It sounds like what you expect, but it's a little bit off. So I recorded three separate tracks all just my computer's spitting out MIDI codes and wasn't playing it and just recorded it back in. You have a high melody, you have a mid level melody, and then you have the baseline that goes through there. But like the notes were sort of not aligning up very well. All the frequencies were on I had it tuned right. If you need to detect frequencies or whatever errors like it's just like a really it's like venchi on a 3d printer. And it's a pretty decent test as like a kind of like a benchmark, because it's just a bunch of square waves. But the thing that's great about Super Mario Brothers is everyone knows it, you know exactly what it should sound like. And and I want to make it clear that like, I'm not, I haven't made this musical instrument just to play like video game music. And of course, I go to Super Mario Brothers. And it's like a great, let's start doing some stuff with it. So I don't even have to have special circuitry, I have the Teensy coordinate connected directly to that. And that's more than enough to turn it on. And my envelope, it's supposed to receive as like a zero to 10 volt signal 10 Being on, but it's just a transistor base at the input. Yeah.Īnd that's, that's exactly what I'm doing on this. And it turns a pin low when it gets the note off command. It turns a pin high when it gets a note on command. I also have it have like, turn up in high and low. So above and beyond it having like a PWM voltage output. It's just like, reads USB and then does something. I've done it and let it run for like an hour and built the chip on the Teensy, and it doesn't really even get that hot. I mean, like, it's already 180 megahertz like, yeah, you kind of have to need to overclock it in order for it to do that. You just go up to like the tools thing and just say go fast, go faster. Especially because you can overclock it to 240 megahertz. But yep, this one is a bit more accurate and runs a lot faster. ![]() And now I can actually have my computer directly play my synth, similar to my old synth. I used the Teensies like built in Arduino library to sniff USB and get MIDI codes. So what I made was it was a teensy device that just PWM doubt, whatever voltage I wanted, because I just blow past it effectively added a little bit of gain such that my teensy was able to spit out a zero to 10 volt signal. That particular design is still kind of in the digital realm right now in terms of like, My computer has the design, I haven't actually ordered it, I did a stopgap design in a way that was just enough to keep me in between having like the monster device. Which we talked about a couple episodes ago. So above and beyond the synth design, I've been making a MIDI to CV converter. But today, I want to talk to you about an issue I had that was kind of interesting. So yeah, we'll be we'll be actually talking about the synthesizer proper in a future episode. So it's like nothing more electrical engineering has to happen to this it is done. That's the complete part that needs to finish. No complete as in like, the circuit does everything I want it to it just it the case comes in tomorrow. That's what I mean, all your projects are complete air quotes, Well, so that's actually complete, and I'm using air quotes. You've been working on a new synthesizer design. We are your host, Stephen CraigĪnd Parker Dolman. Hello, and welcome to the macro fab engineering podcast. It helps this show stay visible and helps new listeners find us. Visit our Slack Channel and join the conversation in between episodes and please review us, wherever you listen (PodcastAddict, iTunes). Get on our Slack channel and join the conversation!.Is coding required for Electrical Engineering?.PDF with good diagrams on how mSAP works. ![]()
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