Products > Test Equipment
Audio via Sound Card Line In and Spectrum Analyzer
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radiolistener:

--- Quote from: kirk spec on July 12, 2023, 10:45:50 am ---It looks like the E1DA Cosmos ADC are already sold out everywhere?

https://www.linsoul.com/products/e1da-cosmos-adc?variant=42117413142745

They discontinued it somehow? Why?

--- End quote ---

Manufacturing such devices is expensive and complicated, it requires manually tested expensive ADC chips which is hard to buy. It's more easy to sell cheap Chinese crap... :)


But you can try Chinese version: https://www.aliexpress.com/item/1005003798311819.html
Fungus:

--- Quote from: kirk spec on July 12, 2023, 09:47:00 am ---Why didn't you guys get the E1DA Cosmos ADC? How does it differ to a sound card?

--- End quote ---

The connectors on the front.

The "ADC" part will be the same.
Grandchuck:
https://www.eevblog.com/forum/beginners/is-this-a-valid-way-to-measure-thd/msg4951651/#msg4951651
dobsonr741:

--- Quote --- I can get output in real time with the real time input, right?
--- End quote ---

Any sound input/output on the PC will be real time - they are streams of data with a few millisecond latency.

Any good spectrum analysis software will take your real time audio stream, take out the FFT buffer size chunks, do the analysis and refresh your screen. 64K buffer size with 48KHz sample rate it will refresh your display every 1.36 seconds. It’s up to you to define sampling rate and buffer size for the analysis.
kirk spec:
This is the E1DA Cosmos ADC noise floor

https://linustechtips.com/topic/1400393-e1da-cosmos-adc-noise-floor/



What free software can display that too so I can try my notebook internal audio ADC. I tried it on my android cell phone. It needed to have the microphone recording on before the Spectroid app would even run. In the PC/Windows. Do you also need the input on to run it? but the noise floor above was with the input all off. Please give example what  you do to get the noise floor in your PC, and the software  you used. Ty.
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