The Audio Lounge
Feb 22, 2020 at 9:51 AM Post #22,382 of 35,993
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Feb 23, 2020 at 10:19 AM Post #22,386 of 35,993
 
Feb 23, 2020 at 6:54 PM Post #22,387 of 35,993
 
Feb 24, 2020 at 10:06 AM Post #22,389 of 35,993
Is anyone else not getting email notifications from the site? I missed WOW and everything the last half of the week.

I've had a small fraction of what I normally get. I thought it was low activity but now I'm in your camp that there are many missing.
 
Feb 24, 2020 at 12:02 PM Post #22,391 of 35,993
Is anyone else not getting email notifications from the site? I missed WOW and everything the last half of the week.


I just got 6 notifications. Might be fixed.
 
Feb 24, 2020 at 12:44 PM Post #22,392 of 35,993
Here's an off-the-wall question for you -

We know that for higher sound quality with Bluetooth wireless audio, we look for systems that use the aptX or LDAC codecs.

So, I'm wondering what sort of codecs are used for WiFi devices, like the Roku Net Streamer Remotes (which have earphone jacks and local volume control buttons)?
 
Feb 24, 2020 at 3:48 PM Post #22,393 of 35,993
Here's an off-the-wall question for you -

We know that for higher sound quality with Bluetooth wireless audio, we look for systems that use the aptX or LDAC codecs.

So, I'm wondering what sort of codecs are used for WiFi devices, like the Roku Net Streamer Remotes (which have earphone jacks and local volume control buttons)?
They use IEEE wireless protocols. The protocol used depends on the type of wireless used but will be a subset of the 802.11 protocol. The wireless protocols are a subset of the IEEE 802 LAN/MAN standard. http://www.ieee802.org/ https://en.wikipedia.org/wiki/IEEE_802

To answer your question. Bluetooth and Wireless do not use a codec directly. The codec data is transferred in a packetized form from one node (device) to another. For instance, a node would be your dap, and your Bluetooth receiver on your headphones or your bluetooth dac would be a node too. The entire IEEE 802 standard is a way to transfer data from one node to another, in a packetized format, and keep that data intact. It's very complicated and takes many years, days, hours of studying to understand depending on your savvy and technical prowess. I'll put links and pictures below for info on the 802 standard so you can study it if you want.

https://searchmobilecomputing.techtarget.com/definition/IEEE-802-Wireless-Standards-Fast-Referencea
https://thenetworkseal.wordpress.com/general-network/data-link-layer/packet-structure-of-frame/
https://ieeexplore.ieee.org/document/4460126


8-802-11wirelesslan-111113024915-phpapp02-thumbnail-4.jpg

LAN.jpg

ethernet_wifi_frames.jpg

mac-address-and-ip-address_orig.png
 
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