annotate yeti/templates.yeti @ 13:e15bc63cb146

Ranges, EM initialisation

module templates;

vec = load may.vector;
mat = load may.matrix;

// Load instrument templates

instruments = [
    "bassoon",
    "cello",
    "clarinet",
    "flute",
    "guitar",
    "horn",
    "oboe",
    "tenorsax",
    "violin",
    "piano-maps-SptkBGCl"
];

loadTemplates () = mapIntoHash id
    do instrument:
        readFile "../data/\(instrument).csv" "UTF-8"
            do istr:
                mat.fromColumns
                   (map do line:
                        vec.fromList (map number (strSplit "," line))
                    done (istr.lines ()));
            done;
    done instruments;

//!!! these ranges are hardcoded in the original (and are a bit more restrictive)
extractRanges templates = mapIntoHash id
    do instrument:
        levels = map vec.sum (mat.asColumns (templates[instrument]));
        first = length levels - length (find (>0) levels);
        last = length (find (>0) (reverse levels)) - 1;
        { lowestNote = first, highestNote = last }
    done (keys templates);

{
    loadTemplates,
    extractRanges
}