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Bluetooth audio transmitter with selectable input level cut-off

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electr_peter:
I am looking for solution to bluetooth audio transmitting task. Features needed in BT audio transmitter:
* maintain BT connection with BT headset
* receive audio input from external source (3.5 mm input)
* transmit audio via BT only if input audio level is higher than some thresholdCurrently used BT audio transmitter CSR8675 based, similar to Recepteur-Bluetooth-5-0-CSR8675-Adaptateur-USB-audio-de-musique-sans-fil) is too keen to transmit - it is always transmitting audio, even when audio input is silent or missing.

Slightly different BT audio transmitting principle is needed (used with smart phones) - that is, transmitter should maintain BT connection, but stream audio only when audio source is present (music player is on or call is in progress).

Can you suggest a better solution (preferably something off the shelf)?

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