Nice conditions on 20 meters today so I put out a CQ and worked quite a lot of stations. Had a very nice QSO with Predrag YU1FE from Belgrado and we had a talk about sound quality on HF. He recorded me while I switched my EQ on/of and fiddled with the bandwidth settings and has sent me the sound clip by email. You can listen to it here:

Although not quite zero beat, I think the audio of my old Kenwood is doing very well.