Raspberry Recording Guide

by Devin Yang
(This article was automatically translated.)

Published - 5 years ago ( Updated - 5 years ago )

Query available microphones
You can use arecord -l to list all microphones

root@raspberrypi:~# arecord -l
**** List of CAPTURE Hardware Devices ****
card 1: CameraB404271 [USB Camera-B4.04.27.1], device 0: USB Audio [USB Audio]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 2: B20 [BLUE USB Audio 2.0], device 0: USB Audio [USB Audio]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

Recording
Choose to use card 1 to record cd-quality sound, -d will automatically stop after 5 seconds (48k 16bit)

arecord -D plughw:1 -d 5 -c 4 -r 48000 -f S16_LE test.wav

Choose to use card 2 to record high-quality sound (192k 24bit)

#192k 24bit
arecord -D plughw:2 -c 4 -r 192000 -f S24_LE test.wav

Play

aplay test.wav

Tags:

Devin Yang

Feel free to ask me, if you don't get it.:)

No Comment

Post your comment

Login is required to leave comments

dns

Clear MacOS DNS cache

Instructions on how to clear the DNS cache of various versions of MacOS

Use Python to execute system commands

This is a very basic example, how to use Python to execute system commands and run some automated scheduling can be used for reference.

laravel,sftp

Use Laravel's Storage SFTP Drvier for remote file upload

Why do I separate the front and back of the website? My idea is very simple, that is to rely on a set of background to control all the website data in the foreground. Assuming that the front-end website is a pure marketing website, it is nothing more than the subject content, just like the article above, without any particularly complicated logic. Therefore, it is enough to set up the backend database and connect different frontends. Then there is the last question, how can my backend HTML editor post pictures directly to the frontend? Laravel's Storage SFT Driver is a good antidote.