dotnet

Leopard Speech-to-Text Demos

Made in Vancouver, Canada by Picovoice

Leopard

Leopard is an on-device speech-to-text engine. Leopard is:

• Private; All voice processing runs locally.
• Accurate [1]
• Compact and Computationally-Efficient [2]
• Cross-Platform:
  • Linux (x86_64)
  • macOS (x86_64, arm64)
  • Windows (x86_64)
  • Android
  • iOS
  • Raspberry Pi (3, 4, 5)
  • NVIDIA Jetson Nano

Requirements

• .NET Core 3.1

Compatibility

• Linux (x86_64)
• macOS (x86_64)
• Windows (x86_64)
• Raspberry Pi:
  • 3 (32 and 64 bit)
  • 4 (32 and 64 bit)
  • 5 (32 and 64 bit)
• NVIDIA Jetson Nano

Installation

Both demos use Microsoft's .NET Core framework.

Build with the dotnet CLI:

dotnet build -c MicDemo.Release
dotnet build -c FileDemo.Release

AccessKey

Leopard requires a valid Picovoice AccessKey at initialization. AccessKey acts as your credentials when using Leopard SDKs. You can get your AccessKey for free. Make sure to keep your AccessKey secret. Signup or Login to Picovoice Console to get your AccessKey.

Usage

NOTE: File path arguments must be absolute paths. The working directory for the following dotnet commands is:

Leopard/demo/dotnet/LeopardDemo

File Demo

Run the following in the terminal:

dotnet run -c FileDemo.Release -- \
--input_audio_path ${AUDIO_FILE_PATH} \
--access_key ${ACCESS_KEY} \

Replace ${ACCESS_KEY} with yours obtained from Picovoice Console and ${AUDIO_FILE_PATH} with a path to an audio file you wish to transcribe.

Microphone Demo

You need a working microphone connected to your machine for this demo. Run the following in the terminal:

dotnet run -c MicDemo.Release -- \
--access_key ${ACCESS_KEY} \

It is possible that the default audio input device is not the one you wish to use. There are a couple of debugging facilities baked into the demo application to solve this. First, type the following into the console:

dotnet run -c MicDemo.Release -- --show_audio_devices

It provides information about various audio input devices on the box. This is an example of the output:

index: 0, device name: USB Audio Device
index: 1, device name: MacBook Air Microphone

You can use the device index to specify which microphone to use for the demo. For instance, if you want to use the USB Audio Device in the above example, you can invoke the demo application as below:

dotnet run -c MicDemo.Release -- \
--access_key ${ACCESS_KEY} \
--audio_device_index 0