Instructables

Step 8: Future Work

Picture of Future Work
We're currently trying to upgrade our computer setup so that we will be able to print out files larger than 250MB.  Eventually I'd like to actually print physical copies of some of the files that I posted in the last step.  I'm also interested in hearing how the resolution difference between the outer and inner grooves of the record (explained in step 2) manifest themselves in the audio output.

Soon I'd also like to experiment with some more creative applications of this technology.  For example, printing out a record with many adjacent closed loops of ~2second looping samples.  This way you could set your needle down in one groove and listen to a loop repeat over and over, then tap the needle to the side to switch to another loop.  Assuming all the the loops have a similar time signature, you could turn this record into a cool, interactive sample mixer.

I'm currently working on another project that takes audio data and outputs a vector cutting path in the shape of a record (pictured above).  I'm planning on cutting this record with a laser cutter on acrylic.  Unfortunately, we've been having some trouble with our lasers recently, but I hope to get the project up in the first few weeks of January, as I have most of the code done.  I'm excited about this project because it has the potential to be a lot more useful to ordinary(ish) people.  The vector files are much easier and faster to generate, and the whole process uses cheaper materials and tools that a decent amount of people have access to these days.  I still haven't done enough testing to say how it will compare to my 3D printed record, but I'm fairly confident it will work.
NoPegs1 year ago
I am thrilled at your enthusiasm and technical know-how. But I couldn't help but notice you don't seem to be aware of how phonographs apply the RIAA equalization curve to the signal prior to amplification. This would explain why you get so much Bass and nearly no Treble. (IMHO you haven't yet hit the physical printing resolution barrier yet.) You should try applying the inverse RIAA emphasis curve to your audio data prior to your current processing steps and see how it goes, this way when played back the deck itself will apply the RIAA emphasis to your "pre-de-emphasized" signal and hopefully the result is increased fidelity.
This is really awesome.

BTW, the process of turning up the gain without clipping is called "compression" or "companding" and you should use it instead of just turning up the gain and then clipping. You can use a Volume Maximizer plug-in or a compressor followed by a limiter. See http://en.wikipedia.org/wiki/Companding and http://gottagrooverecords.com/vinyl-mastering/

Again, awesome! My MakerBot has some catching up to do.
RDalenberg1 year ago
Excellent documentation. I can see your work being applied to the surface texture of other printed objects. Have you considered using a laser to READ the texture? I imagine a cheep laser scanner reading an object with printed 2d barcodes and audio data embedded in the surface texture.
braxtron1 year ago
Probably the first time I read through an entire instructable out of fascination, cool project! I've been working with audio myself lately (attempting an analog vocoder), so your insight is appreciated. I'm excited for the laser version of this project, that's something I actually have access to!
poulps1 year ago
Congratulations. Good job!
Very interesting project. Thank you for share with us!