HPR4618: Simple Podcasting - Episode 2 - Basic Filtering

Hosted by Whiskeyjack on 2026-04-15 01:00:00

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HPR Comments

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Henrik Hemrin says: Generating sine wave

RE: hpr4618::2026-04-15 Simple Podcasting - Episode 2 - Basic Filtering by Whiskeyjack
00:37:16 Listen in ogg, opus, or mp3 format.
Very interesting show. One thing in particular I find useful for testing speakers is the command to genererate a sine wave at various frequencies. I've tried the ffmpeg command version.

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Whiskeyjack says: Reply to Henrik Hemrin on Sine Waves in HPR4618

RE: hpr4618::2026-04-15 Simple Podcasting - Episode 2 - Basic Filtering by Whiskeyjack
00:37:16 Listen in ogg, opus, or mp3 format.
I am glad you found this episode interesting, including the part about generating sine waves using FFMPEG.

I cover this topic again in hpr4658 Audio Revisited, which comes out on Wed 2026-06-10 and in which one of the topics I discuss is characterizing hardware such as speakers and microphones in order to understand their limits. It also helps to understand the limits of your own ears as well.

In that episode I also cover generating a "chirp" signal, which is a tone which sweeps across the audio frequency range from low to high, which is also useful in understanding hardware.

I can recall many years ago salesmen in stereo shops using special CDs which had these signals on them which they would use to demonstrate the capabilities of the high end speakers they were selling. If you have ever wanted to have such a thing for yourself, you can generate it using FFMPEG or Sox.

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