I agree about the delay that sometimes (way more often than it should) occurs in digital calls, but the voice quality of analog calls was shit. It was band limited to something like 8kHz (so maximum of 4kHz signal making it to your ear). That seems like a lot, but it really isn't. There's a significant amount of high end that gets lost and makes everything seem muddled. I remember making calls over 22kHz audio codecs in the late 90s and the quality of even that (maximum frequency transmitted being 11kHz) was way better than an analog phone call.