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It will be used to replace microphone parts, is there a vacuum tube with good specifications for low distortion? The existing vacuum tube is 6AU6.

It's sad to hear that failed. All the items I ordered have not arrived yet, so it will take some time to test them. I'm so busy with other things these days that I don't think I'll be able to do it until December 20th. I hope we succeed. I hope it can be a good Christmas gift.

First of all, I purchased all the boards I posted in the text. It's currently being delivered, but I'm going to test it when it arrives. First of all, I'm going to find out if it works without a separate MLCK line input.

The industry's best (accurate) comprehensive performance measurement is Earthworks' zero-distortion (ZDT) microphone-pre, and the second is Cranborn Audio's Camden mic-pre. I own a camden ec2 microphone pre-amplifier (2ch). Of course, it will be used with cosmos adc.

In the case of these products, a separate crystal oscillator can be installed on the board itself. Wouldn't it work as the board's own clock without additional MLCK wires to EXT_INPUT? https://ko.aliexpress.com/item/4000683083510.html?spm=a2g0o.cart.0.0.65b43c008CPtnJ&mp=1

I'm sure it depends on the situation, but I think the one I use the most is the 24-bit 48K sample rate (24/48).

Did you find a solution? I found a board with a separate MCLK. If you need it, please refer to it. https://ko.aliexpress.com/item/1005002446546826.html?spm=a2g0o.cart.0.0.65b43c008CPtnJ&mp=1 https://ko.aliexpress.com/item/4000683083510.html?spm=a2g0o.cart.0.0.65b43c008CPtnJ&mp=1

I think I finally found a board that can function as I want. What do you think? These two products appear to have separate MCLK on the board. https://ko.aliexpress.com/item/4000683083510.html?spm=a2g0o.cart.0.0.65b43c008CPtnJ&mp=1...

It's so hard... I want to print it as AES/EBU as the cosmos' performance, but I don't know how...

https://www.diyinhk.com/shop/audio-kits/175-xmos-multichannel-high-quality-usb-tofrom-i2sdsd-spdif-pcb.html#/xmos_firmware-384k_6ch_out_4ch_in_spdif_out/usb_cable-null/oled_panel-null/fifo_option-null/esd_protection-2kv/usb_socket-type_c_new_and_slim Do you think I can do the function I want...

That's amazing....

At first, I thought it'd be easy to solve, but it's getting harder and harder. LOL It would be great if the cosmos adc could only output AES so that it could be connected to the audio interface via digital input...

All I want to do is record it through cosmos ADC, and I want to extract the digital output with SPDIF, AES/EBU, or ADAT. In the case of the product you just uploaded, I wonder if the results I want will come out when I connect the pins on the left to the I2S pins on the PCB board of Cosmos adc...

Well, as far as I know, the cosmos ADC only works as a master for I2S output (not as a slave). Also, I heard that the I2S terminal of the PCB substrate can be used if you want a digital output in a different format and is output in parallel with the USB-C output of Cosmos adc.

I see... Then I think the best way to use I2S pins is for now. I need to study more.

cosmos ADC (out)-> USB-C (in)-> DDC ->(out) AES/EBU It was a question about whether this kind of signal flow would be possible.

Oh, you didn't see it because you needed to log in. That DDC receives USB input and outputs it in a different digital format. What I'm curious about is whether I can connect the USB-C output of the cosmos adc to DDC USB input and change it to the AES/EBU I want. It is.

It's hard... ㅜㅜ Thank you for the information. But let me ask you one more question. Cosmos adc has only one USB-C output, so can I convert it to the signal I need even if I connect USB with this DDC? I wonder if it's okay to connect to this DDC because the cosmos ADC operates with USB bus...

Let me take a slightly different perspective, but I want to use this cosmos adc for recording such as music production, not for measuring purposes.(Of course, we have separate microphone preamplifiers and audio interfaces.) Unfortunately, however, Cosmos has only one USB-C terminal, and the...