I had the chance of making one in Oct 2021 following Javier's advices on his docs. This was a lot of fun. I printed the 3 required parts on my Prusa MK3S 3D printer. Perfect at the first attempt. I learned how to weld, not so difficult and I could make it also at first attempt. The MPXV7007DP component was indeed difficult to find at that time, but I could find one at Farnell for 18€ (and Digi-Key at 19€). It seems it's still difficult and expensive to find at the moment (but available at about 25€). The result is very nice. The sound also very good with most of the effects you can have on a real sax. And I love the geek look of this sax.
Show HN: Haxophone
71–76 of 76 posts
Re: Show HN: Haxophone
#72Earlier quoted context omitted.
Before I’d do any of that would be vibrato. Without it it is a emotionless keyboard with a blowtube.
I don't know. Looks kinda easy to do vibrato through your blowtube https://www.youtube.com/watch?v=XtsZZKZcNC4
It's tremolo, vibrato would be oscillating pitch. Real woodwinds can do both. And yes, Fender got them the wrong way.
Re: Show HN: Haxophone
#73Somewhat related, this guy is making a lot of cool instruments that looks reasonably easy to build https://www.youtube.com/c/NicolasBras
Re: Show HN: Haxophone
#74Re: Show HN: Haxophone
#75Earlier quoted context omitted.
There exist analog keyswitches, have you considered playing with those?
I'm really interested in this idea for other DIY instrument purposes. Razer has keyboards with optical ones, and some people have made them by putting inductive sensors underneath mechanical switches, but I couldn't find any analog keyswitches for sale. Do you have some examples? How can you deal with a large number of analog inputs to a Raspberry Pi or similar?
I don't remember how many analog input pins exist but a separate circuit that digitizes many analog inputs to a serial stream would be how I'd do it, personally.
Re: Show HN: Haxophone
#76Earlier quoted context omitted.
Yeah and is the pressure sensor closed so you're actually not blowing but just increasing and decreasing pressure?
No, not really. There is sensing tube (which terminates on the sensor) and a venting tube (which lets the air flow through). This is the same technique used in other similar commercial instruments. You can see both tubes in the assembly instructions: https://github.com/jcard0na/haxo-hw/blob/main/docs/assembly....
Ahh that makes sense! So is this actually sensing a lower pressure than ambient? Since moving air results in lower pressure?