I had probed the part with both Windows and Linux, but I did not know about this utility. Thank you for the lead. When I probe it with my Linux system using lsusb I get "Jieli Technology USB Composite Device" I went to the ZhuHai Jieli Technology Co.,Ltd (杰理芯片) website and looked for the chip. They have a page when translated labeled "Mixer/live sound card series chips." However, all of the chip numbers listed are for Bluetooth chips, not USB-Audio chips. ZhuHai Jieli Technology Co.,Ltd (杰理芯片) is the manufacturer of the USB-audio interface chip, but I have not yet been able to locate the part number.
Thanks for the extremely detailed review and measurements! Is there some ways to improve Q-12? Will swapping resistors to 6.8 kOhm improve 48V phantom power? Please consider to do a video of fixing/upgrading the Teyun Q-12.
It is interesting though their bluetooth IC uses the same 24MHz clock. They make the AC1090/AC109N that looks similar but pinout not quite the same. Good teardown.
I get quite a lot of pops when I'm running this on my linux laptop on AC power, regardless of the buffer settings I use. No issue on battery power or when I'm using it with my desktop. I would blame the laptop's power circuitry but it has no issues running my other audio interfaces, even ones based around the same PCM2902 IC, so I'm guessing the Q-12 is just more sensitive to any power issues the laptop has. I notice the same popping on some other reviews for the Q-12 (the same popping/clicking can be heard in Dave Soltura's videos on the thing) so I don't think I have a defective one either. Any ideas what would be making it more sensitive to unstable (or unfiltered maybe) USB power? Any cheap fix ideas? Also regarding your gain issues, on my unit pressing the REC button down allows that third pot (the red 'MAIN' one) to control volume of the audio coming through over USB. Is this not the case for you? In your other video you say it does absolutely nothing for audio going to the ADC but maybe that got changed in later revisions, but from the text on the button it seems it'd function the same way.
@@jazznelsalica2275 If you just want to use it as a mixer you can plug the usb cable into a 5V charger or battery pack instead of powering it from a computer.
I wanted to like this unit but unfortunately it failed simple testing. I just wanted it to power a Dayton EMM-6 Condenser Mic for car audio tuning. I did not get consistent measurements with an RTA. Th mic would start out fine but the lower frequencies just dropped off. Couldn't explain it. I measured phantom power at 39vdc. I think that should be sufficient but maybe not. I know the mic is solid on another Behringer UMC22 that I borrowed.
@@Chris_Grossman Actually there's no setting for that as it seems hardwired into the device , but thanks to your video I figured pin 39 MSEL (Mixer) if set to Low would turn off Direct monitoring , is that true ?
Try lsusb to see what it identifies the chip as.
I had probed the part with both Windows and Linux, but I did not know about this utility. Thank you for the lead.
When I probe it with my Linux system using lsusb I get "Jieli Technology USB Composite Device"
I went to the ZhuHai Jieli Technology Co.,Ltd (杰理芯片) website and looked for the chip. They have a page when translated labeled "Mixer/live sound card series chips." However, all of the chip numbers listed are for Bluetooth chips, not USB-Audio chips.
ZhuHai Jieli Technology Co.,Ltd (杰理芯片) is the manufacturer of the USB-audio interface chip, but I have not yet been able to locate the part number.
You’re a great teacher. It feels like we were the students yesterday.
It would be nic eto see you shield the plastic case with aluminum foil and glue to mitigate EMI. I'll do this on mine.
this is really fantastic for the price i only paid 10$ for it and all i can say is worth every penny.
Thanks for the extremely detailed review and measurements! Is there some ways to improve Q-12? Will swapping resistors to 6.8 kOhm improve 48V phantom power? Please consider to do a video of fixing/upgrading the Teyun Q-12.
Would it make sense to replace one of the mic preamp UTC4580's by an AD712 - for lower noise?
It is interesting though their bluetooth IC uses the same 24MHz clock. They make the AC1090/AC109N that looks similar but pinout not quite the same.
Good teardown.
We should build a dual xlr input for a computer.
I get quite a lot of pops when I'm running this on my linux laptop on AC power, regardless of the buffer settings I use. No issue on battery power or when I'm using it with my desktop.
I would blame the laptop's power circuitry but it has no issues running my other audio interfaces, even ones based around the same PCM2902 IC, so I'm guessing the Q-12 is just more sensitive to any power issues the laptop has. I notice the same popping on some other reviews for the Q-12 (the same popping/clicking can be heard in Dave Soltura's videos on the thing) so I don't think I have a defective one either. Any ideas what would be making it more sensitive to unstable (or unfiltered maybe) USB power? Any cheap fix ideas?
Also regarding your gain issues, on my unit pressing the REC button down allows that third pot (the red 'MAIN' one) to control volume of the audio coming through over USB. Is this not the case for you? In your other video you say it does absolutely nothing for audio going to the ADC but maybe that got changed in later revisions, but from the text on the button it seems it'd function the same way.
hi, do you have any idea on what audio chip it uses?
can it powered by a 5v charger or it needed PC to powered up? i order these and this video has awesome detail about teyun
@@jazznelsalica2275 If you just want to use it as a mixer you can plug the usb cable into a 5V charger or battery pack instead of powering it from a computer.
I wanted to like this unit but unfortunately it failed simple testing. I just wanted it to power a Dayton EMM-6 Condenser Mic for car audio tuning. I did not get consistent measurements with an RTA. Th mic would start out fine but the lower frequencies just dropped off. Couldn't explain it. I measured phantom power at 39vdc. I think that should be sufficient but maybe not. I know the mic is solid on another Behringer UMC22 that I borrowed.
My measurements showed the phantom power was inadequate and essentially unusable, so it is not surprising you had problems.
is it delay signal output or not?
Suppose we wanna add a switch to turn off direct monitoring , where would it be located ? Thanks 4 the video.
You would need to do that in your pc and set something besides the teyun as the output device.
@@Chris_Grossman Actually there's no setting for that as it seems hardwired into the device , but thanks to your video I figured pin 39 MSEL (Mixer) if set to Low would turn off Direct monitoring , is that true ?