Thursday, 5 October 2017

Design Considerations for the I-Mon Immersive Audio Monitoring system

The I-Mon is our new 7.1.4 Immersive Audio Monitoring system, based on our existing A-Mon Monitoring system with a number inputs and outputs reassigned. The combination of the I-Mon and TMC-1 is a stand alone Atmos capable system for the smaller studio.

The problem with analogue circuitry is that unlike digital systems the routing is defined by the hardware. The modular design of the A-Mon enabled the I-Mon to be made by redesigning a single board.
I-Mon Specification
Inputs :: Outputs
Main Input : 7.1.4
Alt Input: 7.1
2 dedicated Stereo inputs
2 or 3 Stereo and/or cue inputs
Stereo AFL input
1 or 2 Talk back inputs
1 or 2 Listen back inputs
Main Output: 7.1.4
Alt Output or Rear Bass Extension: Stereo
Mini Output: Stereo
4 Cue Send Outputs
Stereo Downmix Output
Optional External Meter O/P
Slate Out

You can download a I-Mon/A-Mon/XMon comparison chart  comparison.pdf



The I-Mon uses the same chassis as the A-Mon and has the same number of inputs, outputs and internal switches, the design of the I-Mon involved some compromises and rethinking,

1) Remove some A-Mon features for listening to 5.1 and 7.1 on Stereo speaker or 7.1 on  5.1 speaker layouts - No Centre speaker, No Rear speakers, No LFE Speaker.
2) Reassign  2 Stereo inputs  as 4 Overhead inputs
3) Reassign 4 of the Alt outputs as 4 Overhead outputs
4) reassign 2 of the Alt outputs as Left and right Surround Bass Extension or Stereo Alt Output.
5) Cue input 1 can reconfigured as 2nd Talkback and 2nd Listen Back inputs.
6) Reassign SLS and H/P metering as Overhead input metering
7) Move Left and Right Metering to after Left and Right Source selection to allow SLS and H/P metering when PFL active
8) Add switching enabling the Cue Inputs be used as stereo inputs
9) Add an External metering output.
10) Add an Ethernet remote control connection

The PCB layout for the new card is now complete, we are now consulting with users before ordering and making the PCB's and metalwork. We welcome your input, especially before we commit the design to hardware!

Delivery for the I-Mon is currently about 6 weeks.








1 comment:

Terry said...

Hello Colin, thanks for the update and we can natter at AES.

An immediate thought is that the unit could also be used for an Auro-3D setup, such as 5.1 lower layer, 5 channel upper layer and mono overhead. Something to think about.

See you in NY...

Cheers,

Terry