Hi list,
I am trying to convert an audio signal to pixel data using pix_sig2pix~ and then back to audio data using pix_pix2sig~ without further manipulations. Please see attached patch.
I do scale the audio signal from -1 to 1 to lie in a range compliant to pixel data, which I assume to be 0 to 1.
Not having connected an input to the subpatch, this signal will hence be 0.5 and will display in the red color channel.
Converting that red channel back to audio signals and doing the opposite scaling operation, I am getting a 51dB constant signal at the output even without having attached a signal to the input of pix_sig2pix~. Checking with a snapshot~ object indicates a constant signal of 0.003921
I assume this to be due to limited resolution numbers in the pixel data and wonder what their resolution is?
Then I texture the pixel data onto a rectangle. This rectangle does flicker and flip diagonally from time to time and I wonder if it is an error on my machine only and where it could come from.
Also, I am getting an error message in the Pd console upon creating a single pix_sig2pix~ object in an empty patch: GEM: Someone sent a bogus pointer to copy2Image and am curious if this red error message is related to the above problem...
Thank you for all ideas and advice! Peter