<div dir="ltr">$9 on Amazon.. And it has a "picture" of the circuit board in the images.</div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Thu, Nov 17, 2022 at 3:30 PM cheater cheater via Synth-diy <<a href="mailto:synth-diy@synth-diy.org">synth-diy@synth-diy.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Yep, there are ones with codecs in them. You probably want /an even<br>
cheaper one/. Which exact one did you get? How much was it?<br>
<br>
The cheapest ones might be the passive ones - but who knows. You can<br>
find a schematic in appendix A of the doc that Chromatest posted. It's<br>
on page 312. The next page has a schematic of that + a charger input<br>
port.<br>
<br>
The page 312 schematic only has the usb c plug / port, the 1/8" jack<br>
with a plug-present switch, and wires. That's it. You can build it<br>
yourself quite easily either by cutting off a usb c cable, or by<br>
getting a usb c breakout pcb.<br>
<br>
<br>
On Thu, Nov 17, 2022 at 11:23 PM Eric Brombaugh via Synth-diy<br>
<<a href="mailto:synth-diy@synth-diy.org" target="_blank">synth-diy@synth-diy.org</a>> wrote:<br>
><br>
> I bought one of those cheap USB C headset adapters as an experiment to<br>
> see how well they work.<br>
><br>
> <a href="https://www.amazon.com/gp/product/B07XYQ2ZKH" rel="noreferrer" target="_blank">https://www.amazon.com/gp/product/B07XYQ2ZKH</a><br>
><br>
> Physically it's tiny - barely larger than the USB and 3.5mm connectors<br>
> (plus short cable between them). Tried it out and it worked well, but<br>
> then as I dug deeper it turns out that it's *not* passive - it actually<br>
> has a full codec + amps inside. Plugging it in enumerates a device on<br>
> the bus that's unrelated to my laptop's built-in audio:<br>
><br>
> ID 0572:1b09 Conexant Systems (Rockwell), Inc. Hi-Res Audio<br>
><br>
> Amazing.<br>
><br>
> On 11/17/22 02:31, cheater cheater via Synth-diy wrote:<br>
> > If you go to amazon, you'll find nearly infinite USB C to headset<br>
> > adapters following this standard, and they're as cheap as 4 euro.<br>
> > They'll probably work well, too - even the worst C plugs I've<br>
> > encountered on cheap cables are still very resilient. The mini jack on<br>
> > the other hand, I mean who knows, but it'll probably take a bunch of<br>
> > cycles. The more expensive ones are up to 10 euro, but not more.<br>
> ><br>
> > On Thu, Nov 17, 2022 at 10:25 AM cheater cheater<br>
> > <<a href="mailto:cheater00social@gmail.com" target="_blank">cheater00social@gmail.com</a>> wrote:<br>
> >><br>
> >> Thanks for the pointer to the spec. Appendix A talks about passive<br>
> >> audio adapters from USB C to headset TRRS. That includes both input<br>
> >> and output analog signals on the pins of a USB C port.<br>
> >><br>
> >> Glad that you linked me to the pdf, the last time I tried searching<br>
> >> for USB specs I found something completely different and it didn't<br>
> >> answer my question.<br>
> >><br>
> >> On Tue, Nov 15, 2022 at 9:23 PM Chromatest J. Pantsmaker<br>
> >> <<a href="mailto:chromatest@azburners.org" target="_blank">chromatest@azburners.org</a>> wrote:<br>
> >>><br>
> >>> "NOTE: Adopters may only use the USB Type-C® cable and connector to implement USB or third party functionality as expressly described in this Specification; all other uses are prohibited."<br>
> >>> From:<br>
> >>> <a href="https://www.usb.org/sites/default/files/USB%20Type-C%20Spec%20R2.0%20-%20August%202019.pdf" rel="noreferrer" target="_blank">https://www.usb.org/sites/default/files/USB%20Type-C%20Spec%20R2.0%20-%20August%202019.pdf</a><br>
> >>><br>
> >>><br>
> >>> On Tue, Nov 15, 2022 at 11:08 AM cheater cheater via Synth-diy <<a href="mailto:synth-diy@synth-diy.org" target="_blank">synth-diy@synth-diy.org</a>> wrote:<br>
> >>>><br>
> >>>> As in subject. Is there anything in the spec that speaks against this?<br>
> >>>> Where would one go in order to get a definitive answer to this?<br>
> >>>> _______________________________________________<br>
> >>>> Synth-diy mailing list<br>
> >>>> <a href="mailto:Synth-diy@synth-diy.org" target="_blank">Synth-diy@synth-diy.org</a><br>
> >>>> <a href="http://synth-diy.org/mailman/listinfo/synth-diy" rel="noreferrer" target="_blank">http://synth-diy.org/mailman/listinfo/synth-diy</a><br>
> >>>> Selling or trading? Use <a href="mailto:marketplace@synth-diy.org" target="_blank">marketplace@synth-diy.org</a><br>
> ><br>
> > _______________________________________________<br>
> > Synth-diy mailing list<br>
> > <a href="mailto:Synth-diy@synth-diy.org" target="_blank">Synth-diy@synth-diy.org</a><br>
> > <a href="http://synth-diy.org/mailman/listinfo/synth-diy" rel="noreferrer" target="_blank">http://synth-diy.org/mailman/listinfo/synth-diy</a><br>
> > Selling or trading? Use <a href="mailto:marketplace@synth-diy.org" target="_blank">marketplace@synth-diy.org</a><br>
> _______________________________________________<br>
> Synth-diy mailing list<br>
> <a href="mailto:Synth-diy@synth-diy.org" target="_blank">Synth-diy@synth-diy.org</a><br>
> <a href="http://synth-diy.org/mailman/listinfo/synth-diy" rel="noreferrer" target="_blank">http://synth-diy.org/mailman/listinfo/synth-diy</a><br>
> Selling or trading? Use <a href="mailto:marketplace@synth-diy.org" target="_blank">marketplace@synth-diy.org</a><br>
<br>
_______________________________________________<br>
Synth-diy mailing list<br>
<a href="mailto:Synth-diy@synth-diy.org" target="_blank">Synth-diy@synth-diy.org</a><br>
<a href="http://synth-diy.org/mailman/listinfo/synth-diy" rel="noreferrer" target="_blank">http://synth-diy.org/mailman/listinfo/synth-diy</a><br>
Selling or trading? Use <a href="mailto:marketplace@synth-diy.org" target="_blank">marketplace@synth-diy.org</a><br>
</blockquote></div>