Hi, I'm using a teensy 3.2 with the audio shield. The connections are all soldered by me (possible damage?)
My microphone is this battery powered camera microphone. https://www.amazon.com/dp/B00E58AA0I?psc=1&ref=ppx_yo2_dt_b_product_details
However I don't think this is the problem because the sound still happens when the mic is disconnected, but it's also mixed with a much louder buzzing from the mic being disconnected, which makes it harder to distinguish.
This is the noise... careful, it's loud when I talk in the beginning, compared to the noise
https://soundcloud.com/user-731846263/record
What I tried:
1. Turning off the high pass filter in the code
2. Audio jack ground loop isolator (tried both in headphone hack and microphone jack)
3. Powering from battery source instead of usb (does that mean a usb ground loop isolator won't work?)
None of these worked... can anyone offer suggestions or ideas? I appreciate it
One more question... can anyone please recommend other audio specific microcontrollers which are good for recording? I need the least noisy one possible. Thanks
My microphone is this battery powered camera microphone. https://www.amazon.com/dp/B00E58AA0I?psc=1&ref=ppx_yo2_dt_b_product_details
However I don't think this is the problem because the sound still happens when the mic is disconnected, but it's also mixed with a much louder buzzing from the mic being disconnected, which makes it harder to distinguish.
This is the noise... careful, it's loud when I talk in the beginning, compared to the noise
https://soundcloud.com/user-731846263/record
What I tried:
1. Turning off the high pass filter in the code
2. Audio jack ground loop isolator (tried both in headphone hack and microphone jack)
3. Powering from battery source instead of usb (does that mean a usb ground loop isolator won't work?)
None of these worked... can anyone offer suggestions or ideas? I appreciate it
One more question... can anyone please recommend other audio specific microcontrollers which are good for recording? I need the least noisy one possible. Thanks