared to the Reference Input signal over the audio frequency range. The green line is the Measurement Input signal. Requires a Reference Input, typically the same source as the Measurement Input but prior to any EQ other DSP.	X Axis = 20Hz to 20kHz Y Axis Left = -20dB to 20 dB
Magnitude / Phase	Same as the Magnitude selection but with the addition of a phase line (magenta) to compare the phase of the Measurement Input to the Reference Input. When both lines are the same across the frequency range, the phase is the same. Requires a Reference Input, typically the same source as the Measurement Input but prior to any EQ other DSP.	X Axis = 20Hz to 20kHz Y Axis Left, Gain = -20dB to 20 dB Y Axis Right, Phase = -180° to 180°
Impulse	Measures the time difference of the energy pulse of the Measurement Input compared to the Reference Input. The Reference Input is at 0.0 on the X axis (not shown), and the Measurement Input pulse is displayed at the point on the X axis representing the time difference. The Y axis displays the amplitude of the Measurement Input. Requires a Reference Input, typically the same source as the Measurement Input but prior to any EQ other DSP.	X Axis = (variable) 0.0 ms to (10.7 ms up to 341.3 ms) Y Axis Left = -1.0 to 1.0
	These two buttons display when Impulse is selected. Click the plus button to zoom in to display a range of 0 to 10.7 ms, and the – button to zoom out to display a range of 0.0 to 341.3 ms.
RTA	Measures the Measurement Input signal's magnitude over the audio frequency range. The RTA function does not use a Reference Signal.	X Axis = 20Hz to 20kHz Y Axis = -80 dB to 20dB
Averaging
RTA Time Constant	Available only when Properties > Time Constant Controls is set to 'Yes'. Controls how quickly the RTA graph responds to changes in the signal.	Default = 40.0ms Range = 40.0ms to 10.0s
Response Time Constant	Available only when Properties > Time Constant Controls is set to 'Yes'. Controls how quickly the Magnitude, Magnitude/Phase, and Impulse graphs respond to changes in the signal.	Default = 400ms Range = 400ms to 10.0s

Control Pins

Pin Name	Value	String	Position	Pins Available
Auto Set Delay	Trigger			Input / Output
Clear ¹	Trigger			Input / Output
Coherence	This control pin is a vector type output for use with a Control Script.			Output
Delay Bypass	0 1	no bypassed	0 1	Input / Output
Frequencies	This control pin is a vector type output for use with a Control Script.			Output
Gain Bypass	0 1	no bypassed	0 1	Input / Output
Impulse Response	This control pin is a vector type output for use with a Control Script.			Output
Impulse Response Length	This control pin is a vector type output for use with a Control Script.			Output
Magnitude Response	This control pin is a vector type output for use with a Control Script.			Output
Measurement Gain	-100 to 100	-100dB to 100dB	0 to 1.00	Input / Output
Phase Response	This control pin is a vector type output for use with a Control Script.			Output
Reference Delay	0 to 1.50	0ms to 1.5s	0 to 1.00	Input / Output
Response Averaging Time Constant	400 to 10	400ms to 10.0s	0 to 1.00	Input / Output
RTA	This control pin is a vector type output for use with a Control Script.			Output
RTA Averaging Time Constant	40.0 to 10	40.0ms to 10.0s	0 to 1.00	Input / Output
Short Impulse Response	This control pin is a vector type output for use with a Control Script.			Output
Update	This control pin is a vector type output for use with a Control Script.			Output
1. The Clear trigger is used to clear the graph when you change or mute the input.

Responsalyzer

1. The Clear trigger is used to clear the graph when you change or mute the input.