# Hash DTMF transfer to T-Deck

_Showcase · started by circfruit on Sun, Sep 27, 2026 4:37 PM_

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## Original post

**circfruit** · Sun, Sep 27, 2026 4:37 PM

Nobody wants to type hashes on the T-Deck. It doesn't have a camera, so QR codes can't be used.
I came up with a way to leverage the microphone and transfer a hash from my Mac using a DTMF
[Here is a Link to YouTrube demo.](https://youtu.be/_TOFzw0kwr0?si=tLbsiWTfxsAcXVWZ)

Few difficulties until we get a successful transfer:

1. My t-deck is v.1 without factory enclosure, so I've printed one. The acoustics of the case are not good and the tones for a-d were resonating and the code couldn't recognize them. I had to stuff some cotton to stop the vibrations

2. It seems stereo DTMF can also worsen the process - I have to hold the T-deck on one of the sides of the Macbook so it pick one of the speakers louder than the other

For string->DTMF I'm using a python script which generated the WAV and plays it. For OS glue, I'm using Shortcuts, showing in the right-click context menu an "Transfer with sound". On non-macs, you could automate another way using the same python script.

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## Reply 1

**NONGKHAEM_BKK_TH** · Sun, Sep 27, 2026 4:58 PM

This is very , very cool. Gotta love that 'dial tone' sound!

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