Extron electronics MediaPort 200 User Manual
Audio application tutorial
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Summary of Contents for Extron electronics MediaPort 200
- Page 1 User Guide USB Switchers and Bridges MediaPort 200 Audio Application Tutorial 68-2755-02 Rev. A 12 15...
- Page 2 NOTE: A note draws attention to important information. Extron Glossary of Terms A glossary of terms is available at http://www.extron.com/technology/glossary.aspx. Copyright © 2015 Extron Electronics. All rights reserved. Trademarks All trademarks mentioned in this guide are the properties of their respective owners. The following registered trademarks ®...
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Page 3: Table Of Contents
Program L/R Inputs 9 and 10 ......24 Application Setup Examples ........ 4 USB Communications Input 11...... 24 Application 1 – Standalone MediaPort 200 ..4 Video Codec Input 12 ........25 Application 2 – MediaPort 200 with DSP Processor with AEC ........5 Control –... - Page 4 Mix tab ............32 Output tab ............. 33 External Processors ........... 34 Peak Meters in dBFS ........34 Peak Meters in dBu ........34 RMS Meters in dBu ........34 Sound Reinforcement System ......34 MediaPort 200 Audio Application Tutorial • Contents...
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Page 5: Audio Application Setup
Audio Application Setup The MediaPort 200 is designed to integrate seamlessly into a variety of applications. This section contains tutorials for how to set up the MediaPort 200 in the following applications: • Application 1 – MediaPort 200 (standalone) •... -
Page 6: Usb Communications Input
It is also summed and sent by itself to the AEC Ref Out. When the MediaPort 200 is used with a DSP processor, USB far end audio should be muted to the line output, and received at the DSP processor from the MediaPort Ref Out instead. -
Page 7: Line Output
MediaPort 200 and a hardware codec when the same mic applied to the MediaPort 200 is to be simultaneously used as the mic source for the hardware codec. MediaPort 200 Audio Application Tutorial • Audio Application Setup... -
Page 8: Application Setup Examples
Application Setup Examples Application 1 – Standalone MediaPort 200 This is an application for soft codec conferencing, where the MediaPort 200 operates as a standalone device. Audio OVER TEMP LIMITER/PROTECT SIGNAL XPA 1002 XPA 1002 100-240V - - A MAX... -
Page 9: Application 2 - Mediaport 200 With Dsp Processor With Aec
MediaPort AEC Ref output sends far end USB communications audio to the DSP processor as an AEC reference. The line output from the MediaPort 200 sends program audio to the DSP processor, where it’s routed for AEC reference and for sound reinforcement. The send to the sound reinforcement system, which includes program and far end audio, comes from the DSP processor output. - Page 10 DSP processor. Connect the AEC Ref output of the MediaPort 200 to a line input on the DSP processor [DMP 128 Input 11 (“MP Far End”)].
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Page 11: Application 3 - Mediaport 200 With Hardware And Software Codecs
Application 3 – MediaPort 200 with Hardware and Software Codecs This is an application for soft codec conferencing in a room that also has a hardware video codec. Either may be used independently at any time. This application uses the single microphone input on the MediaPort 200 for both conferencing devices. -
Page 12: Application 4 - Mediaport 200 With Hardware And Software Codecs And Dsp Processor
Application 4 – MediaPort 200 with Hardware and Software Codecs and DSP Processor This is an application for soft codec conferencing in a room that also has a hardware video codec, in addition to a DSP processor that adds multiple microphones with distributed AEC. - Page 13 Connect the line output of the MediaPort 200 to line inputs on the DSP processor [DMP 128 Input 9 (“MP Program L”) and Input 10 (“MP Program R”)]. Connect the AEC Ref output of the MediaPort 200 to a line input on the DSP processor [DMP 128 Input 11 (“MP Far End”)].
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Page 14: Using The Mix Tab
Using the Mix Tab Navigate to the Mix tab in PCS. Once the MediaPort 200 inputs are set up for optimal levels, and the outputs are set according to the signal level needed at the receiving devices (such as amplifiers, DSP processor, and video codecs), MediaPort 200 mix and listening levels may be controlled from the Mix tab. -
Page 15: Mix Tab Details
This setting allows USB Communications audio and program audio to be routed separately to the DSP processor, with USB Communications audio sent only to the AEC Out and program audio sent only to the line out. MediaPort 200 Audio Application Tutorial • Audio Application Setup... -
Page 16: Near End
When the USB Communications is sent to AEC Ref Out only, the application is using a DSP processor in conjunction with the MediaPort 200. In this case, volume control will be performed in the DSP processor. It is recommended that in such an application, the Room Volume fader is set to 0 dB, or unity gain, which essentially leaves both the Program Mix and USB Communications levels unaffected by the Room Volume fader. -
Page 17: Mediaport 200 Signal Flow
Figure 6 is a basic signal flow block diagram showing the MediaPort default configuration and available processing. The Matrix Routing Table is a truth table that illustrates MediaPort 200 routing. Viewing the mix matrix routing from the perspective of the outputs: USB Out •... - Page 18 GAIN COMP GAIN USB COMMUNICATIONS L GAIN COMP DUCKER GAIN USB COMMUNICATIONS R GAIN COMP DUCKER GAIN MIC/LINE IN GAIN COMP DUCKER GAIN Figure 6. Basic Signal Flow Diagram (Example) MediaPort 200 Audio Application Tutorial • MediaPort 200 Signal Flow...
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Page 19: Mixing And Control
The signals associated with these four controls comprise the mix that is sent to the MediaPort Line Out. The Program Mix audio, minus the From Far End audio (USB Communications), comprise the mix that is sent to the USB Out. MediaPort 200 Audio Application Tutorial • MediaPort 200 Signal Flow... - Page 20 GAIN USB COMMUNICATIONS L GAIN COMP DUCKER GAIN USB COMMUNICATIONS R GAIN COMP DUCKER GAIN = enabled = disabled MIC/LINE IN GAIN COMP DUCKER GAIN Figure 8. USB Communication (Example) MediaPort 200 Audio Application Tutorial • MediaPort 200 Signal Flow...
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Page 21: Master Volume Controls
LINE IN R GAIN COMP GAIN USB COMMUNICATIONS L GAIN COMP DUCKER GAIN USB COMMUNICATIONS R GAIN COMP DUCKER GAIN MIC/LINE IN GAIN COMP DUCKER GAIN Figure 9. Volume Controls MediaPort 200 Audio Application Tutorial • MediaPort 200 Signal Flow... -
Page 22: Room Volume (Near End)
USB communications audio can be managed separately in the DSP processor. (Alternatively, this setting can also be used to send program and USB Communications audio to separate sound systems.) MediaPort 200 Audio Application Tutorial • MediaPort 200 Signal Flow... - Page 23 GAIN GAIN GAIN GAIN GAIN GAIN GAIN GAIN GAIN GAIN GAIN GAIN GAIN GAIN GAIN GAIN GAIN Figure 10. AEC Ref + Line Out and AEC Ref Only Routing (Example) MediaPort 200 Audio Application Tutorial • MediaPort 200 Signal Flow...
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Page 24: Mix To Far End
NOTE: The ducker can be used so that when the microphone (a talker) and program material are active simultaneously, speech takes precedence over program so that speech can remain intelligible. MediaPort 200 Audio Application Tutorial • MediaPort 200 Signal Flow... -
Page 25: Aec Ref And Aux Outs
These two outputs provide special routing capabilities that make it easy to use the MediaPort 200 with an external DSP matrix processor and/or a hardware video conferencing device (video codec). The AEC Ref Out carries the only far end USB Communications audio, while the Aux Out carries only the audio signal from the MediaPort Mic/Line In. -
Page 26: Configurations For Dmp 128
In the DMP 128 AEC processing dialog, “AEC Ref (Virtual Return #H)” is assigned as the AEC reference for mic inputs 1 – 8. Program L/R Inputs 9 and 10 Program content comes from the MediaPort 200 Line Output L/R, which is a mix of the USB Playback, HDMI, and Line Input signals. •... -
Page 27: Usb Communications Input 11
USB Communications Input 11 “Far end” audio from a soft codec conference is received at the MediaPort’s USB Communications input and is sent to the MediaPort 200 Ref Out. • MediaPort Ref Out is connected to DMP 128 Input 11 “MP Far End.”... -
Page 28: Routing For Application #4
Virtual Return A is also routed to Output 4, connected to the video codec. Program L/R Inputs 9 and 10 Program content comes from the MediaPort 200 Line Output L/R, which is a mix of the USB Playback, HDMI, and Line Input signals. -
Page 29: Video Codec Input 12
“Far end” audio from a hardware video codec conference line output is connected to DMP 128. • Video codec line out is connected to DMP 128 Input 12 “Video Codec.” DMP 128 Input 12 is routed Output 3. Output 3 is connected to the MediaPort 200 Mic/ • Line Input. •... -
Page 30: Control - Application #2
“Privacy Mute.” This control mutes the mic mix routed to Output #3, connected to the MediaPort 200 Mic/Line Input, and ultimately to the far end of a soft codec conference. This control can be used for privacy during a conference call, to mute the near end mics going to the far end while still being able to hear the far end. -
Page 31: Group Masters
Far End (mute) Mute control for far end audio (from MediaPort) to local room Privacy Mute Mutes local mics for private discussion Figure 15. Application #2 Group Controls MediaPort 200 Audio Application Tutorial • Configurations for DMP 128... -
Page 32: Control - Application #4
A master mute control for the Video Codec feed is located at the Input 12 pre‑mixer gain point. This control will mute the Video Codec signal to both the local room and the MediaPort 200. MediaPort 200 Audio Application Tutorial • Configurations for DMP 128... -
Page 33: Privacy Mute - Master Mute
“Privacy Mute.” This control mutes the mic mix routed to Output #3, connected to the MediaPort 200 Mic/Line Input, and ultimately to the far end of a soft codec conference. This control can be used for privacy during a conference call, to mute the near end mics going to the far end while still being able to hear the far end. -
Page 34: Gain And Dsp Processing
If microphones are not gating on and off properly, adjustments to the threshold and other parameters may need to be made. For more information, see the DMP 128 User Guide. MediaPort 200 Audio Application Tutorial • Configurations for DMP 128... -
Page 35: Input Signal Chain (Line Level Devices)
–3 dBFS point for extended periods of time, you might hear the limiting of the dynamic range of the signal. In this case, you may want to lower the output gain control by 5 dB. MediaPort 200 Audio Application Tutorial • Configurations for DMP 128... -
Page 36: Gain Structure
Setting proper input gain is fundamental to any audio device, and therefore, the Input tab is placed first in the Audio Config section of PCS. The MediaPort 200 uses digital peak meters, referenced to 0 dBFS, or “full scale.” The strongest level that can be achieved without clipping is the optimal signal level, in other words, approaching 0 dBFS yet with sufficient headroom to never reach 0 dBFS, which is clipping. -
Page 37: Output Tab
MediaPort line output level, the Line Out attenuation control set to 0 dB will give the best signal to noise results. See section, Sound Reinforcement System on page 34 for more information. MediaPort 200 Audio Application Tutorial • Gain Structure... -
Page 38: External Processors
Peak Meters in dBFS If the external device uses the same type of metering as the MediaPort 200, then maintaining unity gain between devices becomes simpler. For instance, if the MediaPort line output has a maximum level at −10 dBFS, then set the line input of the external device to have a maximum level of −10 dBFS. - Page 39 Extron Electronics makes no further warranties either expressed or implied with respect to the product and its quality, performance, merchantability, or fitness for any particular use. In no event will Extron Electronics be liable for direct, indirect, or consequential damages resulting from any defect in this product even if Extron Electronics has been advised of such damage.