Author Topic: Syntherrupter - A Feature-rich, Polyphonic Interrupter  (Read 7936 times)

Offline Max

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Re: Syntherrupter - A Feature-rich, Polyphonic Interrupter
« Reply #100 on: October 12, 2020, 03:47:24 PM »
As requested, Mads split this thread in two, removing AstRiis latest posts about his build. I'd ask you all to keep this thread focused on the development of Syntherrupter. Bugs, questions, features, etc.

Part of my response to AstRiis build was development related so I moved it back to here where it belongs:
I had (and have) not much time and most of it went into the wiki. However I did extend the Firmware Update Mode a bit. It is now a general purpose serial bridge. If you enter that mode, the Nextions RX/TX pins are connected straight to the USB serial port (through software though). So you can send anything you want, or debug it - whatever. Additionally the same thing can be done for the ESP. So you don‘t need a programmer for the ESP and can do it through Syntherrupter, too. Only downside: it won‘t reset automatically after a Nextion firmware update anymore. You have to do it manually but that‘s not a big issue I think. The passthrough mode works for any baud rate up to ~512kbaud/s.

The new wiki can be found here. Feedback is highly welcome as always!



Kind regards,
Max

Offline futurist

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Re: Syntherrupter - A Feature-rich, Polyphonic Interrupter
« Reply #101 on: October 12, 2020, 08:53:51 PM »
Short polyphony test - everything works great! Bad weather here for the second weekend so I can only play with small coil
It actually sounds much nicer in person, phone isn't suitable for recording such high volumes



< my new favorite DRSSTC midi






Sorry for vertical recording, this was a quick test. After 10 minutes of playing at full power secondary got pretty hot and I had to stop. Inverter and MMC barely warm, bus caps pretty hot
If I didn't mention before coil is powered with chinese 40N60 double half-bridge. It still needs tuning, otherwise my OCD LED will burn out. Settings are duty-limiter 15%, max. on-time 280 us

Online davekni

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Re: Syntherrupter - A Feature-rich, Polyphonic Interrupter
« Reply #102 on: October 12, 2020, 11:11:15 PM »
Sounds great!  Concerning sound recording quality, yes, in-person is always better.  For my video camera, the biggest issue isn't the high peak volume, but rather electric fields.  The build-in microphones are electret and poorly shielded.  Putting grounded aluminum-foil in front of the camera (with a hole for the lens) made a big improvement.
David Knierim

Offline AstRii

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Re: Syntherrupter - A Feature-rich, Polyphonic Interrupter
« Reply #103 on: October 12, 2020, 11:24:53 PM »
Here is some low power polyphony which sounds great in my opinion.


Offline Max

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Re: Syntherrupter - A Feature-rich, Polyphonic Interrupter
« Reply #104 on: October 14, 2020, 04:34:43 AM »
@futurist, @AstRii: Thank you for the videos! Nothing special but I liked how in AstRiis video at 02:12 the two voices sound completely independantly, as if they came from two individual coils.

New release! Among other things it includes dark mode! Remember to update the Nextion firmware before updating the Tiva firmware. This time it is particularly important.


Kind regards,
Max


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Re: Syntherrupter - A Feature-rich, Polyphonic Interrupter
« Reply #104 on: October 14, 2020, 04:34:43 AM »

 


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