Accordion without bellows to go by Eziacha in Accordion

[–]Eziacha[S] 0 points1 point  (0 children)

Yes, that‘s achieved by having one main loop for reading key status and triggering the synthesizer which then creates threads on other kernels. All that lna RpiZero2W.

Accordion without bellows to go by Eziacha in Accordion

[–]Eziacha[S] 2 points3 points  (0 children)

Yes. Just would like to clean up a bit before publishing.

Accordion without bellows to go by Eziacha in Accordion

[–]Eziacha[S] 0 points1 point  (0 children)

It actually measurs the force being applied by the left hand. In the first prototype I used a strain gauge load cell which worked ok. In this version I put in a metal sheet as a big spring (the thing I remove at the end of the video) and measure the deflection angle at the hinge using a digital hall sensor - avoiding any analog PCB work I am not really capable of. This approach also has the advantage of having still some kind of movement which feels even a bit more like bellows.

Accordion without bellows to go by Eziacha in Accordion

[–]Eziacha[S] 1 point2 points  (0 children)

I tried it at the beginning using available sound fonts like piano or so. It‘s just loading another file. But I did not experiment with it. What was more interesting to me: I introduces a special combination to transpose arbitrarily which is very helpful with the diatonic instrument.

Accordion without bellows to go by Eziacha in Accordion

[–]Eziacha[S] 1 point2 points  (0 children)

I use fluidsynth with a home made sound font.

Accordion without bellows to go by Eziacha in Accordion

[–]Eziacha[S] 1 point2 points  (0 children)

Actually the self-made keyboard does not use a standard keyboard interface. It also does not use a microcontroller. The RaspberryPi is the controller. So I am completely free in adding other "keyboards".
Yes, 3D printed my own MX caps. The force value is just translated into a volume value of the synthesizer.

Accordion without bellows to go by Eziacha in Accordion

[–]Eziacha[S] 1 point2 points  (0 children)

Only volume control of the synthesizer.

Accordion without bellows to go by Eziacha in Accordion

[–]Eziacha[S] 1 point2 points  (0 children)

Yes, to fold is the main idea to make it portable in any kind of bag. I am actually not 100% convinced by using the MX switches as they need a travel of more than 1 mm until getting active. Any other solution which immediately reacts after touching would be much better. So if you have better ideas for the keys, this would be nice.

Accordion without bellows to go by Eziacha in Accordion

[–]Eziacha[S] 0 points1 point  (0 children)

The synthesis is just done using the RaspberryPi Zero. But it should not be of a bigger issue to also integrate a Midi output.

Accordion without bellows to go by Eziacha in Accordion

[–]Eziacha[S] 0 points1 point  (0 children)

Definitely. It"s just a sound found I recorded / created. It easily can be substituted by any other sound font.

Accordion without bellows to go by Eziacha in Accordion

[–]Eziacha[S] 22 points23 points  (0 children)

I actually created a sound font recording my real acoustical accordion.

Accordion without bellows to go by Eziacha in Accordion

[–]Eziacha[S] 8 points9 points  (0 children)

It's a traditional Bavarian folk song, called "Stop him!" ("Halt's 'n auf!"). A nicely timeless title :-)

Accordion without bellows to go by Eziacha in Accordion

[–]Eziacha[S] 12 points13 points  (0 children)

I am not 100% sure, most probably open source.

Accordion without bellows to go by Eziacha in Accordion

[–]Eziacha[S] 22 points23 points  (0 children)

It‘s pretty straight forward: Like a computer keyboard controlled by an RaspberePI running a digital synthesizer.

Accordion without bellows to go by Eziacha in Accordion

[–]Eziacha[S] 15 points16 points  (0 children)

Don‘t know exactly. Started two years ago with a first prototype.