Text to speech transform block

This is a transformation block that adds words or short sentences to your Edge Impulse project.

How to run (Edge Impulse)

1. You'll need a Google Cloud API key:

   • Enable the TTS API for your account: https://cloud.google.com/nodejs/docs/reference/text-to-speech/latest#before-you-begin
   • Create an API Key: https://cloud.google.com/docs/authentication/api-keys

2. Add the API key as a secret to your Edge Impulse organization:

   1. Go to your Edge Impulse organization.
   2. Click Custom blocks > Transformation
   3. Click Add new secret
   4. Set as name: GOOGLE_CLOUD_TTS_API_KEY, as value the API Key you created in step 1.

3. Create a new transformation block:

   $ edge-impulse-blocks init
   
   ? Choose a type of block Transformation block
   ? Choose an option Create a new block
   ? Enter the name of your block Google Cloud text-to-speech
   ? Enter the description of your block Use Google Cloud's TTS API to generate new keywords. Takes in --keyword, --label, --lang and --count
   ? What type of data does this block operate on? Standalone (runs the container, but no files / data items passed in)
   ? Which buckets do you want to mount into this block (will be mounted under /mnt/s3fs/BUCKET_NAME, you can change these mount points in the St
   udio)?
   ? Would you like to download and load the example repository? no
   

4. Push the block:

   $ edge-impulse-blocks push
   

5. Now, you can add data to your project via:

   1. Go to your Edge Impulse project.

   2. Select Data sources > Add new data source

   3. Select Transformation block, Google Cloud text-to-speech, and set your arguments, e.g.:

      --keyword "Hello world" --lang nl-NL,en-US --count 100 --label helloworld
      

   4. Run the data source, then remove the data source again.

How to run locally

1. You'll need a Google Cloud API key:

   • Enable the TTS API for your account: https://cloud.google.com/nodejs/docs/reference/text-to-speech/latest#before-you-begin
   • Create an API Key: https://cloud.google.com/docs/authentication/api-keys

2. Create a file called set-env.sh and set:

   export EI_PROJECT_ID=12009
   export EI_PROJECT_API_KEY=ei_...
   export EI_API_ENDPOINT=https://studio.edgeimpulse.com
   export EI_INGESTION_HOST=edgeimpulse.com
   export GOOGLE_CLOUD_TTS_API_KEY=AI...
   

3. Then, source the environment variables and run the script:

   source set-env.sh
   node tts.js --keyword "Hello world" --lang nl-NL,en-US --count 10 --label helloworld
   

   You'll find your files in out-wav/.

4. Upload the files to your project via:

   edge-impulse-uploader --api-key $EI_PROJECT_API_KEY out-wav/*.wav