record voice using Rpi alsamixer and arecord
problem weird whistle/whine/interference sound
Ah, that is usually called positive audio feedback oscillation, or Larsen Effect.
Install latest driver.
Try another USB sound card. Don't use cheapy or fancy cards like 3D, 7.1. I recommend just simple mono or stereo.
Positive audio feedback usually centres around the high frequency end. If you don't need very HiFi, you can get a sound card such a uGreen which enables you to select low frequency mode, that can reduce positive feedback triggering.
And when recording, try place microphone and speaker further apart, not facing each other, rearranging long cable, use shielded/grounded wires, turn down volume etc etc to change the physical positive feedback path.
If you are recording in a small room, or a narrow partition, it sometimes helps to place soft cloth curtains around you, or face loudspeaker towards an open window. The main idea is to change the main sound reflection path and phase angle, thus reduce the chance of triggering oscillation, ...
Audio feedback - Wikipedia
Audio feedback (also known as acoustic feedback, simply as feedback,
or the Larsen effect) is a special kind of positive loop gain which
occurs when a sound loop exists between an audio input (for example, a
microphone or guitar pickup) and an audio output (for example, a power
A typical case is that a signal received by the microphone is
amplified and passed out of the loudspeaker. The sound from the
loudspeaker can then be received by the microphone again, amplified
further, and then passed out through the loudspeaker again.
For small PA systems the sound is readily recognized as a loud squeal
Full-duplex Intercom without Larsen Effect (audio feedback)
As both microphones and loudspeakers are always in operation, a
special circuit is used to avoid that the loudspeaker output can be
picked-up by the microphone enclosed in the same box, causing a very
undesirable and loud "howl", i.e. the well known "Larsen effect".
The unusual feature of this design is the microphone amplifier Q1: its
180° phase-shifted audio output taken at the Collector and its
in-phase output taken at the Emitter are mixed by the C3, C4, R7 and
R8 network and R7 is trimmed until the two incoming signals almost
cancel out. In this way, the loudspeaker will reproduce a very faint
copy of the signals picked-up by the microphone.
Troubleshooting Rpi Larsen Effect Problem - answers.microsoft.com
Sound Audio Playback Echo on Windows 10 OT- unwanted sound echo
... I want to disable the strange echo/surround sound effect that I
have, no matter what playback I disable or configure or whatever
setting I change related to sound, this echo doesn't go away. I'm
starting to get frustrated over this.
Sound problems can be caused by cables that aren't connected properly,
damaged drivers, incompatible drivers, sound settings, missing
updates, and problems with your sound card.
uninstall the sound card drivers
restart the computer.
install the latest drivers and chcheck if that resolves the issue.
Ugreen USB 2.0 Multimode External Sound Card US$12
Raw mode - HiFi Film mode - surround sound Music mode - low and high
frequency compensated Game mode - low frequency boost
Cmedia CM6533 chip set (with 5 band equalizer and AGC)
Built-in 8051, 256K Byte flash, 32k RAM, GPIO pins, I2C/SPI/UART
DAC/ADC 8 ~ 96kHz sampling rate, 16/24 bits resolution Equalizer to
compensate microphone and headphone frequency response
Top 10 Best Usb Sound Card Black Friday Deals 2018 - November 23, 2018 by Ami Way
consulted 50 experts and surveyed 7,000 users
Top 10 best Usb Sound Card 2018
1) USB Sound Card Adapter BENGOO External Audio Adapter
2) Sabrent USB External Stereo Sound Adapter
3) UGREEN USB Audio Adapter External Stereo Sound Card
It protects against electromagnetic interference and enjoy the stable
and best sound quality; a second sound source for simultaneous
operation of loudspeakers and headphones.
4) Sound Blaster Play! 3
5) UGREEN USB Sound Card External Converter
6) Sabrent Aluminum USB External Stereo Sound Adapter
7) StarTech.com 7.1 with SPDIF Digital Audio
8) Plugable USB Audio Adapter
9) HyperX Cloud Virtual 7.1 Surround Sound USB Card
10) Creative Sound Blaster Omni Surround 5.1 with headphone amp and
Integrated beam forming microphone