I finally got my digital oscilloscope chops back (it has been a while). CCRMA’s “Max Lab" (named after the late professor and electronic music pioneer Max Mathews) is equipped with quite a few analog and digital scopes. I’ve learned to use the Tektronix TDS 2004B, which has a lot of nice features and can work with four channels of data at a time. It can also export 2500 data points (at a staggering array of timing resolutions) to a comma-delimited CSV file. I’m really happy that I got everything working in just a day, and that we have access to such a great lab, this will be an important tool for quite a few of my research projects.
I started off measuring some of the envelope signals from my Casio SK-1. I’m doing some modeling work on the “Pitch/Envelope Mixing Circuit,” and have been wondering about the exact nature of the envelope signals. Above, see the default envelope signal for the piano sound (the photo) and “envelope 1” (the scope dump).