audio-recording extension overrides set built-in speak <OFF> and set volume

[martinwork]

Describe the bug

The audio-recording extension turns on the built-in speaker and sets the volume high for speaker and audio pin (e.g. earphone)
https://github.com/microsoft/pxt-microbit/blob/master/libs/audio-recording/recording.cpp#L55

Workaround: set sample rate to 11000 before adjusting speaker and volume, or adjust after recording.

To Reproduce
Steps to reproduce the behavior:

1. Open https://makecode.microbit.org/_CYtDeAAMMX1p
2. Send to micro:bit
3. Press A
4. Press B
5. Hear speaker

Expected behavior
Able to turn off built-in speaker and adjust volume.

Screenshots

micro:bit version (please complete the following information):
V2

Desktop (please complete the following information):

• OS: [e.g. iOS] Windows
• Browser [e.g. chrome, safari] Chrome
• Version [e.g. 22] 132

[microbit-carlos]

Thanks @martinwork! Do you think this could be an issue in the CODAL layer? Would you be able to create a C++ to check and open an issue there as well if it's the case?

[martinwork]

@microbit-carlos The cause is in the extension

pxt-microbit/libs/audio-recording/recording.cpp

Line 55 in 924338d

uBit.audio.mixer.setVolume(1000);