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> The only good thing is the signal clarity I recently spoke with someone, and the voice came through with sharpness, depth, and almost no distortion. Like yo
by retrac 3y ago
> The only good thing is the signal clarity
I recently spoke with someone, and the voice came through with sharpness, depth, and almost no distortion. Like you might hear from a good radio over a clear AM radio station. I had headphones in, and I was calling a department of a hospital, where they probably have a POTS landline on the last stretch, with a quality handset.
It had been a while since I had heard that. People working from home, often have cheap gear, relayed, where the audio gets compressed and decompressed several times end-to-end. And cell phones still use heavy compression, sometimes. Cheap microphones.
The old telephone system was analogue, then later PCM. 3 kHz passband, with generally quite high fidelity within that band. Music sounded like music over the telephone. These days, uncompressed PCM audio in telephony is quite rare. And the lossy codecs used are often quite lossy, designed to delivery understandable speech under adverse conditions. That made sense in the 1980s but it's only 64 kbps to stream PCM for the 3 kHz speech band.