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It mattered what radio and TV you used and how good the signal of the local AM station carrying the broadcast was, if you had one (even as early as 1958, many radio stations carried only hourly news from the network they were affiliated with).
In many cases, the AM channel would outperform the TV sound. AM radio was not limited to 5 kHz audio response (a commom misconception) and some AM radios were built with low selectivity so they sounded brilliant, provided the signal was very good (well over any adjacent-channel interference). The limiting factor in the TV sound, however, was that many stations on the networks had at least one conventional telephone twisted pair along the way in the audio chain (a serious setback).
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