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Wi-LE: Can WiFi replace Bluetooth? (2019) [pdf]

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Re: Wi-LE: Can WiFi replace Bluetooth? (2019) [pdf]

#71

Post by mlichvar »

timonoko wrote: post #48
rektide wrote: post #5

if only there were some good flows for attaching sound input / outputs & input devices over wifi there are some technical means. one could use usb-ip[1] to bridge peripherals, for example. but few rise to the status of "flows", good well paved paths. [1] http://usbip.sourceforge.net/

Netcat and sox works spendidly: rec -p | nc -l 7777 nc 192.168.1.11 7777 | play -v 0.1 -

That can work, but probably not very well. Without real-time resampling some buffer in the path will underrun or overrun depending on whether the recording soundcard is sampling slower or faster than the playback soundcard. The clocks are not synchronized.

Re: Wi-LE: Can WiFi replace Bluetooth? (2019) [pdf]

#72

Post by esperent »

AndrewDucker wrote: post #58
otabdeveloper4 wrote: post #57

Where I live the Wi-Fi spectrum is already busted. There are several dozen visible access points right now, and if I go outside where no metal shielding is happening I'd probably see 100 or more of them. And that's just the well-behaving honest Wi-Fi access points, not all the other crap on these frequencies that periodically destroys signal with interference.

Bluetooth uses exactly the same spectrum as one of the WiFi frequencies (2.4GHz).

And when I have wifi turned on on my laptop, I get a .5 second gap in bluetooth audio approximately once every thirty seconds.

Re: Wi-LE: Can WiFi replace Bluetooth? (2019) [pdf]

#73

Post by timonoko »

mlichvar wrote: post #71
timonoko wrote: post #48

Earlier quoted context omitted.

Netcat and sox works spendidly: rec -p | nc -l 7777 nc 192.168.1.11 7777 | play -v 0.1 -

That can work, but probably not very well. Without real-time resampling some buffer in the path will underrun or overrun depending on whether the recording soundcard is sampling slower or faster than the playback soundcard. The clocks are not synchronized.

I wörks!. I have microphone outside soundproof windows and it is very synchronized, within 200 milliseconds. Good enuff for movies methinks.

Re: Wi-LE: Can WiFi replace Bluetooth? (2019) [pdf]

#74

Post by MayeulC »

AndrewDucker wrote: post #58
otabdeveloper4 wrote: post #57

Where I live the Wi-Fi spectrum is already busted. There are several dozen visible access points right now, and if I go outside where no metal shielding is happening I'd probably see 100 or more of them. And that's just the well-behaving honest Wi-Fi access points, not all the other crap on these frequencies that periodically destroys signal with interference.

Bluetooth uses exactly the same spectrum as one of the WiFi frequencies (2.4GHz).

Right, though it uses narrower frequency bands, so you have about 10 times as many channels in the same ammount of spectrum.

And Bluetooth hops around these channels, dynamically selecting the one with less interference.

Re: Wi-LE: Can WiFi replace Bluetooth? (2019) [pdf]

#75

Post by KorfmannArno »

esperent wrote: post #72
AndrewDucker wrote: post #58

Earlier quoted context omitted.

Bluetooth uses exactly the same spectrum as one of the WiFi frequencies (2.4GHz).

And when I have wifi turned on on my laptop, I get a .5 second gap in bluetooth audio approximately once every thirty seconds.

Turning on Wifi makes bluetooth audio unbearable on my Lenovo Chromebook.

Re: Wi-LE: Can WiFi replace Bluetooth? (2019) [pdf]

#76

Post by timonoko »

timonoko wrote: post #73
mlichvar wrote: post #71

Earlier quoted context omitted.

That can work, but probably not very well. Without real-time resampling some buffer in the path will underrun or overrun depending on whether the recording soundcard is sampling slower or faster than the playback soundcard. The clocks are not synchronized.

I wörks!. I have microphone outside soundproof windows and it is very synchronized, within 200 milliseconds. Good enuff for movies methinks.

Correccion. It is actually 3 seconds via Wifi. Previous test was direct loopback in the same machine. Good for music and other non-synchronized activities anyways.

Re: Wi-LE: Can WiFi replace Bluetooth? (2019) [pdf]

#78

Post by rowanG077 »

reaperducer wrote: post #46
eru wrote: post #45

Earlier quoted context omitted.

Slightly off-topic: Caring about slight latency differences but then still using joysticks for a shooter seems rather weird.

And yet when the military wants to shoot for real, it uses joysticks and not keyboards.

Of course because. A mouse cannot keep up with the real world. In a sense a mouse is too good. With a joystick it's fine if your actuation is slow because the joystick allready soaks up a lot of that shitty interface.

Re: Wi-LE: Can WiFi replace Bluetooth? (2019) [pdf]

#79

Post by timonoko »

timonoko wrote: post #76
timonoko wrote: post #73

Earlier quoted context omitted.

I wörks!. I have microphone outside soundproof windows and it is very synchronized, within 200 milliseconds. Good enuff for movies methinks.

Correccion. It is actually 3 seconds via Wifi. Previous test was direct loopback in the same machine. Good for music and other non-synchronized activities anyways.

Correccíon #2: If you manage to start both the server and client at the same moment, it is indeed 200 ms.

Re: Wi-LE: Can WiFi replace Bluetooth? (2019) [pdf]

#80

Post by canadianfella »

admax88q wrote: post #21

I think there is a wirelrss revolution around the corner being held up by patents, closed chipsets, and closed firmwares. Look at what was necessary in this papet, thr IoT device pretends to be an access point to bypass all the layers in the stack that would filter out thr packet. In this case they found a hack to workaround chipset/firmware limitations, but what other innovations havent happened due to inaccesible w…

Firmware is plural.
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