Smart projects for the Raspberry Pi Zero

Voice as an Interface

Using voice as an interface has been terrible in the past, and felt more like a gamble than accurate control. But with recent improvements in speech recognition and natural language understanding, smart assistants conquered our homes. But can a voice interface actually be useful and more than just a fun toy to show off? Why…
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Nyumaya audio recognition V0.1

In the previous Blog posts, we gave you some project ideas for audio machine-learning and showed you how to clean a dataset. But putting a trained neural network into production is still be very hard and time-consuming. By tweaking network architectures, the feature extraction process, audio capturing, result postprocessing and gathering different datasets we are…
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Cleaning up the speech-command dataset

Cleaning the SpeechCommand dataset

Simple Audio Recognition The Tensorflow Simple Audio Recognition tutorial is a great way to get started with machine learning. It uses the Speech Command Dataset to detect spoken occurrences of different keywords. With an accuracy of 85 to 90%, it’s pretty good but I want to take it a step further. The first step was…
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Project ideas for audio machine learning

12 project ideas for audio machine learning

Add a microphone hat to your Raspberry Pi and make some cool audio detection based projects. We assembled some ideas for projects if you want to dive into audio machine learning. 1. Ninja robot vacuum cleaner Give your robot vacuum cleaner ninja-like stealth abilities. It could listen for human activity, like voice and footsteps to…
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The hidden value of audio data

Use machine learning to uncover the hidden value of audio data

A hidden treasure Audio is one of the five human senses and carries surprisingly much information. Close your eyes and listen to some sounds nearby. Chances are you can get a pretty good overview of what’s going on around you. You can hear cars passing by and count them. You can estimate how fast they…
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Wake-word on Pi Zero

Wake word detection on the Raspberry Pi Zero

Why do we need wake word detection? Wake-word or hot-word detection is an important part of a digital voice interface for two reasons. Transcribing speech to text is a hard task. Usually, voice data is sent to a powerful server which does the transcription. Nobody wants their end device to stream nonstop every sample captured…
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Zenbu Smart-Speaker

Zenbu a voice pHat for the Raspberry Pi Zero

Finally, the Zenbu-pHat is here and with it comes an awesome speaker kit. Featuring two microphones a 3 Watt amplifier and loads of expansion connections enable you to build a whole range of projects. You may have noticed the Zenbu-pHat has changed a bit since its first version. To improve the captured audio and to…
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