[Debraj] needed a simple signal ... the tone generator built into Audacity was quite useful, at least for generating waveforms at less than 20 KHz or so. Upon plugging his scope into his sound ...

[RichDecibels] wrote in to share a new device he built called the “Sinster Tone Generator ... If you swing by his site, he has a long audio demo of the device in action with a bit of reverb ...