[RichDecibels] wrote in to share a new device he built called the “Sinster Tone Generator”. It’s basically a bass drone synthesizer that uses two pairs of heterodyning oscillators to ...

So, how can a set of audio tone generators be turned into a sampled ... The answer lies in making best use of the controls the chip does offer, namely frequency and volume of a tone.

It is a Walter Jones & Co. 17Hz ringing tone generator, an example of the emerging ingenuity applied to the early communication systems. It was part of a manually operated telephone exchange.