Related: this is why the audio quality of phone calls is so bad. It’s using what’s basically a predecessor of mp3 compression at a very low bitrate. Originally because that’s what the bandwidth limits were like, but now just for the sake of backwards compatibility. That’s why making a VOIP call sounds so much better: it’s using modern audio codecs and a higher bitrate.
Related: this is why the audio quality of phone calls is so bad. It’s using what’s basically a predecessor of mp3 compression at a very low bitrate. Originally because that’s what the bandwidth limits were like, but now just for the sake of backwards compatibility. That’s why making a VOIP call sounds so much better: it’s using modern audio codecs and a higher bitrate.