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Author Archives: Nigel Redmon
Analog digital continuous discrete
Digital and analog. We often think of them, mistakenly, as equivalent things in different domains. But that’s a misunderstanding, and we often use the terms incorrectly. For instance, run a mic through a preamp and get a signal, we know … Continue reading
Posted in Digital Audio, Fun Facts
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Inter-sample peaks
We’ve seen that samples can represent a signal with greater peak amplitude than the peak sample values. If those sample values were higher, the output would exceed “1.0”, or 0 dB full-scale—I’ll refer to these as “overs”. This brings two … Continue reading
Posted in Digital Audio, Fun Facts, Uncategorized
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Special case: perfect sine waves
Let’s say we want to test the output of a DAC while it passes a pure sine wave. The “pure sine wave” requirement is a bit more difficult than it might seem. In the general case, it’s not possible to … Continue reading
Posted in Digital Audio, Fun Facts
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Time resolution in digital audio
I’ve been involved in several discussions on timing resolution in digital audio, recently—honestly, I never knew it was a concern before. For example, in a video on MQA, the host explained that standard audio sample rates (44.1 and 48 kHz) … Continue reading
Posted in Digital Audio
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Amplitude Modulation Principles and Interactive Widget video
This video demonstrates important uses of AM—and serves as a demonstration of using the AM widget.
Posted in Amplitude Modulation, Digital Audio, Video
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Amplitude Modulation Deep and Fast video
Here’s Amplitude Modulation Deep and Fast, a not too lengthy video that gets to the roots of what amplitude modulation does mathematically. I’ve referred to AM’s role in sampling theory in past articles, and its relatively simple math makes understanding … Continue reading
Posted in Amplitude Modulation, Video
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