Thankfully there’s always something new to learn. It’s just strange that it should be such a surprise after all these many years of doing this. My conclusion is that we’ve found yet another benchmark for audio amplification devices to pass before they can go out the door. I want to say intermodulation distortion but we’ve measured both of these amplifiers and they are nearly identical in this respect (as well as others we can measure). It was far easier to discern which amplifier was right using the clapping than it was music, which tends to be a bit more subjective.īut what really gets me is how one amplification device could get so “upset” when the activity level on the recording got so complex. With respect to magnitude we are not talking about shades of gray here, we’re talking night and day. What’s interesting and new to me about this test is two fold: the magnitude of difference and how the aggregated clapping seemed to so disturb the amplifier’s performance. Playing the exact same part at exactly the same level on example B sounded entirely correct. In one example the clapping of the audience was sharp, bright, confused and almost irritating. Indeed, the difference between the two areas of the recording were huge. As we went back and forth I was astounded by the results. Let’s hear that on both units.” While I was focusing on Belafonte’s voice and the small orchestra playing, Dave had been questioning the audience response. We were listening to Harry Belafonte’s live performance at Carnegie Hall when Dave asked me to play the audience clapping again. Sometimes it’s difficult because you’ll hear one aspect that is better in one amp while another aspect is better in the other. Of course we do this by simply gain matching and then listening to the same track of music and comparing the two for best presentation. We were trying to figure out which, of several types of op amps, were more musically correct. Dave Paananen, who directs our engineering, and I were in Music Room One auditioning a couple of changes to circuitry recently.
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