Difference between revisions of "Simple Configuration"

From IVS Wiki
Jump to: navigation, search
(→‎Tesira Software)
 
(31 intermediate revisions by the same user not shown)
Line 1: Line 1:
 
=Description/Objective=
 
=Description/Objective=
−
In this example, we will be connecting one microphone to one camera and using the Tesira Forte DSP to reduce the amount of white noise.
+
In this example, we will be connecting one microphone to one camera and using the Tesira Forte DSP to reduce the amount of white noise.  
  
−
=Instructions/Example=
+
=Physical Wiring/Line Diagram=
−
We can really use whichever inputs and outputs we’d like, so let’s use input 1 and output 1 to keep things simple. When we terminate our cables, the mic will go into Orange Input 1 and the audio line to the camera will go into Black Output 1.  
+
To keep things simple, use input 1 and output 1. When terminating the cables, the mic will go into Orange Input 1 and the audio line to the camera will go into Black Output 1.  
−
==Line Diagram==
 
−
#: [[File:Simple_Config_Line_Diagram_2.png|500px]]
 
  
−
# Once you've completed your physical connections, open the Tesira software and start building your configuration.
+
{{img | file = Simple_Config_Line_Diagram_2.png | width=500px}}
−
# In this configuration we'll be using the following blocks. Add these blocks to your configuration:  
+
 
 +
=Tesira Software=
 +
 
 +
==Connections==
 +
# If the physical connections are complete, open the Tesira software and start building a configuration.  
 +
# In this configuration use the following blocks:  
 
#* TesiraFORTE CI block
 
#* TesiraFORTE CI block
−
#* Peak Meter x 2
+
#* Peak Meter x 3
−
#* Matrix Mixer with at least 1 input and 1 output, with one extra output
+
#* Matrix Mixer with at least 1 input and 1 output, with one additional output for AEC monitoring
 +
#* Uber Filter with as many as 6 filters
 +
#* Compressor with "ganged mode" and "advanced curve"
 +
#* Level block
 
#Connect the blocks as follows:  
 
#Connect the blocks as follows:  
−
#* The Tesira Input block will already be connected to the AEC block, so just add the first peak meter after the Input block.  
+
#* The Tesira Input block will already be connected to the AEC block, so connect the first peak meter to the Input block also. This will help ensure proper levels are set on the preamp. More on that in a minute.  
−
#* Connect the AEC block to the Matrix Mixer.  
+
#* Connect the AEC block to the Uber Filter, then the Filter to the Level Block.
−
#* Connect output 1 from the mixer to port 1 on the Tesira Output block and to the second peak meter, and our extra output from the Matrix Mixer to the AEC reference.  
+
#* Connect the Level Block to the Compressor and the second Peak Meter.
 +
#* Connect the Compressor to the Matrix Mixer.  
 +
#* Connect output 1 from the mixer to port 1 on the Tesira Output block AND to the third peak meter. This will ensure the right audio levels are sent to the camera.
 +
#* Connect the extra output from the Matrix Mixer to the AEC reference. The Automatic Echo Cancellation feature will not be used in this example.
 +
#:'''Note:''' The AEC reference block cannot be deleted from the configuration. It also will not compile the configuration if any blocks are not connected (including the AEC reference block.)  Do not send any audio to this channel.
 +
 
 +
 
 +
 
 +
When this is complete, the file should look something like this:
 +
 
 +
{{img | file = One_Complex_Blocks.png}}
 +
 
 +
==Processing Blocks in Tesira==
 +
 
 +
This section will provide further thought process behind each processing block, and how to adjust settings.  
  
 +
{{img | file = One Simple Blocks.png}}
  
−
When you're complete, your file should look something like this:  
+
#Input Preamp: STM-1’s will not be used to power the mics – the Forte will provide phantom power. Enable it here for each mic. The gain control on the input block is our preamp. For MX202’s the preamp will usually end up being between 42-48 dB. The purpose of a preamp is to boost the audio signal without added noise, so this setting is important. The goal is for the level of normal speech to show up at or around 0 dB on the peak meter.
 +
#First Peak Meter: This will help set the input gain to the proper level. As a default though, it will give us an instantaneous reading, which is much too fast for the human eye. Select a time between 250-500 milliseconds and enable the Hold button. When testing our input gain, aim to be peaking around 0dB, “kissing” the yellow. Loud noises such as a door slamming should peak way in the yellow, but not clip the input (not surpass the red section of the meter.)
 +
#AEC Block: This block does all the processing for noise reduction in the Forte. If using AEC in our solution, activate the AEC button here. This block also includes general noise reduction capabilities (the Noise Reduction setting). Medium is usually the best option for a room mic.
 +
#Matrix mixer: This is how to control where to send the audio signal of the mic(s). On the left the mixer shows the inputs, and on the top it displays the outputs. In this example, since there is only one mic and sending it to one camera, simply enable the matrix box corresponding to input 1 and output 1.
 +
#Second Peak Meter: Press Enable Hold again on the peak meter at the end of our chain. If no other processing was done, the levels of the peak meters should match. When using more complex solutions, this will help verify the levels and verify that the mixer is configured properly.
 +
#* Something to note about the Tesira audio is this: There is an 18 dB difference between the Tesira output block and the Axis camera. It will likely be necessary to raise the output level of the Tesira between 12-18 dB to achieve optimal levels in the Axis camera(s).
  
−
[[File:One_Simple_Config.png]]
+
==EQ and Compression==
  
 +
For information on EQ settings, click the image below:
  
−
#Here we’ve added a peak meter right after the input block. This will help us to be sure we have the proper levels set on the preamp. More on that in a minute.
+
{{img | file = EQ_Page.png}}
−
#In (almost) any configuration that does not include a control room push to talk microphone, we will not need to activate the Automatic Echo Cancellation feature. However, Tesira will not allow us to delete the AEC reference block for some reason. It also will not compile the configuration if any blocks are not connected (including the AEC reference block.) So, I’d recommend creating an extra output on the matrix mixer, so we can be sure we don’t send any actual audio to the AEC.
 
−
#Here we have a peak meter at the end of our signal chain to make sure we reach the right audio levels before we send it to the camera. The more features we use, and the more processing blocks we add, the more we need to pay attention to our “gain structure”, or the audio levels from one block to the next.  
 
  
  
−
===Configuration Blocks===
 
  
−
[[File:One Simple Blocks.png]]
+
For Compression parameters, click the image below:  
  
−
#We will not use STM-1’s to power the mics – the Forte will provide phantom power. Enable it here for all our mics. The gain control on the input block is our preamp. I find for MX202’s the preamp will usually end up being between 42-48 dB. A preamp is what allows us to boost the audio signal without added noise, so this setting is important. Our goal is for the level of normal speech to show up at or around 0 dB on the peak meter, or “kissing the yellow”.
+
{{img | file = Compression_Page.png}}
−
#The peak meter will help us adjust our input gain. As a default though, it will give us an instantaneous reading, which is much too fast to be helpful to us. Select a time between 250-500 milliseconds and enable the Hold button. When we are testing our input gain, we should aim to be peaking around 0dB, “kissing” the yellow. Loud noises such as a door slamming should peak way in the yellow, but not clip the input (surpass the red section of the meter.)
 
−
#The AEC Block does all the processing for noise reduction in the Forte. If we were going to use AEC in our solution, we would activate the AEC button here. Regardless of the AEC, and even from the Beamtracking microphone, this block also includes noise reduction capabilities. What it does is to lower the volume of constant noise in the room (i.e. the low rumble of HVAC in the ceiling, or the hiss of white noise in the room.) I find that Medium is usually the best option for a room mic.
 
−
#Our matrix mixer is how we decide where to send the audio signal of the mic(s). On the left the mixer shows the inputs, and on the top it displays the outputs. In this example, since we have one mic and sending it to one camera, we simply enable the matrix box corresponding to input 1 and output 1.
 
−
#Press Enable Hold again on the peak meter at the end of our chain. Since we did not use any processing in this example, the levels of the peak meters should match. When we have more complex solutions, this will help us verify our levels and verify that we have configured the mixer properly.
 

Latest revision as of 10:08, 10 May 2022

Description/Objective

In this example, we will be connecting one microphone to one camera and using the Tesira Forte DSP to reduce the amount of white noise.

Physical Wiring/Line Diagram

To keep things simple, use input 1 and output 1. When terminating the cables, the mic will go into Orange Input 1 and the audio line to the camera will go into Black Output 1.

Simple Config Line Diagram 2.png

Tesira Software

Connections

  1. If the physical connections are complete, open the Tesira software and start building a configuration.
  2. In this configuration use the following blocks:
    • TesiraFORTE CI block
    • Peak Meter x 3
    • Matrix Mixer with at least 1 input and 1 output, with one additional output for AEC monitoring
    • Uber Filter with as many as 6 filters
    • Compressor with "ganged mode" and "advanced curve"
    • Level block
  3. Connect the blocks as follows:
    • The Tesira Input block will already be connected to the AEC block, so connect the first peak meter to the Input block also. This will help ensure proper levels are set on the preamp. More on that in a minute.
    • Connect the AEC block to the Uber Filter, then the Filter to the Level Block.
    • Connect the Level Block to the Compressor and the second Peak Meter.
    • Connect the Compressor to the Matrix Mixer.
    • Connect output 1 from the mixer to port 1 on the Tesira Output block AND to the third peak meter. This will ensure the right audio levels are sent to the camera.
    • Connect the extra output from the Matrix Mixer to the AEC reference. The Automatic Echo Cancellation feature will not be used in this example.
    Note: The AEC reference block cannot be deleted from the configuration. It also will not compile the configuration if any blocks are not connected (including the AEC reference block.) Do not send any audio to this channel.


When this is complete, the file should look something like this:

One Complex Blocks.png

Processing Blocks in Tesira

This section will provide further thought process behind each processing block, and how to adjust settings.

One Simple Blocks.png

  1. Input Preamp: STM-1’s will not be used to power the mics – the Forte will provide phantom power. Enable it here for each mic. The gain control on the input block is our preamp. For MX202’s the preamp will usually end up being between 42-48 dB. The purpose of a preamp is to boost the audio signal without added noise, so this setting is important. The goal is for the level of normal speech to show up at or around 0 dB on the peak meter.
  2. First Peak Meter: This will help set the input gain to the proper level. As a default though, it will give us an instantaneous reading, which is much too fast for the human eye. Select a time between 250-500 milliseconds and enable the Hold button. When testing our input gain, aim to be peaking around 0dB, “kissing” the yellow. Loud noises such as a door slamming should peak way in the yellow, but not clip the input (not surpass the red section of the meter.)
  3. AEC Block: This block does all the processing for noise reduction in the Forte. If using AEC in our solution, activate the AEC button here. This block also includes general noise reduction capabilities (the Noise Reduction setting). Medium is usually the best option for a room mic.
  4. Matrix mixer: This is how to control where to send the audio signal of the mic(s). On the left the mixer shows the inputs, and on the top it displays the outputs. In this example, since there is only one mic and sending it to one camera, simply enable the matrix box corresponding to input 1 and output 1.
  5. Second Peak Meter: Press Enable Hold again on the peak meter at the end of our chain. If no other processing was done, the levels of the peak meters should match. When using more complex solutions, this will help verify the levels and verify that the mixer is configured properly.
    • Something to note about the Tesira audio is this: There is an 18 dB difference between the Tesira output block and the Axis camera. It will likely be necessary to raise the output level of the Tesira between 12-18 dB to achieve optimal levels in the Axis camera(s).

EQ and Compression

For information on EQ settings, click the image below:

EQ Page.png


For Compression parameters, click the image below:

Compression Page.png

Retrieved from "https://ipivs.info/wiki/index.php?title=Simple_Configuration&oldid=9145"