Teenage Engineering's PO-32 acoustic modem and synth implementation
1–10 of 37 posts
Re: Teenage Engineering's PO-32 acoustic modem and synth implementation
#2That's amazing. I wonder how accurate is the synth engine?
Re: Teenage Engineering's PO-32 acoustic modem and synth implementation
#3> The PO-32 is not receiving finished drum audio when you transfer a sound or a pattern. It receives structured data:
Wait, isn't this what MIDI is for?
Re: Teenage Engineering's PO-32 acoustic modem and synth implementation
#4> The PO-32 is not receiving finished drum audio when you transfer a sound or a pattern. It receives structured data: Wait, isn't this what MIDI is for?
Sure, but being able to share the 'data dump' at the end of a Youtube Video is so much more fun/likely to be used.
Re: Teenage Engineering's PO-32 acoustic modem and synth implementation
#5> The PO-32 is not receiving finished drum audio when you transfer a sound or a pattern. It receives structured data: Wait, isn't this what MIDI is for?
All it means is that the PO-32 is not a sampler, it's a synthesizer, so it receives a "preset" for the synth rather than an audio sample.
Re: Teenage Engineering's PO-32 acoustic modem and synth implementation
#6This reminded me of when people used to transfer games over the radio: https://www.racunalniski-muzej.si/en/40-years-later-a-game-f...
Re: Teenage Engineering's PO-32 acoustic modem and synth implementation
#7Hey ericlewis - this is cool! Can I ask how you figured it out?!
Doing this for my PO-33 was on my bucket list.
I thought I might have to resort to voltage glitching to get a firmware dump, which is currently beyond my skills.
Re: Teenage Engineering's PO-32 acoustic modem and synth implementation
#8That's amazing. I wonder how accurate is the synth engine?
The synth engine is an implementation of https://soniccharge.com/microtonic Not sure what "accurate" means in your context though?
Re: Teenage Engineering's PO-32 acoustic modem and synth implementation
#9> The PO-32 is not receiving finished drum audio when you transfer a sound or a pattern. It receives structured data: Wait, isn't this what MIDI is for?
It's sending sound parameter information (e.g. filter cutoff at 12khz, resonance at 1.6, Q of 0.89) along with note information (e.g. start playing note A4 with velocity 80). You could absolutely use a MIDI CC channel to convey this information. The OP-32 chooses a different route and encodes this into an audio signal so that it can transmit it over the air using the speaker/mic instead of a wireless stack.
I bet it sounds like a dial-up tone!
Re: Teenage Engineering's PO-32 acoustic modem and synth implementation
#10Digital modules from Mutable Instruments (and related clones + offshoots) use audio-based data transfer for firmware updates.
Interesting way to give the consumer the ability to change the firmware without having to access the back of the module (there's a way to use a serial JTAG adapter as well).
https://github.com/pichenettes/mutable-dev-environment?tab=r...