MFCC uncaught error: frameSize lower bound

[jmarcosfer]

What is the issue about?

• [x] Bug
• [ ] Feature request
• [ ] Usage question
• [ ] Documentation
• [ ] Contributing / Development

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

• [x] 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