Hello there 
My head is going to explode! I want to connect the td-3-mo with the Polyend Play Plus… But the sound is not working. I’ve connected the Midi-Out cable in both versions, and the clock works, but the sound is not coming out 
Can you help me? Thank you very much 
hi DamOne,
where is your audio cable from the td3 going? you need to connect your td3 audio out to something that has an audio in. like an audio interface, mixer, another unit in your setup that has an audio in etc.
that’s the first port of call.
Hi beautron
In the end, I connected the td3 to an Elektron Digitakt 
Thanks for the message!
no worries. glad you got sorted 