Posts tagged as «Slur»

SoME 2010 Sep: Harmonica obsession

Sound Of the Month Edition

She’s low-budget. She’s mobile. She’s a perfect companion!

Harmonica

My Harmonica

Yes, that’s my recent fascination. Makes a clear and gentle sound. Can get rough when needed.
Of course I couldn’t resist to record myself and analyze it with my geeky tools. Let’s get the show started. …read more >>

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SoME 2010 May: Frequency of Chaos

Sound Of the Month Edition

Transition from random pitch sliding into pinkish noise

Spectrogram of random walk with rising temperature

880 Hz frequency randomized with standard variance of 1 octave and rising change rate

I took a simple 880 Hz sine wave and applied noise of standard variation = 1 octave.
At the beginning the random changes are slow – you can clearly hear the sliding tone. As the rate of changes gains more speed human ear tend to loose track of the tone and start hearing burping sounds. In the end, when the temperature gets really high (higher than tone frequency), the whole wave melts down into one uniform noise.

It’s just like blending a smoothie from an audio tone :)

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Falasol Timbre project zipped file: FrequencyOfChaos

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SoME 2010 March: Nyquist frequency

Sound Of the Month Edition

This is what you get when you mess with Nyquist frequency!

Nyquist frequency

Glissando from 422400 to 422,4Hz with sampling frequency of 44000Hz

In the analog world the hyperbola from the right side of the graph would go all the way up. You actually wouldn’t be able to hear such high pitches, but you’d see a nice hockey stick on the spectrogram. However digital sampling is not able to handle frequencies higher than half of it’s own frequency – that’s the Nyquist theorem. And that’s when the weird things start to happen :)

Sounds like a plasma cannon:

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Falasol Timbre project file: Nyquist effect.timbre

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Experiments: slur vs. cross-fade

There are several ways of moving smoothly from one tone to the other. Today we are going to compare the two most common: slurring and cross-fading.

Slur

Gliding over the notes smoothly (sliding the tone).

Guitar slide

Guitar slide


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