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Category Archives: Digital Audio
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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Further thoughts on wave table oscillators
I see regular questions about wave table oscillators in various forums. While the process is straight forward, I sympathize that it’s not so simple to figure out what’s important if you really want to understand how it works. For instance, … Continue reading
Posted in Digital Audio, Oscillators, Wavetable Oscillators
12 Comments
WaveUtils updated
WaveUtils needed only a minor change for compatibility with the WaveTableOsc update—addWaveTable changes to AddWaveTable. But I added something new while I was at it. The original wave table articles advocated minimizing the number of tables necessary—one per octave—by allowing … Continue reading
Posted in Source Code, Wavetable Oscillators
16 Comments