Arduino Due DAC audio output problem

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Hi I have recently upgraded from an arduino UNO to a DUE and I'm now trying to use the DAC pins to output a chosen audio input (for the minute an audio file, but hopefully a connectable input after this is sorted).
At first an error would pop up saying "expected input type uint16 instead double was found" which I soon sorted using a converter block. However, now when using the converter, a lot more pops up on the error message screen (see image attached).
It's a very simple circuit connecting the DAC0 output to the positive of the speaker & the ground of the speaker to the ground of the DUE.
Any help would be greatly appreciated.

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Ankita Nargundkar
Ankita Nargundkar 2016-10-20
Try using the following command:
>> ls /dev/tty/*
You will get the list of all the Devices connected. For ex: if one of the devices listed is /dev/tty/usbmodemsd131'. Change the "port" argument to the correct port number. You should be able to connect to arduino.

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