How many here own at least one oscilloscope for DIY audio work or even just electronics in general? Here's mine, a GW Instek GDS-1062A that I originally bought for working on college projects 7 years ago. The EEVblog box is an isolated high voltage probe, which I was testing its high frequency...

I have had mine for a week or two. Sound quality does seem to be a little better than the Piston 3, as in sounding a bit clearer. The vent cover mod can also be applied to the Piston 3, but in both cases just taping over it made the IEMs exhibit uncomfortable pressure when inserting or removing...

I got a cheap USB-C hub off Amazon and it works to connect both a pair of headphones and a USB drive to the Le Pro 3 at the same time. Unfortunately, a design flaw causes it to fail USB-C specification, so I cannot recommend it.

Quote: They work by means of a DC/DC converter to generate a negative rail, often integrated directly into the amplifier chip. https://www.maximintegrated.com/en/products/analog/audio/MAX97200.html Note that they still need a few external caps for the DC/DC converter. That chip is notable...

If it's something about exFAT or NTFS patent rubbish, couldn't the device refuse to mount the card and instead ask the user to reformat it so it can be used by the device? (On a side note, NTFS and especially exFAT are garbage performance wise compared to ext4.)   The 3.5mm jack, with its need...

No SD card slot and no verified way to get audio output and charge at the same time are what I consider the main drawbacks. But a lot of phones nowadays do not have a SD card slot, which is kind of sad. I do not know why the manufacturers haven't realized how silly it is to not have a SD card...

The USB-C headphones and USB-C to 3.5mm converter supplied with the Le Pro 3.

Found out that one of my coworkers recently got a Pixel so I arranged for a little time to check if the LeEco stock USB-C DACs will work with it. The answer is yes, confirming that CDLA is basically just USB 2.0 audio. What we need is a list of USB-C hubs that have been confirmed to be able...

From what I could tell, CDLA is just marketing for USB 2.0 audio over USB-C. I think the move to digital output is good, but not without snags. The cost/availability of adapters for legacy hardware is the most obvious one. Another is charging the device and outputting audio at the same time.  ...

In summary, it works very well with IEMs. Even the rather demanding Klipsch S3 is handled with no problems. Plenty of volume and very clear with great detail. There is Dolby Atmos, which you can turn on and off as you desire. (The frequency response is quite flat with it off.) The following is a...

The stock DAC didn't exhibit any audible noise when playing a blank track and a very minor, almost unnoticeable glitch on plug in. (Note that applies if you plug the headphones into the DAC and then plug the DAC into the phone. If you plug the DAC into the phone first, there would be a much...

They both seem to use the same chip or at least they have the same VID/PID.   I certainly wasn't expecting it to hold up that well against the OpenDAC HD (PCM1792A+OPA1612+TPA6120A2), but Delta Sigma is truly amazing technology. I speculate that inside the "DAC", they have a DC/DC converter...

It identifies as "LeTV LeEco_CDLA_DH1" with a VID of 0x262A and a PID of 0x1534. Looking into it, it seems to be a Saviaudio chip.   Here's what the USB Device Info app shows:

The Le Pro 3 and Le S3 fully support AT&T and T-Mobile in the US. If you're on either of those carriers or a MVNO that piggybacks on either one, you won't miss a thing. Both the Le Pro 3 and the Le S3 (and all other LeEco phones without headphone jacks) use a USB 2.0 DAC and allow the user...

I recently tore down an Echo Dot.   Notable is that it uses a TLV320DAC3203 I2S DAC. That means a digital out mod should be possible, but I'm not looking further at this point since I have some other projects to work on.

Definitely unbeatable for the price point. I don't have any other high end smartphone to compare against, but (its included stock DAC) being so close to the OpenDAC HD for audio quality is something I did not expect.   I could not find a reputable source for the stock DAC by itself, only the...

It's some unidentified (but very good) USB 2.0 chip inside the stock USB-C DAC. VID is 0x262A and PID is 0x1534.

You can also take a look at the $300 Le Pro 3 and the $150 Le S3. Both come with USB-C DACs that I tested (with scope trace) a few posts back.

Just got a USB host adapter for my Pro 3 so I could do some comparisons.   Subjectively, the stock 3.5mm DAC is way better than the PCM2707 DAC I built a long time ago. In fact, it is almost as good as my OpenDAC HD! (All three DACs were driven from the Pro 3, with the OpenDAC HD connected via...

The Pro 3 itself only has digital output via USB-C. As for the stock headphones, they sound OK but can't compare to Xiaomi. The 3.5mm DAC is about on par with a $50 sound card as mentioned earlier. I can't do a direct comparison against my OpenDAC HD since I currently do not have a way to...

I recently got the Le Pro 3 and it actually includes two USB-C DACs in the box. One is built into the stock headphones and another to use your existing 3.5mm headphones with. They seem to be pretty decent, about on par with a $50 sound card. I think it's only a matter of time before even better...

Watch an antique cell phone turn into a Galaxy in the middle of the video! https://www.youtube.com/watch?v=uV2uebhnqOw

The first generation Pi had a different pinout for I2S. Therefore, the first one you listed may need modifications. The second one is not a plug in board and should work just fine.

That looks like it was designed for the first generation Raspberry Pis and might not work with modern ones.

You'll want to use a lower resistance potentiometer. If you used 10k, you'll find very little volume over most of the range and a very steep transition to full volume near the top.   Additionally, common "log" potentiometers are not very log. You'll do better with a linear potentiometer and a...