Microphone button is disabled/greyed after sending the first message

[compulim]

Copied from ticket.

Notes to fixer

• Make sure if synthesis failed, we will not gray out the microphone

Version

What version of the Emulator are you using?

Not mentioned in the ticket.

Describe the bug

Customer has added speech functionality to Bot. When they test the Bot with Web Chat, they do not see any issue. But when testing the Bot with Emulator (v4), the customer sees that the microphone icon gets disabled (greyed out) after sending the first message to the Bot, irrespective of whether the message is sent as text by typing or using Voice.

To Reproduce

1. The customer's Bot code's speech functionality works as expected with Web Chat.

2. The microphone icon is getting grayed out when testing the Bot on Emulator.

3. Even if the first message to the Bot is sent in text, the microphone icon is getting grayed out.

4. Created a new Bot, integrated Direct Line Speech channel to the Bot and tested the Bot on emulator. Even for this new Bot, we were seeing the microphone icon getting grayed out.

Expected behavior

N/A

Additional context

The customer wants to know if this is by design for Bot Framework Emulator (v4). If this is an issue, he wants help in identifying the cause an fixing it.

[bug]

[tonyanziano]

After doing some investigation, I'm able to reproduce this issue in the latest version of the Emulator.

I'm currently looking into the code to see if I can identify the bug on our end.

[tonyanziano]

It looks like the call to the BingSpeech synthesis API errors out with a 401 in Emulator because the key we use is not compatible with the syntesis API. This means that Web Chat is stuck waiting for the synthesis step to complete -- which it never does -- and disables the microphone button in the process.

[SUMANA-MAJUMDER18]

I checked with the customer and he mentioned that the Emulator version where he could see the issue was v4.5.2.