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On the side of my music:
I also do Digital signal processing with various synthesizing methods such as FM AM LSB USB, etc.
One of the things I was able to achieve, specifically in audacity and krita, was encoding such a signal that could be used on the old landlines, from an old image I had on my system.
The actual encoding of the image (in case tech is concerned), uses the same parameters as what a traditional page of fax would be encoded on the landline, at 2400 bits per second PSK.
I exported the image as a TIFF, not a JPEG, because standards usually say that older fax machines use modified huffman parameters with TIFF related formatting to ensure the image is processed correctly for each scanline.
This image was a previous iteration of my species that I no longer use...because..I dont want to anymore.
I ended up setting the pixels at 1728 x 1100, using 96 DPI as the base dots in case if it were printed, and then imported into audacity at 2400 bits per second sampling rate --> Upsampled to 48 Khz, in which I then revealed the actual pulse train by distorting the track to reveal them.
I added a 1800 hz center carrier to form the PSK, and added a LPF of somewhere around 2500-3000 Hz, and a high pass filter of 1200 hz or something.
This in turn ended up almost sounding exactly like v.27ter, the first spec of modem protocol used for transmitting faxes over landlines.
The weird "data glitch", followed by what I refer to as the "burp sequence" during the end of this 5 minute recording, is the *metadata* (file data, etc), which is encoded last. Telephone lines rid of this metadata since the image was originally printed, then scanned...TIFFs have this additional metadata, so this way the file has proof of it being a file instead of only a raw copy.
I also do Digital signal processing with various synthesizing methods such as FM AM LSB USB, etc.
One of the things I was able to achieve, specifically in audacity and krita, was encoding such a signal that could be used on the old landlines, from an old image I had on my system.
The actual encoding of the image (in case tech is concerned), uses the same parameters as what a traditional page of fax would be encoded on the landline, at 2400 bits per second PSK.
I exported the image as a TIFF, not a JPEG, because standards usually say that older fax machines use modified huffman parameters with TIFF related formatting to ensure the image is processed correctly for each scanline.
This image was a previous iteration of my species that I no longer use...because..I dont want to anymore.
I ended up setting the pixels at 1728 x 1100, using 96 DPI as the base dots in case if it were printed, and then imported into audacity at 2400 bits per second sampling rate --> Upsampled to 48 Khz, in which I then revealed the actual pulse train by distorting the track to reveal them.
I added a 1800 hz center carrier to form the PSK, and added a LPF of somewhere around 2500-3000 Hz, and a high pass filter of 1200 hz or something.
This in turn ended up almost sounding exactly like v.27ter, the first spec of modem protocol used for transmitting faxes over landlines.
The weird "data glitch", followed by what I refer to as the "burp sequence" during the end of this 5 minute recording, is the *metadata* (file data, etc), which is encoded last. Telephone lines rid of this metadata since the image was originally printed, then scanned...TIFFs have this additional metadata, so this way the file has proof of it being a file instead of only a raw copy.
Category Music / All
Species Unspecified / Any
Size 50 x 50px
File Size 2.45 MB
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