Bluetooth enabled volume/preamp for my Leach amplifier

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Hi guys,
Years ago I built a Leach amplifier and just dusted it out. I had worked quite hard on it and it's in a nice casing. The problem is I didn't put a volume control back then, and I don't want to add an analog pot as I'd need to modify the casing...

I'd like to add a small board that could do two things:
-> act as a volume control for the analog inputs (ideally controllable with a remote/app)
-> provide bluetooth connectivity

I saw the Sure Bluetooth board here, but that won't give me the line input volume control.
https://www.parts-express.com/sure-...udio-receiver-board-aptx--edr-12-vdc--320-351

Any idea of something off the shelf I could use (I don't mind converting to digital and back to analog...I just want simple that works).

Thanks!
Dave
 
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