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theFork / uMIDI

MIDI application development toolkit
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Missing CC values #62

Closed theFork closed 8 years ago

theFork commented 8 years ago

Apparently not all possible CC values are transmitted by the expression app. I observed this with echo activated on the serial console, directed the output to a file, sorted the lines and removed duplicate, see the resulting file.

This is the software installed, it already includes the fixes for #52 : Software ID: 2016-07-23 expression app/expression-0271e1c

Maybe useful - the current calibration dump: Offset: 187 Min: 0 Max: 87

ghost commented 8 years ago

It's not a bug - it's a feature! ^^

The ADC sample input range [0, 87] is scaled to [0, 127] with a simple linear function: output = (127 / 87) * input Since both input and output are integers, some values of the output set are skipped.

What we could do is pass the raw ADC samples to the math function without converting them to MIDI values first. See: file:///home/haggl/repositories/uMIDI/doc/html/adc_8c.html#a544753e4ff62df959e2202025faaa0d9 But then all applications will have to do this themselves at some point.

Another possibility could be using the linear_to_midi function in the above mentioned function directly.

ghost commented 8 years ago

Fixed: dac0d4b