Mic/Amp for Recording With Single-Board Computer

Products & Technology ReSpeaker
#1

Want to replace an iPhone 5S for recording with a single-board computer. The iPhone can boost its MEMS microphone by +10.00, which helps capture ambient sounds, but the battery is limiting and can’t schedule recordings.

Need a small mic (stereo plug?) and a way to boost it (DAC/Amp), preferably using the USB port of a single-board computer like the Raspberry Pi.

#2

@salman What do you think ?

#3

Hi @lanio, Regarding the MIC SeeedStudio has multiple options that are available in the store from the plug and play device to DIY hackable/tinkering device.

1. ReSpeaker USB Mic Array :

Plug&Play Far-field microphone array for your application! Not a bare dev board, but an out-of-the-box device.
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Features

  • Plug & Play (No driver required), compatible with Windows 10/8/7, Mac, Linux and Android that support OTG.
  • Voice Pick-up device, Far-field voice pick-up up to 5m and supports 360° pick-up pattern
  • Acoustic algorithms implemented:
  • DOA(Direction of Arrival),
  • AEC(Automatic Echo Cancellation),
  • AGC(Automatic Gain Control),
  • NS(Noice Suppression)
  • Built-in audio jack, which allows for plugging in headphones or speakers (speaker not included

Store Link: https://www.seeedstudio.com/ReSpeaker-USB-Mic-Array-p-4247.html

2. ReSpeaker 4-Mic Linear Array Kit for Raspberry Pi :

ReSpeaker 4-Mic Linear Array Kit for Raspberry Pi includes a voice accessory HAT and a 4-microphones linear array. You can build a more powerful and flexible voice product with Raspberry Pi which can integrate Amazon Alexa Voice Service, Google Assistant, and so on.

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Features

  • 2 ADC chips and 1 DAC chip
  • 8 input and 8 output channels
  • Four microphones array
  • Grove support
  • Compatible with Raspberry Pi 40-pin headers
  • Headset and speaker voice output
  • Compatible with Raspberry Pi 4

3. ReSpeaker 4-Mic Array for Raspberry Pi

ReSpeaker 4-Mic Array for Raspberry Pi is a 4 microphone expansion board for Raspberry Pi designed for AI and voice applications, which will help you build a more powerful and flexible voice product that integrates Amazon Alexa Voice Service, Google Assistant, and so on.

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there are more models also available the respeaker, check here for more details https://www.seeedstudio.com/catalogsearch/result/?q=respeaker

Conclusion:

I think the ReSpeaker USB Mic Array will be a great fit for your application for the use case, take a look and let me know your thoughts. :slightly_smiling_face::+1:

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#4

Thank you very much for the info, will check your suggestions.

The hardest part is the audio capturing of ambient sounds. Most applications I’ve seen do the opposite, capture close up voice/instrument and cancel background noise.

I wonder if the voice focus of the products and features like “Automatic Gain Control”, and “Noice Suppression” could prevent them from getting good volume levels when sound is not voice and not close to the microphones.

Even the iPhone won’t allow explosive sounds to clip, but I can set the mic gain to max (+10.00) and the recordings have good volume levels, which I don’t get with other phones or portable recorders.

1 Like