Multiple inheritance error when attempting to use A2DPSource as a Stream

[tahosa]

I'm attempting to use the the A2DPSource as a destination for a stream copy using the utility from arduino-audio-tools. Maybe I'm misunderstanding since it's been a long time since I've worked with C++, but StreamCopy should accept anything that derives from arduino::Print as a target. A2DPSource does appear to extend that interface, but when I try to use it, I get a compiler error that there is an ambiguous base:

error: 'arduino::Print' is an ambiguous base of 'A2DPSource'

I have added arduino-audio-tools v1.0.1 as a zip library in the Arduino IDE along with adding arduino-pico using the board manager.

Here is a simple sketch that reproduces the error:

#include <AudioTools.h>
#include <BluetoothAudio.h>

I2SStream in;
A2DPSource out;
StreamCopy copier(out, in);

void setup() {
}

void loop() {
}

Is there something I'm missing, or need to explicitly cast? I have tried to do so, but arduino::Print and arduino::Stream are both abstract classes and I'm not sure what concrete class I would need to cast to in order for this to work.

[earlephilhower]

Sorry, but I really don't know anything about that library. You may want to ping the author there and see what his suggestion is.

It's possible there's some weird C++ multiple inheritance issue here, but none of the examples in this repo are throwing errors and this is the first report like this.