Products > Test Equipment
Audio via Sound Card Line In and Spectrum Analyzer
<< < (8/10) > >>
Fungus:

--- Quote from: radiolistener on July 12, 2023, 03:39:34 pm ---usb output is a sign that microphone is not professional and has a bad sound quality

--- End quote ---

You mean like this one?

https://www.shure.com/en-US/products/microphones/mv7?variant=MV7-K
radiolistener:

--- Quote from: Fungus on July 12, 2023, 03:51:00 pm ---You mean like this one?

https://www.shure.com/en-US/products/microphones/mv7?variant=MV7-K

--- End quote ---

Yes, such kind of microphones are intended for these people who like how microphone looks and they don't take care about actual microphone performance specifications and sound quality... Different kind of bloggers, etc...  :)

You can find a lot of examples on aliexpress. For example:
https://www.aliexpress.com/item/1005005385033091.html
https://www.aliexpress.com/item/1005005145354029.html
radiolistener:
Looks like original E1DA store for Cosmos ADC on aliexpress:

https://www.aliexpress.com/item/1005003391728199.html
kirk spec:

I'm not sure of the source impedance because this would be related to singing auditions. I'm studying great singers voices for patterns in the spectrum analyzers. Whatever. I want to see for myself.

1. My Microsoft surface just doesn't have any line in. Also I bought a cheap USB sound stick before, I found out most usb sound module just doesn't have line in. Do you know what cheap USB stick has line in? While waiting for the legendary E1DA Cosmos ADC from china which can take months to arrive, I want to have a USB stick with Line In first.

2. Second. The E1DA Cosmos ADC has low input impedance. Let's say in the future I got source impedance that is very high. It can make the signal in the E1DA so low because of resistive dividing. Are there gadgets where you can decrease or adjust the source impedance to make it much lower so the signal to the E1DA won't be so degraded in magnitude?

3. If no cheap USB stick has Line In. I may just get the cheap (compared to the Behringer) M-Audio M-Track Solo first to try. The reason I mentioned cheap is because I can't get 2 $150 units (both Behringer and E1DA) as I need budget for other things. The temporary one has to be $50 or less. What do you think of the M-Audio M-Track Solo?
noisyee:

--- Quote from: kirk spec on July 12, 2023, 10:27:33 am ---And it's at $150. Why can't other sound cards more expensive match the spec?
And if you have Line Out already without needing any Mic preamp Why can't hobbyists use it as sound card/interface at all?

--- End quote ---

Cosmos ADC use a new released ESS ES9822, while other sound cards use very old AKM, CirrusLogic, or TI parts. It will take a long time for a new part to hit the market. Also the ES9822 is quite expensive, don't expect it appear on a cheap sound card.
Most hobbyists would use their sound card. Like I said, the Cosmos ADC is over killed for most application, so only those guys who are really serious about THD but can't afford the expensive Audio Precision would use Cosmos ADC.


--- Quote from: radiolistener on July 12, 2023, 10:55:17 am ---For example, if you don't expect very expensive top performance, Creative E-MU 1212M is a good working horse with 24-bit ADC.

--- End quote ---

Yes E-MU 1212M is a good alternative for a quite good performance without spending too much.


--- Quote from: kirk spec on July 12, 2023, 01:50:35 pm ---I know input and output impedance is important due to the idea of resistive divider where the larger value will receive more voltage. How do I measure the resistance above? Is it the ADC input impedance or is it the source impedance of the Line Out?

--- End quote ---

It's the Cosmos ADC input impedance. Due to it full differential amplifier input architecture, the input impedance is not high enough. It's a tradeoff between gain setting resistor and noise.


--- Quote from: radiolistener on July 12, 2023, 03:35:23 pm ---it depends on the sound card. Professional sound card can support ASIO drivers with low latency down to 2-3 ms. Usual PCI-E sound card has about 100-300 ms latency. Some cheap Chinese sound card can have up to several seconds latency

--- End quote ---

It also depends on hardware driver. Intel Ethernet card driver will cause a very high DPC Latency, a bug last for several years.
Use DPC Latency Checker to see if you are affected.


--- Quote from: kirk spec on July 12, 2023, 10:28:29 pm ---I'm not sure of the source impedance because this would be related to singing auditions. I'm studying great singers voices for patterns in the spectrum analyzers. Whatever. I want to see for myself.
1. My Microsoft surface just doesn't have any line in. Also I bought a cheap USB sound stick before, I found out most usb sound module just doesn't have line in. Do you know what cheap USB stick has line in? While waiting for the legendary E1DA Cosmos ADC from china which can take months to arrive, I want to have a USB stick with Line In first.
2. Second. The E1DA Cosmos ADC has low input impedance. Let's say in the future I got source impedance that is very high. It can make the signal in the E1DA so low because of resistive dividing. Are there gadgets where you can decrease or adjust the source impedance to make it much lower so the signal to the E1DA won't be so degraded in magnitude?
3. If no cheap USB stick has Line In. I may just get the cheap (compared to the Behringer) M-Audio M-Track Solo first to try. The reason I mentioned cheap is because I can't get 2 $150 units (both Behringer and E1DA) as I need budget for other things. The temporary one has to be $50 or less. What do you think of the M-Audio M-Track Solo?

--- End quote ---

1. As far as I know, no.
2. You need a buffer amplifier. Most high impedance audio source comes from mic, so a mic phone preamp may do the job.
Navigation
Message Index
Next page
Previous page
There was an error while thanking
Thanking...

Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod