The SELOPT-AAEX-AABS analog audio expansion modules sit adjacent to the frame sync and video conversion application modules in the Selenio frame so as to add analog audio interfaces. The analog audio expansion modules deliver more inputs and outputs and additional functionality to the Selenio platform.
When an expansion module is installed beside an applications module, an automatic connection takes place. The corresponding block diagram in the graphical user interface is updated, giving the user setup, control and monitoring functions.
Audio signals are connected internally over bidirectional high-speed busses, eliminating external cabling.
Additional audio processing functionality can be added to audio expansion modules including Dolby® codecs, MPEG audio codecs, AAC codecs and DTS Neural Surround™ UpMix/DownMix and loudness control.
When viewing the front of the frame, the audio expansion modules are added to the right of the frame sync applications module (higher slot numbers).
Audio Expansion Capability
Up to two analog audio expansion modules and/or digital audio expansion modules — or a combination of five analog and digital audio expansion modules — can be placed beside an encoder, decoder, frame sync or video conversion application module. Configurations include the following:
| Audio Expansion Configurations | AES Inputs/Outputs | AES Inputs | AES Outputs | Analog Inputs | Analog Outputs |
| Main Video and Audio Module | 8 | 0 | 0 | 0 | 0 |
| Digital Audio Expander Module | 0 | 8 | 16 | 0 | 0 |
| Analog Audio Expander Module | 0 | 0 | 0 | 8 | 8 |
| Configurations #1 | |||||
| Main Video and Audio Module | 8 | 0 | 0 | 0 | 0 |
| Digital Audio Expander Module | 0 | 8 | 16 | 0 | 0 |
| Digital Audio Expander Module | 0 | 8 | 16 | 0 | 0 |
| 8 | 16 | 32 | 0 | 0 | |
| Configurations #2 | |||||
| Main Video and Audio Module | 8 | 0 | 0 | 0 | 0 |
| Analog Audio Expander Module | 0 | 0 | 0 | 8 | 8 |
| Analog Audio Expander Module | 0 | 0 | 0 | 8 | 8 |
| 8 | 0 | 0 | 16 | 16 | |
| Configurations #3 | |||||
| Main Video and Audio Module | 8 | 0 | 0 | 0 | 0 |
| Digital Audio Expander Module | 0 | 8 | 16 | 0 | 0 |
| Analog Audio Expander Module | 0 | 0 | 0 | 8 | 8 |
| 8 | 8 | 16 | 8 | 8 | |
Please note the following for the advanced audio plug-in:
Back Module
The SELOPT-AAEX-AABS analog audio expansion module has one back module for external connectivity — multi-pin with mating connectors.
Back Module

Specifications and designs are subject to change without notice.
| Audio Inputs | |
| Number of Inputs | 8 mono channels |
| Type | Balanced |
| Connector | Weidmüller |
| Input Audio Level | 28 to 12 dBu (0 dBFS, user adjustable in 1dB increments) |
| Input Impedance | High-impedance or 600 ohms, jumper selectable |
| CMRR | >80 dB @ 60 Hz, typical |
| Audio Outputs | |
| Number of Outputs | 8 mono channels |
| Type | Balanced |
| Connector | Weidmüller |
| Output Audio Level | 28 to 12 dBu (user adjustable in 1 dB increments) |
| Output Impedance | 66 or 600 ohms, jumper selectable |
| Frequency Response | <±0.05 dB, 20 Hz to 20 kHz, typical |
| THD | >100 dB (0.001%), (20 Hz to 20 kHz, -1 dBFS), typical |
| SNR | >114 dB (-60 dBFS input, 997 Hz, 20 Hz to 20 kHz, unweighted), typical |
| Crosstalk | >107 dB, (20 Hz to 20 kHz, -1 dBFS), typical |
| Linearity | <±0.2 dB (to -100 dBFS), typical |
| Power Consumption | 40 W maximum |
| SELOPT-AAEX1-AABS | Analog audio expansion front module, adds more inputs and outputs to FS/XD/ENC/DEC, includes single back module with two Weidmuller connectors for 8 analog (balanced) inputs and 8 analog (balanced) outputs, mating connectors (2) included |
| Audio Expansion Front Module | |
| SEL-FM-AAEX | Analog audio expansion, front module only |
| Audio Expansion Back Module | |
| SEL-BM-AA | Single back module for analog audio expansion front module with two Weidmuller connectors for 8 analog (balanced) inputs and 8 analog (balanced) outputs, mating connectors (2) included |
| Cables, Adaptors, Connector/Tools | |
| SELOPTCAB-HD-BNC-V | HD-BNC plug to BNC jack adaptor cable for video (12 in.) |
| SELOPTCAB-HD-BNC-A | HD-BNC plug to BNC jack adaptor cable for audio (12 in.) |
| SELOPT-TOOL-CABLE | HD-BNC cable insertion and extraction tool |