来自 google 官方文档的 Google Cloud Speech to Text NodeJs 在 Google Compute Engine Linux 服务器上不起作用

Question

I want to develop the speech-to-text conversion of streaming input application using google cloud speech API with Nodejs. So I used the Google sample source and installed the SOX(version 14.4.1)recorder in my Window PC and running the Nodejs application in local is working well. But when I uploaded my Nodejs applicaion on Google Compute Engine using Linux Server, the audio device of SOX doesn't work. The error is 【FAIL sox: missing filename】. How is the audio received from the client side? Is there any way to solve above error in Linux? app.js

error

Answer 1

It seems that GCE Linux VMs don't have soundcard support.

To test this, assuming you're running an APT based distribution (Debian or Ubuntu), install alsa-utils with sudo apt-get install alsa-utils , and run sudo aplay -l .

The second command lists all soundcards and digital audio devices. It should give you a result like:

aplay: device_list:270: no soundcards found...

This means that even if you have SoX installed in your Linux GCE VM, you won't be able to use the speech-to-text conversion of streaming input application (for example this or this ).