Author Archives: Nigel Redmon

How many bits can you hear? video

A listening test in video form. On the plus side, it’s helpful to see the spectrum as it’s playing, and a peak meter to see how the sweeps compare to each other, and to the announcing voice. On the minus … Continue reading

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A listening test

Click to play in your browser, or right-click-download to play as you wish (24-bit .wav file): multi-level sweeps.wav I call this a listening test, because it involves your ears, equipment, and even environment. Any of these can influence your limits … Continue reading

Posted in Digital Audio | Tagged , | 1 Comment

Biquad calculator v3

The latest version of the biquad calculator. It also takes on the functionality of the frequency response grapher:

Posted in Biquads, Digital Audio, Filters, Widgets | Tagged | 24 Comments

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 | 5 Comments

Amplitude Modulation Principles and Interactive Widget video

This video demonstrates important uses of AM—and serves as a demonstration of using the AM widget.

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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

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AM widget

Posted in Amplitude Modulation, Widgets | Leave a comment

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

WaveTableOsc optimized

The wave table oscillator developed here in 2012 is pretty lightweight, but I never took a close look at optimization at the time. An efficient design is the number one optimization, and it already had that. I was curious how … Continue reading

Posted in Source Code, Wavetable Oscillators | 6 Comments