MFCC uncaught error: frameSize lower bound

[jmarcosfer]

What is the issue about?

• Bug
• Feature request
• Usage question
• Documentation
• Contributing / Development

What part(s) of Essentia.js is involved?

• essentia.js-core (vanilla algorithms)
• essentia.js-model (machine learning algorithms)
• essentia.js-plot (plotting utility module)
• essentia.js-extractor (typical algorithm combinations utility)

Description

When computing MFCCs, any frame size equal to or lower than 426 results in an uncaught WASM error.

Steps to reproduce / Code snippets / Screenshots

	const frames = self.essentia.FrameGenerator(msg.data.audio, frameSize, frameSize*0.5);
	for (let i = 0; i < frames.size(); i++) {
		const audioVector = frames.get(i);
		const windowedFrame = self.essentia.Windowing(audioVector, true, frameSize).frame;
		const spectrum = self.essentia.Spectrum(windowedFrame, frameSize).spectrum;
		const mfccs = self.essentia.MFCC(spectrum, 2, 11000, spectrum.size()).mfcc;
		corpusArray.push({
			id: corpusSizeCount,
			frame: self.essentia.vectorToArray(audioVector),
			analysis: self.essentia.vectorToArray(mfccs)
		});
		corpusSizeCount++;
	}

For the frame size described above, this produces the following error on the dev console:

System info

Hardware: MacBook Pro 15 inch 2018, 16GB RAM, 2,2 GHz Intel Core i7 6 cores
OS: macOS Catalina 10.15.7
Platform: Chrome 96.0.4664.110
Library version: Essentia.js 0.1.3