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function walkAudio() {
    // creates distringuishable features of audio
}

function selectAudio() {
    // queries specific features of audio
}

What the code could have been:

/**
 * Extracts distinguishable features from the audio signal
 * 
 * @param {Array} audioSignal - A 1D array representing the audio signal
 * @returns {Object} features - An object containing the extracted features of the audio signal
 */
function walkAudio(audioSignal) {
    // Check if input is a valid array
    if (!Array.isArray(audioSignal)) {
        throw new Error('Input must be a valid array');
    }

    // Extract Mel-Frequency Cepstral Coefficients (MFCCs)
    const mfccs = extractMFCCs(audioSignal);
    
    // Extract Mel-Scale Spectral Features
    const melSpectralFeatures = extractMelSpectralFeatures(audioSignal);

    // Return extracted features
    return { mfccs, melSpectralFeatures };
}

## selectAudio Function
### Queries Specific Features of Audio

### Parameters:
- `audioSignal`: A 1D array representing the audio signal
- `featureType`: A string indicating the type of feature to query (e.g.,'mfcc','melSpectral')
### Returns:
- `featureValue`: The value of the queried feature

## Audio Analysis Functions

### walkAudio()

* Purpose: Creates distinguishable features of audio
* Returns: Audio features
* Notes: Not implemented in provided code snippet

### selectAudio()

* Purpose: Queries specific features of audio
* Returns: Selected audio features
* Notes: Not implemented in provided code snippet