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Usb microphone for voice and learning
Usb microphone for voice and learning
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Old 4th November 2021, 07:35 PM   #1
windless is offline windless  France
diyAudio Member
Join Date: Nov 2021
Default Usb microphone for voice and learning


I want to build an usb microphone to use on my pc for remote working and podcast recording. If could definitively buy a blue yeti or any streaming microphone but I would not learn much from this.

Where I start from :
-I can solder SMDs, and work wood (and somehow metal)
-I can use kicad and already hade some PCB manufactured for me, but all digital, I come from a software / computer background and don't now much about analog electronic

I've seen this video that seems rather close to what I hade in mind : Building a quality USB-C microphone - YouTube . I have a few questions :
- should I replace the noname usb adc with e.g. a TI PCM2912A or wouldn't it change anything soundwise ?
- the video uses a THAT1512 but that5522 or TI INA849 seems to be newer / better SNR version. Any reason not to use them ?
- he uses a jli-2555 capsule. Is there any close quality capsule I could buy from aliexpress (the $13 jil233 will probably cost about $45 once i've paid shipping, vat and custom fees. Buying on aliexpress I can have almost free shipping shipping and pay the VAT directly so I won't have custom fees)

Thank you,
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Old 4th November 2021, 08:59 PM   #2
rayma is offline rayma  United States
diyAudio Member
Join Date: Apr 2011
Peruse this free, public domain beginning analog book.
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Old 4th November 2021, 11:40 PM   #3
DRONE7 is offline DRONE7  New Zealand
diyAudio Member
Join Date: Aug 2008
There may be some helpful ideas here..
Building a Microphone for Testing Speakers
Homemade "studio" microphone. DIY Directional Microphone USB Microphone Power Scheme for Computer

Reasonable capsules can be had from junked laptops...usually for free.

Last edited by DRONE7; 4th November 2021 at 11:52 PM.
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Old 7th November 2021, 01:43 AM   #4
dangus is offline dangus  Canada
diyAudio Member
Join Date: May 2004
Location: Vancouver Island
I found that a Shure lapel mic sounded the best when I made a recording of myself speaking. That may be better than a "studio" mic if you don't have an acoustically-treated soundproof studio.
If you want to make an interface for a common electret mic capsule, this page looks helpful:
John Conover: Using the Panasonic WM61A as a Measurement Microphone
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