yes, with Windows 10 Pro running I plug in the USB data cable from the Tone 2 into my laptop and the khadas Tone 2 driver does not appear in the Windows Sound window; but if I then unplug it from the laptop and then plug it back in, the driver then appears and works as the default sound device.
I can then switch on external power, if I want.
I have tried reinstalling the driver, asking Windows to rescan the USB and sound devices, changing the sleep settings for USB under power management and general fiddling around in Windows.
But it is not a great issue, just strange.
I found the same issue even with the old FW. I think its not the T2pro device, moreover to your personal laptop/computer and the usb-c cable that you are using. Some usb ports are unable to provide the necessary juice to power on the device appropriately, that is why when you use external power - all is fine.
I have an old hp elite book 1030 gen1 - the t2pro is only working with one specific usb cable and only when connected to the always-on-usb port, the one port that is suitable for charging - 1A and 5V usb port.
On my other laptop - hp elite book 745 g5 - the tone2pro is working perfectly fine on every usb port.
I have also tried to connect the vim3l device with the t2pro but the vim was unable to recognize the tone only via the data cable. Maybe doing something wrong, but never dig into that anyway…
I think my issue is a Windows/old Acer laptop thing.
I found that it only happens after the laptop has been on for a while and has dropped off to sleep; once it comes back on I need to insert the USB cable to wake up USB and again to load the driver.
Not much of a problem and a Windows feature perhaps.
You can stop and disable hibernate if you dont use it. This will also free some disk space from your system drive. From elevated cmd type powercfg.exe /h off . Also you can configure power options for the usb controller to never turn off the device to save power - you can do that from device manager.
I have a Tone2 Pro version 1.20 from factory. In order to upgrade the firmware to version 1.30, do I follow the steps on the video (linux tutorial) starting from “Update the XMOS Firmware” onwards (link)? Therefore I don’t need any tool or even to follow the steps to update the MCU, correct?
A few days ago i successfully upgraded my Tone2 to Firmware v1.30.Love that little DAC by the way
Before the new firmware I mainly used the Low Gain Mode for my headphones (HD 660s + balanced cable). Some HiRes tracks on Tidal were recorded in a lower volume so I had to adjust to maximum volume in low gain mode or to switch to high gain mode.
Now to my understanding - with the new preamp mode is there a smooth transition between low and high gain to achieve higher volume ? If I switch to preamp mode and use my headphones I have enough reserves to increase the volume. I would prefer this mode as opposed to low gain or high gain and switch between these two.
Are there any reasons against it or is this mode not intended for headphones?
I found a, unexpected change from firmware 1.2 to 1.3 : I have some MQA files that I was able to read from Roon (no change) or even from Foobar, as it was sending it unprocessed to the Tone2 Pro, and the processing was then done by the Tone2 Pro (Green or Blue light on the device).
Now, since firmware 1.3, the Tone2 Pro recognize these files as standard PCM and does not process. The light stays Yellow.
From my understanding, the pre-amp mode enables “digital volume control” which then allows the volume knob to control the volume level of the RCA outputs. You are getting a “smooth transition” because the volume is being adjusted digitally, rather than a hardware change through the amplifier gain. Audio-purists will prefer to turn-off digital volume control, and rely purely on hardware gain.
Perhaps @Eric68 can check my understanding of this matter.
Audio-purists will prefer to turn-off digital volume control, and rely purely on hardware gain.
I believe so!
I will test high gain vs Digital Volume control but i think i will hardly hear any difference…
Do i have to use the special Khadas balanced RCA cable to connect the RCA ports to my receiver ? Or can i just use normal RCA cables for that ? My receiver does not have balanced input.
This should work. Ensure that your VIM3L is receiving sufficient power via the USB-C port (don’t power it with your computer’s USB port). Or connect additional power to your Tone2 Pro via the USB-C port labelled “I2S”.