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Raspberry Pi - Voice Recording & Text-to-Speech

Raspberry Pi,

This tutorial is about the Voice Recording and Test to speech Using Raspberry Pi. But First, let's have a small introduction about Raspberry Pi.

Introduction
Raspberry Pi 3 Model B



System on Chip(SoC)
  • What is System on Chip?
                - A complex IC that integrates the major functional elements into a single chip or chipset.
  • Programmable processors
  • On-chip memory
  • Accelerating function hardware (e.g. GPU)
  • Both hardware and Software
  • Analog components
  • Benefits of SoC
                  - Reduce overall system cost
                  - Increase performance
                  - Lower power consumption
                  - Reduce size

Soc in Raspberry Pi: Broadcom BCCM2835 SoC Multimedia Processor
  • CPU
            - ARM 1176JZF-S (armv6k) 700MHz
            - RISC Architecture and low power draw
            - Not compatible with traditional PC software
  • GPU
            - Broadcom Video IV
            - Specialized graphical instruction sets
  • RAM
            - 512MB (Model B rev.2)
            - 256MB (Model A, Model B rev.1)

Labeled Diagram of Raspberry Pi

Voice Recording AndText-to-speech using R-Pi

Component Required:
  • Rasberry Pi 3 Model-B
  • Adapter Charger micro USB-b Type 5v,2Amp
  • Sound Card
  • Mic
  • Speaker

Connection Diagram:


For more watch video.

Step1: Checking Your Microphone

You need to first check whether your microphone record properly or not. Check microphone is listed or not by using command "lsusb". Next, we need to set the mic recording volume high by using command "alsamixer". Now, you need to check if the recording takes place properly by using command "arecord -l".

Step2: Recording Your Voice

To record your voice use command "arecord -D plughw:1,0 test.wav". Record your voice message and to terminate recording press Ctrl+Z.

Step3: Play Your Recording

To play your recording use command "aplay test.wav".

Text-to-speech

To give R-pi a voice we must first install some software called eSpeak.
Install eSpeak by using the following command:

Sudo apt-get install espeak

After installing the eSpeak r-pi is ready. Now, by the following command you can give Text-to-speech command to your r-pi.

espeak “Hello World! My name is Raspberry Pi” > /dev/null

Press enter.

For more, you can watch our Video.


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