Monday, April 19, 2021

Audio System at SFM



 Photos of components of the audio system (missing photo of power supply)











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Third visit


What we need is to go from 6.5 mm audio male to USBA audio male. 


I accidentally brought TRS rather than TRRS cables. I returned them to Amazon and ordered new ones. I left the surge protector, as those are always useful


We’ll likely need a Daisy chain of cables. 


Image of what I’ve ordered. The 3.5 mm female to USBA male includes a chip


The 3.5mm female to 6.5 mm male converter did not work as advertized.  It was a headset converter, not a microphone converter, so I substituted this one



Update 210620

relevant components:
  • 3 Crown PZM-30GBP mics installed in ceiling (communicating via XLR cables through hole in ceiling near east wall)
  • AMR aps4 phantom power supply (3 input XLR cables; 3 output XLR cables on floor; 3 switches: power, lift in & lift out; plugs into wall to power on mics) (need to take picture of this, put up an image that I found online.)
  • Harbinger HA80 mixer (takes the output XLR cables from power supply; uses 6.5 mm audio output -- use 8 Ohm output, not the line out)
Connectors that worked with David's computer (Lenovo running Ubuntu)
  • 6.5mm to 3.5mm Trrs Adapter (Bietrun?) (female to male)
  • DuKabel USB to 3.5mm Jack Audio Adapter, USB to Aux Cable with TRRS 4-Pole Mic-Supported USB to Headphone AUX Adapter Built-in Chip External Sound (female to male)
Attempted addition to run with Anne's Macbook pro
  • Cablesforless USB 3.1 Gen 1 C Male to A Female Adapter 5G 3A (female to male)
Talked to Apple. They basically abdicated.  The device was visible to the system, but not picking up signal.

Update 210629

Considering a projector

sample relationships between projection distance and screen size:

sample screen sizes:

Need to measure the size of the wall above the fireplace (8.5' across)

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