French musician Arthur Udhu has gained more than 20,000 followers on RedNote. [Photo provided to China Daily] Arthur Udhu doesn't need much to create music — just his guitar and a microphone.

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To ensure seamless compatibility with the telephone network, [Peter] used components from old desk phones, including line transformers, a DTMF keypad and even a mechanical ringer. His blog post is ...

We independently review everything we recommend. When you buy through our links, we may earn a commission. Learn more› By Roderick Scott and Nick Guy We’ve added details about the new Magic ...

It relies on the fact that almost every ham radio designed for field use incorporates a DTMF encoder in the microphone or in the transceiver itself. Hams have used Touch Tones for in-band ...