kiwirecorder compression

HB9TMC

Do I understand correctly, that kiwiclient (and also the web interface) is using LZ77 for audio stream compression?

So it is lossless compression?

jks

No, ADPCM. Computationally inexpensive but lossy. I have no idea what the computational or latency issues of LZ77 would be.

server side:

github.com/jks-prv/Beagle_SDR_GPS/blob/master/rx/csdr/ima_adpcm.cpp

client side:

github.com/jks-prv/Beagle_SDR_GPS/blob/master/web/openwebrx/ima_adpcm.js

HB9TMC

Ok thanks

WA2ZKD

related info:

https://hydrogenaud.io/index.php/topic,27453.0.html

jks

And of course kiwirecorder has an option to disable audio compression. Same effect as the comp button on the audio tab of the web interface.