Re: [LAU] spectrum analyzer to visualize harmonics

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To: <linux-audio-user@...>
Date: Monday, March 11, 2013 - 12:55 am

On 03/10/2013 05:08 PM, Federico Bruni wrote:

I recommend JAPA.

> I've tried JAAA but it's not much user-friendly and there's no manual.

JAAA is for making precise engineering measurements and doesn't take
into account how your ears work.

> I'd like to visualize the harmonics produced by a guitar string.

Well, that screenshot is showing a peak around 26kHz... way above what
you can hear. And the range you're interested in is all squashed on the
left-hand side of the screen between 0 and 2.5kHz.

Assuming you've got a laptop with stereo in/out:

1. Start JAPA: japa -A
2. Mute your speakers since it outputs pink noise.
3. Play your guitar into a mic. You should see what you're
looking for (limited by the quality of mic and amount of
ambient noise).

I don't think JAPA give you a way to freeze the screen and mark a peak.

If you use JACK (-J instead of -A), you have more control over
pink/white noise output.

-gabriel

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Messages in current thread:
[LAU] spectrum analyzer to visualize harmonics, Federico Bruni, (Mon Mar 11, 12:07 am)
Re: [LAU] spectrum analyzer to visualize harmonics, Gabriel M. Beddingfield, (Mon Mar 11, 12:55 am)
Re: [LAU] spectrum analyzer to visualize harmonics, Federico Bruni, (Mon Mar 11, 9:42 pm)
Re: [LAU] spectrum analyzer to visualize harmonics, Fons Adriaensen, (Mon Mar 11, 9:53 pm)
Re: [LAU] spectrum analyzer to visualize harmonics, Fons Adriaensen, (Mon Mar 11, 12:26 pm)
Re: [LAU] spectrum analyzer to visualize harmonics, Lorenzo Cecchi, (Mon Mar 11, 12:18 am)