Need help with basics

[userHarpreet]

Hello there,
I am very new to this, thus very basic questions.

I am trying to interface INMP441 with ESP-WROOM-32 and using my Bluetooth speaker as sink.

Q1: What is the difference between examples basic-i2s-a2dp and stream-i2s-a2dp?
Q2: How can I copy the Left channel to Right as INMP441 gives output to only single channel?
Q3: Can we use a2dp.set_volume to set different volumes to both channels, if not then how it's possible?

[pschatzmann]

1: stream-i2s-a2dp shows how to use the Stream API where the basic example just uses the callback provided by the a2dp library: The basic example is more efficent!

2: There are many possiblilities e.g.

• if you leave i2s to provide 2 channels: use a ConverterFillLeftAndRight converter
• if you set up i2s correctly to provide only 1 channels : use a ChannelFormatConverterStream

3: No - you would need to replace the volume handling implemented in the a2dp library with a VolumeStream

ps. dont forget the Wiki about the INMP441, since this is quite tricky to use.

[pschatzmann]

Just have a look at the class documentation!

Alternatively you can use it together with a ConverterStream as mentioned in the Readme.

[userHarpreet]

Thanks a lot for quick responses, I have figured it out.

Great work.

[userHarpreet]

Sorry i have a further concern about the Q3, is there support for balance for A2DP, can I achieve this by using that?

[pschatzmann]

Did you read the Wiki: there is a chapter about panning!

[userHarpreet]

Thanks a lot.
My bad, I was searching for balance instead of panning.