Blog  /  Raspberry Pi Microphone: Integrating Microphone To Your Raspberry Pi

Raspberry Pi Microphone: Integrating Microphone To Your Raspberry Pi

Have you ever purchased a Raspberry only to realize that it doesn’t feature a microphone jack? Having an already integrated model is much easier. Nevertheless, there are many ways of adding one to your Raspberry, depending on your requirements. In this article, we will explore and learn different things that will definitely be very beneficial in your upcoming developments.  

Why is there no Microphone Directly Integrated?

  The Raspberry Pi's central idea is to make a “terminal” with the following three principles.
  • Essential potentials of upgrades
  • Reasonable price
  • Small size
Its objective is not to assimilate all terminal modules within a Raspberry Pi but to set up the cheapest and vital parts. In addition, it also helps you add other components easily according to your requirements. When it comes to the digital microphone, the same concept applies. Besides, it only includes audio jack output and not sound transmitter output files.  
The PureAudio Speech Development Kit for the Raspberry Pi

The PureAudio Speech Development Kit for the Raspberry Pi

Source: Wikimedia Commons.  

How to Add a Microphone To the Raspberry Pi

  Before setting up your microphone port, you need to understand the reason for the installation first. Begin with choosing a sound transmitter that meets your requirements without considering whether it matches perfectly. Just presume that all will go well. As soon as you have your options ready, the following is how you need to install them. We will cover the three common methods used.  

Bluetooth Microphone

  With either headphone or Bluetooth microphone, two instances can take place; You already have Raspberry Pi having Bluetooth installed to detect the microphone automatically. The other instance is that it isn’t sensed.
Wireless Headset Professional

Wireless Headset Professional

  To test if the Raspberry Pi can detect the Bluetooth instinctively, you can use a Bluetooth receiver with a sound transmitter. If it’s working, you will automatically hear the sound switch to the headphones. Besides, you can still test it by recording your tone through a receiver microphone. Note that you can’t modify the output limits over the GUI, specifically the sound. Nevertheless, you can regulate through the alsamixer.  

Bluetooth Not Detected

  Usually, the microphone manufacturers always issue a USB converter if your Bluetooth can't detect the microphone.  

USB Microphone

  Connecting the USB microphone is a modest method. Besides, it’s the cheapest solution with no discrete setup or driver problems. Furthermore, another advantage is that the Raspbian senses the microphone right away. By just plugging it into the USB ports, the sound transmitter will directly display the sound regulator peripherals. After plugging, it will be ready for use; you only need to modify the amplification.  
USB microphone

USB microphone

Source: Wikimedia Commons.  

Jack Microphone

  Installing a jack microphone is one of the complex options. Therefore, you need an excellent purpose to want to go for this solution. You will have to prepend an add-on to your Raspberry Pi because there is no integrated adapter. You will have to install a sound card to connect the microphone jack to help with other implementations. Sound cards are in two types; Hat and USB sound cards.  
Microphones and connectors

Microphones and connectors

 

Hat Sound Card

  The advantage of installing a soundcard is you can find classic ones with actual enhanced sound quality. When you have an advanced project, you can install one through the Raspberry Pi GPIO ports and enjoy the quality professional sound.  

USB Sound Card

  Adding a jack microphone is another straightforward and direct option. The USB jack adapter lets you link the microphone and USB device to your Raspberry Pi. Besides, using the jack ports once you have the exemplary sound transmitter or earpiece is the best solution. All you will need to do is configure your microphone since the Raspbian can sense the adaptor.  
studio sound equipment

studio sound equipment

 

Using a Microphone with a Raspberry Pi

  In this tutorial, we will guide you through the procedure where you can use a sound transmitter with the Raspberry Pi. The Raspberry Pi lacks analog inputs; therefore, purchase either a USB audio card or a USB microphone device. Alternatively, you can buy a HAT that contains extra analog inputs and enhances Raspberry Pi audio device proficiencies.   A rack of audio compressors

A rack of audio compressors

 

Components Required

 
  • USB Sound Card or USB Microphone device
  • WiFi or Ethernet Cable
  • Raspberry Pi
  • Power Supply
  • Micro SD Card
Optional  

Configuring Alsa on your Raspberry Pi for your Microphone

  First, start by plugging your sound transmitter into your Raspberry Pi. It could be through a USB microphone, USB sound card, or HAT. Step 1 To ensure that everything is up to date, you need to run the following commands. It will help update our system.
Step 2 Now that the system is up-to-date, we need to know if the Alsa driver has identified our microphone. By running this command, we will see all the recording devices available.
Step 3 Within the terminal, you will view these appearing after running the command.
Concentrate more on just two things in this step; the device number and card number. After identifying the two numbers, move to the subsequent stage. Step 4 In this step, we need to design a configuration audio file for Alsa. That Alsa motor will be helping it know which device it can use to capture audio. Run the following order to amend the folder.
Step 5 Afterward, with the values you recovered in step 3, ensure you substitute both [device number] and [card number]
After completing that command, press CTRL + X and then ENTER to save the file.  

Recording with your Microphone on your Raspberry Pi

  As mentioned earlier, you can use the microphone mic on your Raspberry Pi to record. Therefore, in this section of our guide, we will learn how. Step 1 Begin by running this order to make footage.  It will make a record through the microphone unit and save the new sound file this way .
Once completed with recording, you can press CTRL + C to exit out. Ensure you plug in the microphone correctly. Otherwise, you will get an error message. In addition, ensure you verify the .asoundrc file accurately by confirming every configuration is successful and well done. Step 2 Next, play the record to authenticate that your microphone recorded successfully.  Run the following commands to playback.
Once you hear your soundtrack, you can be sure your microphone has all the records.  

Controlling your Microphone Gain on the Raspberry Pi

  The good news is that if the recordings aren’t clear, you can modify the gain through the microphone. Follow the following procedure. Step 1 Using the Alsamixer tool, run this command;
Step 2 You can reduce and raise the gain using the tool’s navigation keys. Nevertheless, you can also use the F6 key to choose your analog microphones if it isn’t available. Afterward, press the ESC key to exit the program once you are done. Finally, you now understand how you can use the microphone with the Raspberry.  

Raspberry Pi projects with a Microphone

  Note that you can perform many developments with Raspberry Pi; the most crucial component is a quality microphone. We will cover two-example projects to get some ideas.  

Baby Monitor

 
Parent checking newborn through the baby monitor

Parent checking newborn through the baby monitor

  The baby monitor is one of the remarkable projects. Nevertheless, it can still be complicated.  Definitely, with your Raspberry, you can add the following components;
  • Humidity and temperature monitors to ensure the space is comfortable
  • Camera for monitoring
  • Speaker for playing a lullaby
  • Microphone for listening to the baby
 

Home Assistant

  In our contemporary world, personal assistants are becoming part of our lives by helping in different stuff. For instance, Google Assistant, Alexa, Siri, etc. You can also alter a Raspberry Pi in Amazon Echo. Besides, you only need to know that various web projects let you run your choice of home assistant on Raspberry Pi pico. Similarly, they allow you to customize them as per your partialities. With your Raspberry Pi, codding, and a speaker, you can create your preferred home assistant. The microphone is the most essential equipment; you already have 50% basic ingredients once you have it.  
Audio cables

Audio cables

 

Summary

  There are several reasons why you will find a microphone that is not integrated directly into your Raspberry Pi. However, there is no need to render such Raspberry Pi useless. You can use different methods to add the microphone to your Raspberry Pi pico. Besides, apart from being functional with a microphone, you can use the port in several other ways.