Bytebeats in Edison 3.0 (much faster than previously because we're eval-ing a lambda)

bytebeats3.pyscript

from enveditor import *

"""
Create bytebeats in Edison.

"""

def makeSample(length, srate, norm, formula):
    # Sample rate selection
    if srate == 0:
        EditorSample.SampleRate = 8000
    elif srate == 1:
        EditorSample.SampleRate = 11025
    elif srate == 2:
        EditorSample.SampleRate = 22050
    else:
        EditorSample.SampleRate = 44100
    
    # Setting sample length
    if EditorSample.Length <= 0:
        EditorSample.Length = round(EditorSample.MSToSamples(length * 1000))

    try :
        formula_func = "lambda t :  %s" % formula
        formula_func = eval(formula_func)

        x1 = Editor.SelectionStartS
        x2 = Editor.SelectionEndS

        # Byte-beat generation
        for n in range(x1, x2 + 1):
            for c in range(EditorSample.NumChans):
                s = formula_func(n)
                EditorSample.SetSampleAt(n, c, s)

        # Normalization
        if norm == 0:
            EditorSample.NormalizeFromTo(x1, x2, 0.8) 

    except Exception as e :
        Utils.ShowMessage("Exception\n%s \n%s" % (formula_func,e))

# User Interface
form = ScriptDialog('ByteBeats', 'Generate Your ByteBeats Right Now!!!')
form.AddInputKnob('Length (s)', 1, 0, 100)
form.AddInputCombo('Sample Rate', '8000,11025,22050,44100', 3)
form.AddInputCombo('Normalize?', 'Yes,No', 1)
form.AddInputText('Formula', "(128 & t * (4 | 7 & t >> 13) >> (1 & -t >> 11)) + (127 & t * (t >> 11 & t >> 13) * (3 & -t >> 9)) % 255")

if form.Execute():
    makeSample(form.GetInputValue('Length (s)'), form.GetInputValue('Sample Rate'), form.GetInputValue('Normalize?'),form.GetInputValue('Formula'))