#Computerclub2:
#CC2tv #421:

Extreme Effizienz für #Audio

#Extreme_Effizienz bei #Audioübertragungen mit #Codec2
Die Entwicklung digitaler Verfahren zur komprimierten #Audioübertragung hat in den vergangenen Jahrzehnten signifikante Fortschritte erzielt, wobei Formate wie MP3 weite Verbreitung fanden. Diese etablierten Standards weisen jedoch den Nachteil auf, dass sie für eine adäquate #Wiedergabequalität eine vergleichsweise hohe Datenübertragungsrate benötigen...

https://cc2.tv/daten/20260314100000.php

@emilianosandri @CatAClock @Daojoan the nice part about #Mumble is that it works excellent as #VoiceChat, with both #narrowband (down to #Codec2 @ 1200bt/s) and HQ (#Opus) and OFC low-latency (#Speex) being supported.

@HopelessDemigod Isn't te use of #encryption and/or proprietary protocols explicitly banned in #Hamradio?

Open source DMR (Digital Mobile Radio) modem implementation in software defined radio with GNU Radio and Codec2

Open source DMR (Digital Mobile Radio) modem implementation in software defined radio...

@ustralien and even then:

Modern #Codecs like #Speex and espechally #Opus really work great on #Mumble and other solutions like #WebCall and #SIP-Clients like #Linphone.

  • Unless you're stuck on #Iridium, then #Codec2 is the only thing narrowband-efficient enough to work at all...

@herrorange Already existing options do that better than the old #SILK codec.

I mean, I don't expect a #Tablet to have good #Audio quality.

  • Frankly I'd be content with #Codec2-level #AMR since no carrier properly implements #AMRWB anyway. Everyone who even halfasses #AudioQuality will plug in a headset anyway...

But being able to just chug in a #SIM and test it by calling it is something people do need rather often!

  • Even if it's just for a few calls like booking a data package on the go!

https://infosec.space/@kkarhan/113865596661922371

Kevin Karhan :verified: (@[email protected])

Attached: 1 image [#TLDR: JUST TELL ME *IF* YOUR TABLET CAN DO #CALLS!] #DearVendors of #Android-#Tablets: Off all the #Functions you can put into a #Specifications Sheet of your Devices there's one you should *ALWAYS answer clearly* on your #Website: *DOES YOUR TABLET [with #4G / #5G / …) SUPPORT MAKING PHONE CALLS?* - *NOT* "It can run #WhatsApp" (or *whatever shitty #CCSS for #VoIP* you think of)... - *NOT* "It can do #CSD / #HSCSD / #2G / #3G /..." - *But* DOES IT SUPPORT #GSM-#Calls (and/or #VoLTE)?? Like: *IS IT TOO MUCH TO ASK TO HAVE THAT INFO IN THE SPECSHEETS?* You're obviously able to list all the #Codecs natively supported and the user-available storage as well as supported Frequency Bands, WWAN modes, WiFi channel width and the Display Glass vs. Panel dimensions including DPI of the latter and whether or not it has a hall effect sensor to detect your overpriced 1st party tablet covers! Now some folks may ask: *"WHY does this matter?"* or outright dismiss this as a problem. Listen: Not everyone is able or willing to carry *two* devices when 1 *SHOULD BE ENOUGH* and also some places (i.e. #Turkey) have #ImportRestrictions re: #MobileDevices, so having more than 1 #IMEI is already a *"NOPE!"* by the authorities. - Also this isn't something one can *"fix"* post-purchase like installing #VLC to decode some obscure file format in Software: Either *the #Baseband and #ROM support #PhoneCalls or they don't!* So why do *NONE* of the #Tablet manufacturers allow to #search or #filter for that??? - Bonus points if you have lazy fucks like #HMD (aka. #Nokia) who literally copy the #Safety & #Useage information for all #Smartphones and #Tablets and don't even bother to change *"Mobile Phone"* for *"Tablet"*. *NO*, instead one has to download an *obscenely huge #PDF* just to then [read on page 34](https://downloadcenter.samsung.com/content/UM/202410/20241010132004137/SM-X11X_X21X_UM_Open_UU_Ger_Rev.1.2_240925.pdf) that for any *"#telephony"* function you *NEED YET ANOTHER DEVICE FROM THE SAME MANUFACTURER AND HAVE TO SIGNUP WITH AN ACCOUNT* and even that level of #abuse WON'T GUARANTEE THAT IT WORKS... - I mean, come on, this *ain't* some *obscure functionality* like #OMAPI to do some *"evil sourcery"* like *managing an #eSIM that is in a #SIM-Card form factor*! Pretty shure *A LOT* of other folks have the same question and ain't willing to get *yet another device & #SIM* just to recieve *the occasional call* because #TechIlliterates can't be assed to send an #eMail or learn #XMPP+#OMEMO to message one... - Obviously they same manufacturers are *able and willing* to specify *f-stops* of the built-in cameras and list *EVERY SINGLE #WEARABLE* they made and certify as *'compatible'* with, as if *anyone* is gonna take their non-#waterproof #Tablet for a marathon or god forbid triathlon... #Rant #TechSupport #Technology #Support #Sysadmin #Procurement #IT #SpecSheet #Tech

Infosec.Space

@stephen @foone if you choose the spectrum wisely you can moonbounce... ^

  • Tho that usually requires something like #Codec2 @ 450 bit/s on #SSB...
Playing around with FreeDATA (https://freedata.app/) app on 40 meters. What a nice modern application, can operate keyboard-to-keyboard QSO's and leave messages from a remote PC using a webbrowser. Seems like a nice modern alternative to #JS8CALL. It's based on the open source #Codec2 which is also used for #FreeDV and #M17. No need for proprietary software modems like #VARA anymore. If you like stuff like #VarAC or #JS8 give this a try! #hamradio #ham #freedata
FreeDATA

a free & open-source application for sending data through HF channels...

@xssfox personally, I think #Codec2 is pretty awesome given it's a #FLOSS codec that can work with as little as 450bit/s, making #DigitalVoice via #Moonbouce possible!